US Patent 11670487 Bias supply control and data processing

Bias supplies and plasma processing systems are disclosed. One bias supply comprises an output node, a return node, and a switch network and at least one power supply coupled to the output node and the return node. The switch network and the at least one power supply configured, in combination, to apply an asymmetric periodic voltage waveform and provide a corresponding current waveform at the output node relative to the return node. A metrology component is configured to receive and sample voltage and current signals indicative of a full cycle of the periodic voltage waveform and the corresponding current waveform to provide digital representations of a full cycle of the asymmetric periodic voltage waveform and a full cycle of the corresponding current waveform.