Patent ID: 8928331
Filing Date: 2015-01-06
Classification: G01R

Abstract:
1. A diagnostic circuit for connecting to a unit under test having a load and two lines of a sinusoidal source, the diagnostic circuit comprising: a voltage sensing and signal generation device having an input/output and an input; a plurality of terminals including first terminals for connecting to the load and second terminals for connecting to the two lines of the sinusoidal source, one of said first terminals connected to said input/output, and another one of said first terminals connected to said input; a plurality of relays, one of said plurality of relays connected between one of said second terminals and said input/output, and another one of said plurality of relays connected between another one of said second terminals and said input; a D/C voltage source and ground; a first diode pair having a first clamping diode connected between said D/C voltage source and said input/output and a second clamping diode connected between said ground and said input/output; and a second diode pair having a first clamping diode connected between said D/C voltage source and said input and a second clamping diode connected between said ground and said input.