Microphone Amplifier using KM551UD2

Microphone AmplifierThe amplifier is assembled on operational amplifier KM551UD2.The amplifier is powered by a dual supply voltage of 15 volts. The diagram shows one channel of amplification, and is given in parentheses the numbering of the findings for the second channel.

Key Features

Supply voltage
: + / -15V
Input Voltage
: 1mV
Output Voltage
: 250mV
: 20 … 20000Hz
S / N ratio
: 60dB


Tags: KM551UD2 microphone amplifier microphone amplifier circuit small microphone amplifier

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