Safety test circuit and method

A safety test circuit, comprising:

• a pulse test control circuit configured to receive a zero-vector signal and to generate a pulse test signal when the zero-vector signal is active;
• a first safety channel, comprising:
• a first enable circuit configured to receive the pulse test signal and a first safety input signal, and to generate a first enable signal which is active only when both the pulse test signal and the first safety input signal are inactive;
• and
• a first power signal gate configured to receive a first plurality of power control signals and to transfer the first plurality of power control signals to a power module only when the first enable signal is active;
• and
• a second safety channel, comprising:
• a second enable circuit configured to receive the pulse test signal and a second safety input signal, and to generate a second enable signal which is active only when both the pulse test signal and the second safety input signal are inactive;
• and
• a second power signal gate configured to receive a second plurality of power control signals and to transfer the second plurality of power control signals to the power module only when the second enable signal is active.