Apparatus and method of rectifying resolver output signal

An apparatus for rectifying a resolver output signal, comprising:

• a resolver configured to receive an excitation signal and to output a resolver output signal based on the excitation signal, the excitation signal indicating a position of a rotor of a motor;
• a microprocessor configured to receive a reference rectification signal generated by rectification of the excitation signal and to output a delay signal by delaying the reference rectification signal according to a preset value;
• and
• a delay amount detection circuit configured to receive a reference excitation signal generated by rectification of the resolver output signal, to receive the delay signal from the microprocessor, to compare the reference excitation signal with the delay signal, and to output a phase difference detection signal and a delay amount excess/shortage signal to the microprocessor,
• wherein the microprocessor includes a switching amplification circuit configured to detect a delay amount of the resolver output signal based on the phase difference detection signal, to output a rectification signal based on the delay amount, to receive the rectification signal, to rectify the resolver output signal by performing a switching operation based on the rectification signal, and to output a compensation signal.