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High gain microphone preamplifier electronic project
A very simple high gain microphone preamplifier electronic project can be designed using this circuit diagram .
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 resistance are usually similar in value (2 to 5k) for most applications , so this ratio can be taken as unity .
Electronic Circuits:
Circuit Diagram:
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Resistor (Power) and Current in ??mA
You can use both 1/4 or