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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  

LEDs with resistor biasing

LEDs with resistor biasing PUBLIC

LEDs are usually found with a resistor in series to select the desired current (and therefore brightness and power consumption).

by CircuitLab | updated May 10, 2017

bias-point   current-limiting   led  

Transistor Amp (current limited)

Transistor Amp (current limited) PUBLIC

by mad_scientist_kyouma | updated November 24, 2014

amplifier   bias-point   common-emitter   transistor  

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  

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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.