Patent ID: 7579889

Claim:
A phase angle generator generating an output signal in an arbitrary phase, comprising: a first quadrature generator receiving a first input signal and generating a first phase-changing signal; a plurality of delay cells receiving the first input signal and generating their respective delay signals; a voltage controller receiving the first phase-changing signal and the respective delay signals for generating a plurality of control voltages for the respective delay cells, wherein the plurality of delay cells receive the respective control voltages and control a respective delay time of the respective delay signal accordingly; a first multiplexer receiving the plurality of delay signals and selecting one of the plurality of delay signals for generating a second input signal; a second quadrature generator receiving the second input signal and generating a plurality of second phase-changing signals; and a second multiplexer receiving the plurality of second phase-changing signals and selecting one of the plurality of second phase-changing signals for generating the output signal.