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Founded in 1987 by John H. Hall, Linear Integrated Systems has a rich history rooted in innovation and precision. Building on decades of expertise honed at industry leaders like Amelco, Union Carbide, Intersil, and Micro Power Systems, we craft the highest performance semiconductors in the industry.
Our products—including ultra-low-noise JFETs, high-speed lateral DMOS switches, bipolar transistors, BIFET amplifiers, and more—empower our customers to build world-class solutions in audio, medical, industrial, military, and beyond.
At Linear Systems, we’re passionate about what we do—and we love sharing that passion in our blog. From technical deep dives and product releases to newsletters and industry insights, our blog keeps you up to date with everything happening in the world of high-performance semiconductors.
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Introducing the LSBF862: A Next-Generation Low-Noise JFET for High-Precision Analog Designs
When NXP discontinued the BF862, engineers around the world were left searching for a true low-noise replacement that preserved performance, ensured long-term supply continuity, and avoided expensive redesigns. Linear Integrated Systems is proud to introduce the LSBF862 , a precision N-channel JFET engineered not just to replace the BF862 — but to outperform it across noise, breakdown voltage, and customizability. 👉 Read the full press release here: https://www.prnewswire.c
JC - Linear Systems
2 days ago2 min read
Towed Array Designers — This JFET Was Built for You
When you’re trying to detect tiny signals at the bottom of the ocean, the front end of your signal chain can make or break the entire system. Towed arrays, hull-mounted sonars, and underwater acoustic modems all share one unforgiving requirement: you don’t get a second chance at the data . Once noise, drift, or mismatch pollutes a hydrophone’s output, there’s no DSP magic that can fully restore what’s been lost. That’s why so many designers working with hydrophones and piezoe
JC - Linear Systems
Nov 203 min read
Comparing JFETs in Small Signal Applications
For more than three decades, designers have turned to JFETs for their ability to deliver precision, low-noise performance in sensitive analog circuits. Unlike bipolar junction transistors (BJTs), which operate as current-controlled devices, JFETs function as voltage-controlled current sources , giving designers a unique balance of flexibility, stability, and ultra-high input impedance. Why JFETs Matter JFETs provide giga-ohm-level input impedances and picoamp-level input leak
JC - Linear Systems
Nov 122 min read
Quad-Channel Switching. Less Than 1 ns. No Compromise.
When speed and precision matter, our SD5400CY monolithic quad switch delivers unmatched performance for Automated Test Equipment (ATE) and other high-speed analog switching applications. Built on Linear Systems’ proprietary DMOS process , the SD5400CY integrates four individual enhancement-mode MOSFETs on a common substrate, achieving exceptional channel isolation , low crosstalk (-107 dB) , and ultra-fast switching times — tON = 1 ns max . Why It Stands Out ⚡ Blazing spe
JC - Linear Systems
Nov 61 min read
Unlocking Ultra-Low Noise Amplifier Performance with the LSK389 Dual
At Linear Systems, we’ve long been committed to helping designers push the limits of analog performance — especially in low-noise, high-impedance applications such as sensor front-ends, microphone preamps, instrumentation amplifiers and more. That’s why we are proud to present the application note on our dual monolithic JFET, the LSK389.In this article, we’ll walk you through what makes the LSK389 a standout device, how it works in real-world circuits, and how you can integr
JC - Linear Systems
Oct 293 min read
LS844: Low-Noise Dual JFET for High-Performance Audio & Precision Analog
When designing high-impedance, low-noise front ends—whether for audio preamps, instrumentation nodes, or sensor interfaces—the input stage is everything. The LS844 Dual N-Channel JFET from Linear Integrated Systems is engineered specifically for these precision applications, offering low noise , low input capacitance , and tight device matching on a single, monolithic die. This combination allows designers to extract maximum signal fidelity across a wide range of applicati
JC - Linear Systems
Oct 242 min read
Matched Precision: Linear Systems’ Bipolar Transistors for Analog Performance
In an era dominated by FETs and IC-level integration, it’s easy to forget just how powerful a well-designed bipolar transistor can be....
JC - Linear Systems
Oct 83 min read
Nelson Pass & Linear Systems: The B1 Buffer Preamp
B1 Buffered Passive Preamp Few names in audio design inspire as much respect as Nelson Pass . For decades, Nelson has pushed the...
JC - Linear Systems
Sep 253 min read
Precision Current Regulation Made Simple: J500 & SST500 Diodes
When designing circuits for test instrumentation , medical electronics , or any system where stable, low current is crucial, the choice...
JC - Linear Systems
Sep 232 min read
Listening to the Faintest Signals: Ultra-Low Noise JFETs in Sensor Front-Ends
Detecting the almost undetectable takes extraordinary precision. In fields from seismic monitoring to medical diagnostics, engineers...
JC - Linear Systems
Sep 182 min read
Designing for Picoamps: Modern Applications of Linear Systems’ Low Leakage Diodes
Precision Protection for Precision Circuits In modern high-impedance analog systems, every picoamp counts . When your front end is...
JC - Linear Systems
Sep 152 min read
A Quiet Photodiode TIA with Linear Systems’ JFETs
When it comes to photodiode front ends, noise and stability are the real challenges. Photodiode capacitance can destabilize feedback...
JC - Linear Systems
Sep 102 min read
Linear Systems DMOS High-Speed Switches: Precision Switching for Demanding Applications
High-speed analog switching is essential in systems where signal integrity, bandwidth, and reliability cannot be compromised. Linear...
JC - Linear Systems
Sep 82 min read
Op-Amp Cookbook Part 4 Meets Modern Innovation: Precision Instrumentation and Test Circuits Reimagined
Revisiting Ray Marston’s Classic Analog Designs Through a Modern Lens In Part 4 of Ray Marston’s Op-Amp Cookbook , the spotlight turns to...
JC - Linear Systems
Sep 42 min read
Powering the Future of Underwater Acoustics with Precision Components
From ocean exploration to naval defense, underwater acoustics plays a critical role in how we detect, communicate, and navigate beneath...
JC - Linear Systems
Sep 42 min read
Keeping Analog Oscillating: Op-Amp Cookbook Part 3 Meets Modern Innovation
In our previous blog, we explored the practical side of Part 2—linear amplifiers and active filters—and how modern devices like the LSK389...
JC - Linear Systems
Aug 282 min read
LSK170 Series – Ultra-Low Noise JFETs for Precision Design
Analog Performance Without Compromise In today’s world of high-resolution audio, sensitive instrumentation, and precision sensing, one...
JC - Linear Systems
Aug 251 min read
Building on Analog Foundations: Op-Amp Cookbook Part 2 Meets Modern Precision
In our last blog, we revisited Ray Marston’s classic Op-Amp Cookbook – Part 1 and explored how its timeless design principles continue...
JC - Linear Systems
Aug 222 min read
Bridging Analog Foundations with Precision: Op-Amp Cookbook Meets LSK389 Excellence
For our FET Friday post we are revisiting the timeless Op‑Amp Cookbook, Part 1 by Ray Marston, which reminds us how fundamental op‑amp...
JC - Linear Systems
Aug 152 min read
Boosting Performance with Low-Noise Cascode Structures
Designing ultra-low-noise circuits often means balancing trade-offs between gain, distortion, and complexity. One proven technique for...
JC - Linear Systems
Aug 51 min read
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