Norton high voltage inverting amplifier

Posted on Feb 4, 2014

This circuit is an inverting amplifier with an output voltage swing from essentially 0 to +300 V. Any transistor can be used for Q1, provided that the breakdown voltage is greater than 300 V (because the full high voltage will be applied across Q1). Biasing resistor R3 is used to center the transfer characteristic, and the gain is set by the ratio

Norton high voltage inverting amplifier
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of R2/R1. Load RL can be increased to reduce the high-voltage current drain, if desired.

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