50W-audio-power-amplifier


Posted on Oct 23, 2012

This audio amplifier design approach employs TMOS Power FETs operating in a complementary common- source configuration. They are biased to cutoff, then turn on very quickly when a signal is applied. The advantage of this approach is that the output stage is very stable from a thermal point of view. U1 is a high slew-rate amp that drives Q3, Q4,and Q6 (operating class AB) providing level transition for the output stage consisting of Q7, QS, Q9,and QlO.


50W-audio-power-amplifier
Click here to download the full size of the above Circuit.

The positive temperature coefficient of the TMOS device enables parallel operation of Q7, QS, and Q9 and provides a higher power complementary device for QlO. These TMOS Power FETs must be driven from a low-source impedance of 100 0, in order to actually obtain high turn-on speeds.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Constant-current-stimulator
    Inrush Current Limiter Circuit
    tda2030a amplifier circuit used in home theaters
    Servo Circuit Controls Sine-Wave Amplitude
    ICL7107 / ICL7106 - Digital Voltmeter
    Water Activated Alarm
    Colpitts oscillator
    VU meter circuit for LM3915 PCB
    Operational Amplifier Voltage Comparator Circuits
    relative field strength meter
    Installation of IFD in Kenwood TM455
    DSpace badge board build Instructions
    Inductance and Capacitance Meter Adapter
    A control two water supply frequency control circuit a
    Current amplifier circuit configuration



    Top