Noise generator

Posted on Jul 3, 2012

The zener breakdown of a transistor junction is used as a noise generator. The breakdown mechanism is random and this voltage has a high source impedance. By using the op amp as a high input impedance, high ac gain amplifier, a low impedance, large signal noise source is obtained

Noise generator
Click here to download the full size of the above Circuit.

The 100K potentiometer is used to set the noise level by varying the gain from 40 to 20 dB.

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