Clock recovery circuit for manchester encoded data

Abstract

An input data stream (a manchester encoded data stream which includes a clock signal component and has some jitter) is inputted to a clock extractor for extracting the clock signal component, the clock signal component having missing clock pulses. A delay line oscillator provides the missing clock pulses and outputs a recovered clock signal. The recovered clock signal has a first delay time as a result of inherent delays in the delay line oscillator and the clock extractor. A latch element receives the recovered clock signal and the input data stream, the input data stream being delayed a second delay time, the first delay time and the second delay time being essentially the same. The latch element reclocks the input data stream thereby removing a maximum amount of jitter and removes any distortion of the input data stream.