Electronic circuitry, method, electronic system and non-transitory computer readable medium

A method comprising:

• acquiring a voltage of a first node via a detection circuit including a diode, a cathode side of the diode being connected to one end of a semiconductor switching element and an anode side of the diode being connected to a first node;
• comparing a voltage of the first node and a threshold voltage and generating a first signal;
• suppressing the voltage of the first node in a first period by a first filter based on a control signal indicating on of the semiconductor switching element;
• and
• determining at least one of the threshold voltage and the first period based on the first signal.

An electronic system comprising:

• a plurality of pairs of semiconductor switching elements;
• and
• electronic circuitry corresponding to the plurality of pairs of semiconductor switching elements,
• wherein the electronic circuitry includes
• a detection circuit including a diode, a cathode side of the diode being connected to one end of a semiconductor switching element and an anode side of the diode being connected to a first node;
• a comparator circuit configured to compare a voltage of the first node and a threshold voltage and generate a first signal;
• a first filter configured to suppress the voltage of the first node in a first period based on a control signal indicating turn-on of the semiconductor switching element;
• and
• a control circuit configured to determine at least one of the threshold voltage and the first period based on the first signal, and
• an AC current is generated from a DC voltage by successively switching the pair of the semiconductor switching elements to be simultaneously turned on for at least a partial period of time.

A non-transitory computer readable medium having a computer program stored therein which when executed by a computer, causes the computer to perform process comprising:

• supplying a control signal indicating turn-on of a semiconductor switching element to the semiconductor switching element;
• receiving a first signal from a comparator circuit configured to compare a voltage of a first node connected to an anode side of a diode, a cathode side of the diode being connected to one end of the semiconductor switching element, and a threshold voltage and generate the first signal;
• and
• determining, based on the first signal, at least one of
• the threshold voltage and
• a first period during which a first filter connected between the first node and the other end of the semiconductor switching element suppresses the voltage of the first node based on the control signal.