Patent ID: 6696897
Filing Date: 2004-02-24
Classification: H03B,H03K

Abstract:
A method for controlling the phase of a voltage controlled oscillator (VCO) output, the method comprising:accenting a first VCO output (I0); accenting a second VCO output (I1), differentiated approximately 90 decrees from the first VCO output; accepting a third VCO output (Q0), differentiated approximately 90 degrees from the second VCO output; accepting a fourth VCO output (Q1), differentiated approximately 90 degrees from the third VCO output; selecting one of the plurality of VCO outputs; finely modifying the phase of the selected VCO output in the range between +45 and âˆ’45 degrees by: amplifying the selected VCO output in parallel, generating amplified signals differentiated by phase; and, differentially enabling the amplified signals; and, supplying the phase modified VCO output.