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An All-JFET Amplifier: Exploring Modern JFETs Circuits ...
https://audioxpress.com/article/an-all-jfet-amplifier-exploring-modern-jfets-circuits
Audio Amplifiers - JFET - InterFET
https://www.interfet.com/audio-amplifiers/
JFET-MOSFET Power Amplifier | mosfetaudio-didik.com
https://mosfetaudio-didik.com/jfet-mosfet-power-amplifier/
The Power Amplifier “MP50Di” using JFET (2SK170) in the front end and HITACHI/Renesas Lateral Mosfet (2SK1058/2SJ162) on the amplifier tail end.
JFETs: The New Frontier, Part 1 | audioXpress
https://audioxpress.com/article/JFETs-The-New-Frontier-Part-1
You can use the JFET as a voltage-controlled resistor or a low-level switch in the triode region, and as an amplifier in the pentode region. As you see, the Nchannel JFET conducts maximum current I DSS with V GS = 0V.
How to design JFET as an amplifier? - Circuit and ...
https://electronicscoach.com/jfet-as-an-amplifier.html
Using JFET as an amplifier To understand, how a JFET works as an amplifier, first we should be well aware of the fact that how does an amplifier work. It takes an input signal which is weak in magnitude and amplifies it by its internal circuit. The weak signal applied at its input circuit causes a large change in its output circuit.
Simple JFET Audio Preamps - Ciphers By Ritter
http://www.ciphersbyritter.com/RADELECT/PREJFET/JFETPRE.HTM
This is a very common arrangement in feedback audio amplifiers. two resistors. The low-frequency roll-off is set by the filter formed by the second resistor and the capacitor. The second resistor should be small, because the Johnson noise is essentially in series with the input signal, which means the
First Watt J2 Stereo Power Amplifier; Silver; JFET; Nelson ...
https://tmraudio.com/components/power-amplifiers/first-watt-j2-stereo-power-amplifier-silver-jfet-nelson-pass/
Other Notes: "The J2 power amplifier is simple, clean, and measures astonishingly well. It achieves a sound which is warm and relaxed, combining precision and detail without sterility. With a pair of sensibly efficient loudspeakers, it will give you a toe-tapping experience that other solid state amplifiers do not.
JFETs and MOSFETs
https://www.sound-au.com/articles/fet-applications.htm
High Input Impedance Amplifier Low-Noise Amplifier (but it's now hard to find genuine low-noise JFETs) Differential Amplifier Constant Current Source Analog Switch or Gate Voltage Controlled Resistor These applications will be covered in more detail below.
Audio Compression Amplifier /AGC - ElectroSchematics.com
https://www.electroschematics.com/audio-compressor-agc/
This is an audio compressor/AGC (automatic gain control) with an astonishing 75db input voltage range. A P-Channel JFET is used as a variable resistance element that is applied as a variable attenuator. Distortion is minimized by keeping the signal voltage across the JFET extremely low (1.3mV).
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