Instantaneous phase detecting circuit and clock recovery signal generating circuit incorporated in differential demodulator

Abstract From the Canadian patent

An instantaneous phase detecting circuit for detecting the phase of a digital phase modulation wave signal which includes first and second logic circuits first and, second phase detecting circuits and a third logic circuit. The first and second logic circuits receive the modulation wave signal, the first logic circuit receives a first carrier signal, and a second logic circuit receives a second carrier signal, the phase of the second carrier signal being delayed by a fixed period with respect to the phase of the first carrier signal. The first and second logic circuits generate first and second arithmetic outputs which are received by the first and second phase detecting circuits which …