Now showing circuits 1-10 of 10. Sort by

JFET-based electret microphone amplifier

JFET-based electret microphone amplifier PUBLIC

Most electret microphone modules today come with a built-in JFET to help provide a low-impedance output and noise resistance, but these must be biased properly.

by CircuitLab | updated May 10, 2017

amplifier   audio   bias-point   jfet  

JFET PreAmp

JFET PreAmp PUBLIC

by geedeebee | updated January 07, 2014

audio   guitar   jfet   preamp   stompbox  

Jfet Boost Guitar

Jfet Boost Guitar PUBLIC

by havaden | updated September 26, 2013

boost   fx   guitar   jfet   stompbox  

voltage controlled attenuators using Jfets 01

voltage controlled attenuators using Jfets 01 PUBLIC

Voltage controlled attenuators using Jfets. From: http://www.vishay.com/docs/70598/70598.pdf Just for info really ... :)

by signality | updated September 02, 2013

jfet   vca  

JFET Common source amplifier

JFET Common source amplifier PUBLIC

JFET common source amplifier circuit. An NPN BJT transistor is used to provide constant current bias for the JFET. Capacitor C1 is used to provide a path to AC signals, effectively providing a stable...

by Ahmood | updated June 28, 2013

common-source-amplifier   constant-current-source   jfet  

Wien-bridge JFET

Wien-bridge JFET PUBLIC

by cbooman | updated January 17, 2013

agc   feedback-oscillator   gain   jfet   oscillator   wien   wien-bridge  

Differential FET-BJT Amplifier

Differential FET-BJT Amplifier PUBLIC

Stripped down version of "Geophone amplifier".

by anubi | updated May 20, 2012

amplifier   audio   bias-point   bjt   jfet   level-shift  

differential FET/BJT amp 2

differential FET/BJT amp 2 PUBLIC

Differential FET input, single supply, referenced to ground. V6 or R13 sets bias point. Differential in. Differential out. Note Q1, Q2 feed back through Q5E to improve CMRR and stabilize bias over...

by anubi | updated May 20, 2012

amplifier   audio   bjt   differential   jfet  

Geophone Amplifier

Geophone Amplifier PUBLIC

Single-supply voltage. High-impedance differential input referenced to ground. Low impedance differential line-driver output. This circuit would not converge with old JFET model. CircuitLab fixed the...

by anubi | updated May 19, 2012

amplifier   audio   bjt   differential   jfet   level-shift   startup  

Trouble2

Trouble2 PUBLIC

This is a subset of "Trouble 1". This is the core voltage gain and DC bias feedback which would exhibit convergence difficulty on the old FET model. CircuitLab has fixed the model. This circuit now...

by anubi | updated May 18, 2012

amplifier   bjt   convergence   feedback   initial-conditions   jfet   level-shift   startup  

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CircuitLab is an in-browser schematic capture and circuit simulation software tool to help you rapidly design and analyze analog and digital electronics systems.