Patent ID: 6218908
Filing Date: 2001-04-17
Classification: H03L,H04B

Abstract:
A coupled oscillator arrangement comprising first and second VCOs (voltage controlled oscillators), and a bi-directional interconnect which injection locks the first and second VCOs to each other;wherein each VCO has an output, and wherein the bi-directional interconnect injects a first signal representative of an output signal of the first VCO to the output of the second VCO and injects a second signal representative of an output signal of the second VCO to the output of the first VCO;wherein the bi-directional interconnect comprises a first directional coupler into which is coupled a first coupled signal which is a coupled portion of the output signal of the first VCO, a second directional coupler into which is coupled a second coupled signal which is a portion of the output signal of the second VCO, and a conductive path which conducts the first coupled portion to the output of the second VCO and simultaneously conducts the second coupled portion to the output of the first VCO.