High gain microphone preamplifier electronic project


Posted on Feb 6, 2014

This microphone preamplifier electronic project is based on transistors and is capable of about 70dB or more gain at audio frequencies. Gain of this circuit is approximately equal to the product of the hfe of the both transistors times in the ratio of the load resistance to the input resistance of the preamp. As an approximation, these resistan


High gain microphone preamplifier electronic project
Click here to download the full size of the above Circuit.

ce are usually similar in value (2 to 5k) for most applications, so this ratio can be taken as unity.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Thermometer with 10 LED scale
    LED Chaser
    Basic Multimeter Circuit
    MOSFET + Relay to Control a Motor
    KA7OEI GPS
    Current Mirror for LEDs
    Zero rectifier regulator schematic
    Cool gradually dimming light switches
    Double five-band equalizer circuit



    Top