Patent ID: 7697651

Claim:
A phase lock method for interpolator based receivers comprising: generating a plurality of clocks with equally spaced phases; sampling a signal from a remote transmitter with the plurality of clocks, the sampling being indicative of a phase relationship between the signal and the plurality of clocks; producing a phase-flip signal in response to determining that the phase relationship between the signal and the plurality of clocks is 180 degrees, and providing the phase-flip signal to a multiplexer receiving the plurality of clocks; sending the phase-flip signal to an OR gate and generating a control signal; sending the control signal to a flip-flop of the multiplexer, wherein the flip-flop is adapted to lock the control signal after a first occurrence of the control signal by feeding the control signal from the flip-flop back to the OR gate; and flipping the plurality of clocks in response to receipt of the phase-flip signal in the multiplexer.