Signal amplitude adjustment to improve resolver-to-digital converter performance

A gain control system to control signal mismatch between a resolver and a resolver-to-digital converter (RDC), comprising:

• an amplitude detector to detect an amplitude of resolver input signals received by the RDC from the resolver,
• a pair of comparators, each comparing the detected amplitude to a respective one of a high and low threshold,
• a counter, responsive to outputs from the comparators, to increment or decrement a gain value count, and
• a control signal generator to output a gain control signal based on the gain value count.

A gain control method to control signal mismatch between a resolver and a resolver-to-digital converter (RDC) in a resolver system, comprising:

• generating a monitor signal from a pair of input signals from the resolver and a second pair of locally synthesized frequency signals,
• determining an amplitude of the input signals from the monitor signal,
• comparing the detected amplitude to a high threshold and to a low threshold,
• generating a gain control signal based on the comparisons, and
• outputting the gain control signal to a circuit of the resolver system.

A gain control method to control signal mismatch between a resolver and a resolver-to-digital converter (RDC) in a resolver system, comprising:

• detecting an amplitude of resolver input signals received by the RDC from the resolver,
• comparing the detected amplitude to a high threshold and to a low threshold,
• when the detected amplitude exceeds the high threshold, decrementing a gain value count,
• when the detected amplitude is less than the low threshold, incrementing the gain value count,
• generating a gain control signal based on the gain value count, and
• outputting the gain control signal to a circuit of the resolver system.