AD LSK LSK Demodulator Circuit Using A/D Converter and Bit Comparator for Wireless Power and Data Transfer System

摘要

Disclosed is an LSK demodulator circuit using an AD converter and a bit comparator for a wireless power and data transfer system. According to the present invention, there is provided an LSK demodulator circuit using an AD converter and a bit comparator for the wireless power and data transfer system, which includes: an AD converter for receiving a voltage-divided waveform which passes through an envelope detector and converting the voltage-divided waveform into a digital signal; a delay buffer for receiving the digital signal converted by the AD converter and generating a delayed digital signal; a bit comparator for comparing the magnitudes of the digital signal converted through the AD converter with the delayed digital signal through the delay buffer with each other; and an SR latch for outputting a set or reset signal according to a comparison result of the bit comparator. Therefore, the AD converter and the bit comparator are used to remove an external RC filter and restore the data without data loss due to an initial delay time.