Signal transmission circuit and power conversion apparatus

A signal transmission circuit comprising:

• a first circuit, to which a first signal is input, configured to generate a transmission signal according to a change in a logical value of the first signal, and use a first potential as a reference for an operation;
• a transformer including a first coil to which the transmission signal is input from the first circuit and a second coil inductively coupled to the first coil and configured to output a pair of reception signals;
• and
• a second circuit, to which the pair of reception signals are input from the second coil, configured to generate a second signal by performing comparison with hysteresis with respect to a potential difference between the pair of reception signals, and use a second potential as a reference for an operation,
• wherein
• the second circuit includes a detection circuit configured to perform the comparison and output a result of detecting whether the potential difference exceeds a predetermined range as the second signal, and
• a reset circuit configured to reset an operation of the detection circuit when a logical value of the second signal is maintained in a preset period.