The invention provides a carrier phase control circuit which can eliminate a phase intercept fluctuation so that, when the carrier phase control circuit is applied to a very high speed modem having a communication speed of, for example, 28.8 kbps, occurrence of a communication error can be suppressed...http://www.google.com/patents/US5757865?utm_source=gb-gplus-sharePatent US5757865 - Carrier phase control circuit
