100W Audio Amplifier

Posted on Jun 13, 2012

The circuit works from a symmetrical 40 VDC power supply and draws a maximum current of 2.6 A. The input circuit of the amplifier is a differential amplifier built around Q4 and Q5 that employ DC feedback thus preventing any DC voltage from appearing across the speaker with the usual destructive results. Q11 acts as a current source and ensures that the input stage draws a constant current of 1 mA.

100W Audio Amplifier
Click here to download the full size of the above Circuit.

The signal which appears as a voltage drop across the resistor connected in series with the collector of Q4 is used to drive the DARLINGTON pair Q3, Q2 which together with the constant current source of 7 mA that is Q10, form the driver stage. This stage

Leave Comment

characters left:

New Circuits



Popular Circuits

Univibe - Trem Face and Others
simple frequency counter circuit
ve170 monitor repair with led
Tunnel Diode Relaxation Oscillator
6 Battery Tesla Switch Circuit Mosfet Solid Stat
Display driver circuit digital voltmeter
Transistor time relay circuit
Air humidity measuring circuit 2
DC-coupled multi-stage amplifier circuit a