Electrosurgical generator with half-cycle power regulation

An electrosurgical generator, comprising:

• a power supply configured to output a direct current;
• an energy metering stage including an inductor, a first metering switching element coupled in series to the inductor and a second metering switching element connected in parallel to the inductor, the energy metering stage configured to generate a metered energy packet from the direct current;
• a power converter coupled to the energy metering stage, the power converter including at least one power switching element operated by a power switching waveform, the power converter configured to generate a radio frequency half cycle based on the metered energy packet;
• and
• a controller coupled to the power converter, the controller is configured to modulate the power switching waveform.

A method for controlling an electrosurgical generator, the method comprising:

• generating a direct current at a power supply;
• generating a metered packet at an energy metering stage from the direct current, the energy metering stage including an inductor, a first metering switching element coupled in series to the inductor and a second metering switching element connected in parallel to the inductor;
• and
• generating a radio frequency half cycle based on the metered energy packet at a power converter coupled to the energy metering stage.