MULTIPLE-PHASE-INTERPOLATION LC VOLTAGE-CONTROLLED OSCILLATOR

摘要

A phase interpolation voltage controlled oscillator includes a plurality of n phase shifting cells (A) and n-1 levels of summing cells (S). The phase shifting cells (A) receive a common input signal and each shifts the input signal a different amount than the other phase shifting cells (A). A summing cell (S) of the first level receives and sums the outputs of at least two phase shifting cells (A), and each remaining level of summing cells receives outputs of a previous level of summing cells (S). The last level contains a single summing cell (S) which produces an output signal that is fed back as the common input signal of the phase shifting cells (A).