Dual Channel HV Amplifier with Phase Inverter

Dual Channel HV Amplifier with Phase Inverter


The Pendulum Instruments Dual Channel High Voltage Linear Amplifier A800DI contains two independent A800 amplifiers that share common ground reference and power supply. It features also a low voltage phase inverter that inverts the signal applied to the input of channel 1. The resulting signal can then be connected to the input of channel 2 by means of a short BNC cable (supplied).

As a result the two outputs operate in counter-phase. Connecting a load between the outputs effectively doubles the amplitude range. Please note that the load cannot have any connection to ground. Also, in order to see the signal over the load you must use two oscilloscope probes and use the math function.

The phase inverter is present in models A400DI and A800DI. The idea is illustrated below:

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