Driving circuit and driving method

摘要

The present technology relates to a driving circuit and a driving method, in which power loss at the time of switching an FET (Field Effect Transistor) can be reduced with a simple circuit configuration.;A coil constitutes a resonance circuit together with an input capacitance at a gate of the FET. A switch (regeneration switch) turns on or off current flowing in the coil. A DC power source is a power source to replenish the resonance circuit with electric charge and is connected to the gate of the FET. A switch (replenish switch) turns on or off connection between the DC power source and the gate of the FET. The present technology is applicable to, for example, a power source that outputs AC voltage and current by switching operation.

主权项

1. A driving circuit for an FET (Field Effect Transistor), comprising:
a coil constituting a resonance circuit together with an input capacitor at a gate of the FET; a first switch configured to turn on or off current flowing in the coil; a DC power source connected to the gate of the FET through a first resistor, in order to replenish the resonance circuit with electric charge; and a second switch, connected in series with the first resistor, configured to turn on or off connection between the DC power source and the gate of the FET.