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< Back DMOS High Speed Switches by Linear Systems Linear Systems Jun 17, 2024 The Linear Systems family of DMOS devices is designed to handle a wide range of video, fast ATE, telecom and other analog switching applications. These components are capable of ultrafast switching speeds (tr = 1 ns, tOFF = 3 ns) and excellent transient response. Thanks to reduced parasitic capacitances, our DMOS can handle wideband signals with high off-isolation and minimum crosstalk. Linear Systems is a leading manufacturer of DMOS high speed switches , providing innovative solutions for a wide range of applications. Our advanced DMOS technology allows for faster switching times, lower power consumption and improved reliability. In this article, we will explore the features and benefits of our DMOS high speed switches in more detail. Introduction to DMOS High Speed Switches DMOS (Double-Diffused Metal-Oxide-Semiconductor) technology is a type of power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) commonly used in high speed switching applications. It offers several advantages over traditional bipolar junction transistors, such as higher breakdown voltage, faster switching times and lower on-resistance. This makes DMOS high speed switches ideal for use in a variety of industries, including telecommunications, automotive and aerospace. Features of DMOS High Speed Switches DMOS high speed switches offer several key features that make them stand out from other types of power MOSFETs. These include: Higher breakdown voltage: DMOS technology allows for higher breakdown voltage compared to other MOSFETs. This means that DMOS high speed switches can handle higher voltages without being damaged, making them suitable for use in high power applications. Faster switching times: Due to the low capacitance and on-resistance of DMOS high speed switches, they are able to switch on and off much faster than traditional bipolar junction transistors. This results in improved overall system performance and efficiency. Lower power consumption: DMOS technology offers lower on-resistance, which translates to less power being wasted as heat. This makes DMOS high speed switches a more energy-efficient option for systems that require frequent switching. Benefits of Using DMOS High Speed Switches The use of DMOS high speed switches can bring a number of benefits to various applications, including: Improved performance: With their faster switching times and lower on-resistance, DMOS high speed switches can help improve the overall performance and efficiency of electronic systems. Higher power handling capabilities: The higher breakdown voltage of DMOS technology allows for higher power handling capabilities, making DMOS high speed switches suitable for use in high power applications such as motor control and power supplies. Cost-effectiveness: Due to their lower power consumption and improved performance, the use of DMOS high speed switches can result in cost savings over time. Compact size: The low on-resistance of DMOS high speed switches allows for them to be made in smaller sizes, making them ideal for use in compact electronic devices and systems. Reliability: DMOS technology has been extensively researched and developed, resulting in highly reliable high speed switches that can operate efficiently over a wide range of temperatures and voltages. Overall, the use of DMOS high speed switches offers a number of advantages over other types of switches, making them a popular choice for various applications in industries such as automotive, aerospace, and consumer electronics. With ongoing advancements in DMOS technology, these high speed switches are expected to continue improving and becoming more versatile for use in a wide range of electronic systems. So, it is clear that DMOS high speed switches play an important role in the advancement of modern technology and will continue to do so in the future. DMOS high speed switches are also compatible with various control methods, such as pulse width modulation (PWM) and pulse frequency modulation (PFM), making them suitable for use in a variety of electronic systems that require precise control over switching frequency and duty cycle. They can also be easily integrated into existing electronic circuits, making them a versatile choice for design engineers. Moreover, DMOS high speed switches offer low switching losses and fast response times, which helps reduce electromagnetic interference (EMI) in electronic systems. This is especially beneficial for applications that require high levels of efficiency and minimal noise, such as power converters and motor controllers. In addition to these advantages, DMOS high speed switches also have a high current handling capability, making them ideal for high power applications. This is due to their low on-resistance and efficient heat dissipation properties, allowing them to handle large currents without overheating. Furthermore, DMOS high speed switches are designed with built-in protection features such as overcurrent protection (OCP) and thermal shutdown (TSD), ensuring safe and reliable operation even under harsh conditions. Overall, the continued advancements in DMOS technology have led to the development of high speed switches that offer a wide range of benefits for various electronic systems. With their versatility, efficiency, and reliability, these switches are expected to play a crucial role in driving the progress of modern technology. From consumer electronics to industrial applications, DMOS high speed switches are paving the way for more efficient, compact, and reliable electronic systems. As technology continues to evolve, it's likely that DMOS high speed switches will continue to be a key component in driving innovation and progress in the electronic industry. So whether you're designing a power converter for renewable energy sources or a motor controller for electric vehicles, consider using DMOS high speed switches to take advantage of their numerous benefits and contribute to the advancement of technology. With these high speed switches, the possibilities for electronic applications are endless. The future is bright for DMOS technology and we can expect even more exciting developments in the years to come. In conclusion, DMOS high speed switches have revolutionized the field of power electronics by offering a unique combination of speed, efficiency, and reliability. Through continuous advancements in technology, these switches have become an integral part of modern electronic systems and are expected to play a crucial role in the future of technology. So whether you're an engineer working on cutting-edge technologies or a consumer benefiting from the convenience of electronic devices, DMOS high speed switches have helped make it all possible. As we continue to push the boundaries of what is possible, DMOS technology will undoubtedly continue to play a pivotal role in driving innovation and progress. So let's embrace the potential of DMOS high speed switches and see where they take us next in our technological journey. The possibilities are limitless! So why wait? Start incorporating DMOS high speed switches into your designs today and be a part of the exciting future of technology. Happy switching! #DMOS #highspeedswitches #technology #innovation Why DMOS High Speed Switches Are Crucial for Driving Innovation in the Electronic Industry The electronic industry is constantly evolving and pushing the boundaries of what is possible, and a key component in this progress has been the development of DMOS high speed switches. These switches have become essential in various electronic applications, from power supplies and motor drives to telecommunications and consumer electronics. But what sets DMOS high speed switches apart from other switch technologies? Let's take a closer look at why these switches are crucial for driving innovation in the electronic industry. Speed One of the most significant advantages of DMOS high speed switches is their speed. These switches are capable of switching on and off at incredibly high speeds, making them ideal for use in applications that require rapid switching. This speed is essential for efficient operation and precise control in electronic devices. Efficiency Efficiency is another critical factor in the electronic industry, and DMOS high speed switches excel in this aspect as well. These switches have a low on-resistance, meaning they can handle high currents without significant power losses. This efficiency not only helps to reduce energy consumption but also allows for the design of smaller and more compact electronic devices. Reliability Reliability is crucial in any electronic device, and DMOS high speed switches have proven to be highly reliable over the years. These switches are designed to withstand harsh environments and high operating temperatures, making them suitable for use in a wide range of applications. This reliability ensures that electronic devices equipped with DMOS high speed switches can perform consistently and without failure. Versatility One of the most significant advantages of DMOS high speed switches is their versatility. These switches can be used in a variety of electronic applications, from low voltage to high voltage applications. They are also suitable for both AC and DC circuits, making them a popular choice among electronic design engineers. Innovation The constant need for innovation in the electronic industry drives the development of new technologies, and DMOS high speed switches play a crucial role in this process. These switches provide designers with more options and flexibility when it comes to creating innovative electronic devices. With their high-speed performance and efficiency, DMOS switches enable the development of cutting-edge products such as smartphones, laptops, and electric vehicles. Sustainable Development In recent years, there has been an increasing focus on sustainable development in the electronic industry. DMOS high speed switches contribute to this cause by being energy-efficient and environmentally friendly. With reduced power consumption and fewer emissions, these switches help to minimize the overall environmental impact of electronic devices. This makes them a vital component in the development of more sustainable and eco-friendly technology. Conclusion In conclusion, DMOS high speed switches are a crucial component in modern electronic devices. With their reliability, versatility, innovative capabilities, and contribution to sustainable development, these switches play a significant role in driving the advancement of the electronic industry. As technology continues to evolve, it is certain that DMOS high speed switches will continue to play a crucial role in shaping the future of electronic devices. So, it is important for electronic design engineers to stay updated with the latest developments and advancements in DMOS high speed switch technology to unlock its full potential in their designs. With this powerful tool at their disposal, designers can push the boundaries of what is possible in the electronic world and create truly groundbreaking products. So, let's embrace DMOS high speed switches and continue to innovate and improve the way we interact with technology. The possibilities are endless! So go ahead and explore all that DMOS has to offer for your next electronic design project.

< Back LSK389 App Note Introduction The LSK389 is the industry’s lowest noise Dual N-Channel JFET, 100% tested, guaranteed to meet 1/f and broadband noise specifications, while eliminating burst (RTN or popcorn) noise entirely. The product displays high transconductance and very good matching. It is the JFET of choice for low noise applications, especially those requiring a differential amplifier input stage. Read More

< Back LSK489 App Note Introduction For circuits designed to work with high impedance sources, ranging from electrometers to microphone preamplifiers, the use of a low-noise, high-impedance device between the input and the op amp is needed in order to optimize performance. At first glance, one of Linear Systems’ most popular parts, the LSK389 ultra-low-noise dual JFET would appear to be a good choice for such an application. The part’s high input impedance (1 TΩ) and low noise (1 nV/√Hz at 1kHz and 2mA drain current) enables power transfer while adding almost no noise to the signal. But further examination of the LSK389’s specification shows an input capacitance of over 20pF. This will cause intermodulation distortion as the circuit’s input signal increases in frequency if the source impedance is high. This is because the JFET junction capacitances are nonlinear. This will be especially the case where common source amplifier arrangements allow the Miller effect to multiply the effective value of the gate-drain capacitance. Further, the LSK389’s input impedance will fall to a lower value as the frequency increases relative to a part with lower input capacitance. A better design choice is Linear Systems’ new offering, the LSK489. Though the LSK489 has slightly higher noise (1.5 nV/√Hz vs. 1.0 nV/√Hz) its much lower input capacitance of only 4pF means that it will maintain its high input impedance as the frequency of the input signal rises. More importantly, using the lower-capacitance LSK489 will create a circuit that is much less susceptible to intermodulation distortion than one using the LSK389. The LSK489’s lower gate-to-drain capacitance enables more effective, elegant audio circuit designs. The relatively high capacitance of the LSK389 often requires designers to use a cascode circuit to provide the ability to handle higher bandwidths without intermodulation distortion. The cascode does this by eliminating the Miller effect that can multiply the effective gate-drain capacitance and its associated nonlinear effects. However, the cascode adds complexity and noise contributed by the cascode transistors. The LSK489 is an N-channel dual low-noise, low-capacitance, tightly matched monolithic field effect transistor. It features: • 3ms transconductance at 2mA drain current • 1000 GΩ input impedance • 60V breakdown voltage • gate-drain capacitance of only 1.5pF • 4pF input capacitance • 1.5 nV/√Hz noise at 1kHz • best low-noise/low-capacitance combination in the industry • lowest input capacitance per unit gate length in the industry • lowest noise for a given gate length in the industry • tight Vgs matching at operating bias Read More

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LS844 Series ULTRA-LOW NOISE, LOW-DRIFT, MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER The LS844 Series Ultra-Low Noise, Low-Drift, Monolithic Dual N-Channel JFET Amplifier is a pin-for-pin replacement for the Fairchild, Motorola, National and Siliconix-Vishay part series. Available in the TO-71 6L, TO-78 6L, PDIP 8L and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LS844 TO-71 6L RoHS LS845 TO-71 6L RoHS LS844 TO-78 6L RoHS LS845 TO-78 6L RoHS LS844 PDIP 8L RoHS LS845 PDIP 8L RoHS LS844 SOIC 8L RoHS LS845 SOIC 8L RoHS LS844 Die LS845 Die Datasheet Spice Model Application Notes

MONOLITHIC DUAL, NPN TRANSISTOR < Back IT120 Series MONOLITHIC DUAL, NPN TRANSISTOR The IT120 Series Monolithic Dual, NPN Transistor is a direct replacement for the Intersil IT120 Series. It is ideal for Small Signal Transistor Amplifier & Switching Applications. It is available the in TO-71 6L RoHS, TO-78 6L RoHS, PDIP 8L ROHS and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information: All Part Numbers within this Product Series IT120A PDIP 8L RoHS IT120 PDIP 8L RoHS IT121 PDIP 8L RoHS IT122 PDIP 8L RoHS IT120A SOIC 8L RoHS IT120 SOIC 8L RoHS IT121 SOIC 8L RoHS IT122 SOIC 8L RoHS IT120A Die IT120 Die IT121 Die IT122 Die Datasheet Spice Model Application Notes

SINGLE, LOW NOISE, LOW CAPACITANCE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER < Back LSK170 Series SINGLE, LOW NOISE, LOW CAPACITANCE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER The LSK170 Single, Low Noise, Low Capacitance, High Input Impedance, N-Channel JFET Amplifier is a direct replacement for Toshiba 2SK170. It is ideal for Ultra Low Noise Audio/Acoustic Applications. Available in the TO-92 3L RoHS, SOT-23 3L RoHS and SOT-89 3L RoHS package, as well as in die form. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LSK170A TO-92 3L RoHS LSK170B TO-92 3L RoHS LSK170C TO-92 3L RoHS LSK170D TO-92 3L RoHS LSK170A SOT-23 3L RoHS LSK170B SOT-23 3L RoHS LSK170C SOT-23 3L RoHS LSK170D SOT-23 3L RoHS LSK170A SOT-89 3L RoHS LSK170B SOT-89 3L RoHS LSK170C SOT-89 3L RoHS LSK170D SOT-89 3L RoHS LSK170A Die LSK170B Die LSK170C Die LSK170D Die Datasheet Spice Model Application Notes

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LS830 Series ULTRA-LOW LEAKAGE, LOW DRIFT, MONOLITHIC DUAL N-CHANNEL JFET The LS830 Series of Ultra-Low Leakage, Low Drift, Monolithic Dual N-Channel JFETs is a pin-for-pin replacement for the Fairchild, Motorola, National and Siliconix-Vishay part series. Available in the TO-71 6L, TO-78 6L, PDIP 8L and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LS830 TO-71 6L RoHS LS831 TO-71 6L RoHS LS832 TO-71 6L RoHS LS833 TO-71 6L RoHS LS830 TO-78 6L RoHS LS831 TO-78 6L RoHS LS832 TO-78 6L RoHS LS833 TO-78 6L RoHS LS830 PDIP 8L RoHS LS831 PDIP 8L RoHS LS832 PDIP 8L RoHS LS833 PDIP 8L RoHS LS830 SOIC 8L RoHS LS831 SOIC 8L RoHS LS832 SOIC 8L RoHS LS833 SOIC 8L RoHS LS831 Die LS832 Die LS833 Die Datasheet Spice Model Application Notes

SINGLE, LOW-LEAKAGE PICO AMP DIODES DFN PACKAGE < Back PAD Series DFN Package PAD-DFN SERIES MINIATURE/NON MAGNETIC 8-PIN DFN PACKAGE LOW LEAKAGE DIODE The PAD Series Ultra-Low Leakage, Protection Diode is a direct replacement for the Siliconix-Vishay part series. It is ideal for Pico Amp, Ultra-Low Leakage, Protection Diode Applications. This part series is available in the mineature DFN 8L RoHS package, as well as the TO-72 3L RoHS, TO-92 2L RoHS and SOT-23 3L RoHS and bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: PAD1 DFN 8L RoHS PAD2 DFN 8L RoHS PAD5 DFN 8L RoHS PAD10 DFN 8L RoHS PAD20 DFN 8L RoHS PAD50 DFN 8L RoHS PAD100 DFN 8L RoHS PAD1 TO-72 3L RoHS PAD2 TO-72 3L RoHS PAD5 TO-72 3L RoHS PAD10 TO-72 3L RoHS PAD20 TO-72 3L RoHS PAD50 TO-72 3L RoHS PAD100 TO-72 3L RoHS JPAD1 TO-92 2L RoHS JPAD2 TO-92 2L RoHS JPAD5 TO-92 2L RoHS JPAD10 TO-92 2L RoHS JPAD20 TO-92 2L RoHS JPAD50 TO-92 2L RoHS JPAD100 TO-92 2L RoHS PAD1 SOT-23 3L RoHS PAD2 SOT-23 3L RoHS PAD5 SOT-23 3L RoHS PAD10 SOT-23 3L RoHS PAD20 SOT-23 3L RoHS PAD50 SOT-23 3L RoHS PAD100 SOT-23 3L RoHS PAD1 Die PAD2 Die PAD5 Die PAD10 Die PAD20 Die PAD50 Die PAD100 Die Datasheet Spice Model Application Notes

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LS5911 Series WIDEBAND, HIGH GAIN, MONOLITHIC DUAL, N-CHANNEL JFET The LS5911 Series is a Wideband, High Gain, Monolithic Dual, N-Channel JFET. These parts are pin-for-pin replacements for Fairchild, Motorola, National, and Siliconix-Vishay 2N5911 Series. All dual devices are available in TO-71 6L, TO-78 7L, PDIP 8L, SOIC 8L and SOT-23 6L packages, as well as in die form. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LS5911 TO-71 6L RoHS LS5912 TO-71 6L RoHS LS5912C TO-71 6L RoHS 2N5911 TO-71 6L RoHS 2N5912 TO-71 6L RoHS 2N5912C TO-71 6L RoHS LS5911 TO-78 7L RoHS LS5912 TO-78 7L RoHS LS5912C TO-78 7L RoHS 2N5911 TO-78 7L RoHS 2N5912 TO-78 7L RoHS 2N5912C TO-78 7L RoHS LS5911 PDIP 8L RoHS LS5912 PDIP 8L RoHS LS5912C PDIP 8L RoHS LS5911 SOIC 8L RoHS LS5912 SOIC 8L RoHS LS5912C SOIC 8L RoHS LS5911 SOT-23 6L RoHS LS5912 SOT-23 6L RoHS LS5912C SOT-23 6L RoHS LS5911 Die LS5912 Die LS5912C Die Datasheet Spice Model Application Notes

< Back Jaime Cook: VP of Operations & Market Development Linear Systems Nov 21, 2024 Jaime Cook Appointed VP of Operations & Market Development at Linear Systems, Inc. Fremont, CA – October 1, 2024 – Linear Integrated Systems, Inc. is pleased to announce the appointment of Jaime L. Cook as Vice President of Operations and Market Development. In this pivotal role, Jaime will oversee all operational functions and spearhead market development initiatives. Jaime Cook has been a valued member of the Linear Systems team since 2009. Before stepping into her new role, Jaime served as Sales Manager, Director of Sales, and VP of Operations, gaining extensive experience across multiple facets of the company. Jaime brings a wealth of knowledge and expertise to her position as VP of Operations & Market Development. She holds bachelor's degrees in Real Estate and Land Use, as well as Strategic Management. Her education, certifications, and work experience have honed her skills in strategic planning, negotiation, and relationship building—qualities that significantly contribute to her expanded responsibilities at Linear Systems. “I’m incredibly proud to have built my career at Linear Systems and to be part of a team of exceptional individuals committed to producing the industry’s best specialty linear semiconductors while consistently meeting the highest standards of performance and reliability,” said Cook. “I am excited to expand my responsibilities, drive operational excellence, and lead efforts to explore new market opportunities.” Cindy L. Johnson, CEO of Linear Systems, stated, “Jaime’s leadership in operations and market development is pivotal as we aim to expand our product reach and strengthen customer relationships. Her strategic vision is vital to our mission of delivering ultra-reliable JFETs and other components that enable our clients to achieve outstanding performance in their designs.” Founded 37 years ago by John M. Hall, Cindy L. Johnson, and John H. Hall, Linear Integrated Systems, Inc. is a privately held designer and manufacturer of small-signal discrete semiconductors based in Fremont, CA. John H. Hall, a co-founder of Intersil and the founder of Micro Power Systems, brought significant expertise and innovation to the company. Linear Systems offers a diverse product line, including Dual JFET Amplifiers , Single JFET Amplifiers , JFET Switches , DMOS High Speed Switches , Low Leakage Diodes , Current Regulating Diodes , Bipolar Transistors , MOSFETs , Voltage Controlled Resistors and BIFET Amplifiers . Visit www.linearsystems.com to download our 2024 Data Book , Cross Reference Guide , datasheets, SPICE models, application notes , and more. Stay connected and join our growing LinkedIn community for updates and insights. You can also follow us on YouTube , Facebook , Instagram and X .

< Back Burning Amp Festival Linear Systems Mar 17, 2023 Burning Amp Festival - A DIY Audio Gathering Burning Amp Festival Every year Linear Systems sponsors one of the audio industry’s best-regarded DIY amplifier design, display and discussion events, Burning Amp Festival. Here audio enthusiasts enjoy sharing their displays and demonstrations of incredible audio projects, and talk-shop with renowned industry leaders. Speakers such as audio legend Nelson Pass, take the stage to discuss recent projects and engage with the crowd in a Q&A session. It’s no wonder Burning Amp continually attracts audio DIYers from around the world! Burning Amp typically takes place in late October/early November. In past years the event has been held at various locations throughout the Bay Area, such as Fort Mason in San Francisco, CA. Due to COVID-19, this year’s event is cancelled, but we look forward with great anticipation to the Burning Amp Festival 2021.Interested in presentations from past years speakers? Visit our YouTube Channel: www.youtube.com/user/LinearSystemsUSA

< Back Consider the JFET Introduction Though not as well known as the bipolar transistor or op amp, this long-established transistor still excels in where you need to optimize circuit behavior, such as for lowest noise. Many engineers are somewhat familiar with discrete bipolar transistors, such as the venerable 2N2222. They are also comfortable with the MOSFET (metal-oxide semiconductor field-effect transistor) as a discrete device for amplifying analog signals and switching power signals, as well as its role as the key digital structural element in large-scale ICs. But alongside these devices is the JFET (junction field-effect transistor), which was developed soon after the bipolar transistor. To many designers, the JFET is the nearly ideal three-terminal solid-state device, and its operation and parameters are analogous to the vacuum-tube triode. The difference is that the JFET is, of course, a low-voltage, much-more efficient device, although it can't deliver the power that a vacuum tube can. For applications which require extremely low noise, the JFET is often offers superior performance compared to any other discrete device, as well as op amps. Read More