Method and apparatus for correcting signal dependent duty cycle errors in amplitude shift keying receivers

An apparatus for demodulating an Amplitude Shift Keying (ASK) encoded signal is provided. The apparatus comprises a peak detector, a first comparator, a threshold generator, a delay circuit, and a second comparator. The peak detector is configured to detect a peak voltage, and the first comparator is coupled to the peak detector and receives a first threshold voltage. The threshold generator is coupled to the peak detector and is configured to generate a second threshold voltage that is proportional to peak voltage. The delay circuit is coupled to the first comparator, and the second comparator is coupled to the delay circuit and that is coupled to the threshold generator so as to receive the second threshold voltage.