Jfet Audio Attenuator

Lab 5 - JFET Circuits II | Instrumentation LAB

https://instrumentationlab.berkeley.edu/Lab5

High Gain JFET Audio Amplifier – Simple Circuit Diagram

https://www.simplecircuitdiagram.com/588-high-gain-jfet-audio-amplifier/

This is a simple high gain JFET audio amplifier circuit. This circuit need very low power but it provides high gain amplifying function. It also called “JFET µ amp”. Here is the circuit : The lower drain current is, the more gain is obtained because …

amplifier - Why does this JFET attenuator distort the ...

https://electronics.stackexchange.com/questions/311434/why-does-this-jfet-attenuator-distort-the-signal-this-way

Why does this JFET attenuator distort the signal this way? Ask Question Asked 4 years, 6 months ago. Active 3 years, 7 months ago. Viewed …

jfet - How can I make a simple voltage-controlled ...

https://electronics.stackexchange.com/questions/84372/how-can-i-make-a-simple-voltage-controlled-attenuator

I understand that JFETs (see the schematics below) aren't all that well-suited to DC operation for thermal issues or something. Gradual drift in the attenuation is okay. My Arduino program only samples the voltages from the wall-adaptor for about 1/10 of a second. As long as the gain doesn't change appreciably over that time span, things are fine.

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).

JFET as volume control - Forum for Electronics

https://www.edaboard.com/threads/jfet-as-volume-control.19890/

bf245 attenuator. The linearity of the JFET can be greatly increased by using a form of feedback. One resistor from the drain to the gate and another from the gate to the external world. Apply the control voltage to the far end of this second resistor. Use the drain and source terminals like a resistor. Siliconix makes special JFETs designed ...

Attenuating a 5V DC waveform - is a JFET the answer? | All ...

https://forum.allaboutcircuits.com/threads/attenuating-a-5v-dc-waveform-is-a-jfet-the-answer.183947/

The circuit you copied already has a negative voltage fed to the gate of the Jfet to control its conduction. The opamp has a positive and negative supply. I simulated your circuit using a resistor as the Jfet. It does not work as an attenuator.

A guide to using FETs for voltage controlled circuits, Part 1

https://www.edn.com/a-guide-to-using-fets-for-voltage-controlled-circuits-part-1/

FET audio attenuator | Electronics Forums

https://www.electronicspoint.com/forums/threads/fet-audio-attenuator.100970/

FET audio attenuator Reply to Thread. Discussion in 'Electronic Design' started by [email protected], Sep 3, 2007. Search Forums; Recent Posts; Scroll to continue with content. Sep 3, 2007 #1. Guest. Somewhere I ran across a circuit diagram for an audio attenuator using

EB-604/410 All-JFET Line Amp Starter Kit - audioXpress

https://audioxpress.com/article/EB-604-410-All-JFET-Line-Amp-Starter-Kit

The Starter kit EB-604/410 line amp is a high-quality, low noise, low-cost all-JFET circuit, with onboard regulators. It is designed to work with 6−20dB gain. For gains up to 12dB, you can use single-matched JFETs (delivered with the kits). For DC stability, I recommend dual monolithic JFETs at 20dB gain.