System and method for demodulation of resolver outputs

A method of demodulating resolver outputs, the method comprising:

• receiving, from an analog-to-digital converter (ADC), a plurality of ADC outputs, wherein the plurality of ADC outputs are generated based on the resolver outputs;
• rectifying the plurality of ADC outputs, wherein rectifying the plurality of ADC outputs preserves a phase of the plurality of ADC outputs;
• determining, based on the rectified plurality of ADC outputs, demodulated amplitude values corresponding to the resolver outputs;
• and
• generating position outputs based on the demodulated amplitude values.

A system comprising:

• a resolver;
• an analog-to-digital converter (ADC) coupled to the resolver;
• and
• demodulation circuitry coupled to the ADC and configured to generate demodulated resolver outputs, the demodulation circuitry comprising:
• an input terminal coupled to the ADC and configured to receive a plurality of ADC outputs, wherein the plurality of ADC outputs are generated based on resolver outputs;
• a rectifier configured to rectify the plurality of ADC outputs, wherein rectifying the plurality of ADC outputs preserves a phase of the plurality of ADC outputs;
• amplitude determination circuitry configured to determine, based on the rectified plurality of ADC outputs, demodulated amplitude values corresponding to the resolver outputs;
• and
• angle computation circuitry configured to generate position outputs based on the demodulated amplitude values.