mini mosfet audio amplifier


Posted on Feb 6, 2014

This project was a sort of challenge: designing an audio amplifier capable of delivering a decent output power with a minimum parts count, without sacrificing quality. The Power Amplifier section employs only three transistors and a handful of resistors and capacitors in a shunt feedback configuration but can deliver more than 18W into 8 Ohm with


mini mosfet audio amplifier
Click here to download the full size of the above Circuit.

<0. 08% THD @ 1KHz at the onset of clipping (0. 04% @ 1W - 1KHz and 0. 02% @ 1W - 10KHz) and up to 30W into a 4 Ohm load. To obtain such a performance and to ensure overall stability of this very simple circuitry, a suitable regulated dc power supply is mandatory. This is not a snag because it also helps in keeping noise and hum of the preamp to very low levels and guarantees a predictable output power into different load impedances. Finally, as the amplifier requires only a single rail supply, a very good dc voltage regulator capable of supplying more than 2 Amps @ 40V can be implemented with a few parts also.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    12V White LED Driver
    PC Infrared Receiver
    F232 is USB powered
    cmos 4047 power inverter 12vdc
    Tech Toy Hacks
    IR remote control signal receiver using AVR microcontroller
    crystal controlled timebase
    remote_control circuit
    4-input mini Logic Analyzer
    High-performance power supply LM334
    GF2A op amp audio amplifier circuit diagram
    Light control delay circuit 4
    ETl3X220 FM FSK 27 MHz transmitter
    Electronic circuit diagram of frostbite treatment device



    Top