Patent ID: 7030667
Filing Date: 2006-04-18
Classification: H03B,H03D

Abstract:
1. A frequency conversion circuit, comprising: an input configured to supply an input signal at an input frequency; an output configured to tap off a complex output signal at an output frequency that is dependent on the input frequency, wherein the output comprises an in-phase path and a quadrature path; a first frequency mixer comprising a first input connected to the input of the frequency conversion circuit, a second input and an output coupled to the output of the frequency conversion circuit; a second frequency mixer comprising a first input connected to the input of the frequency conversion circuit, a second input and an output coupled to the output of the frequency conversion circuit; and a frequency divider comprising an input coupled to the output of the first frequency mixer, an in-phase output coupled to the second input of the second frequency mixer, and a quadrature output coupled to the second input of the first frequency mixer, wherein the frequency divider is configured to supply a respective signal component of a signal input thereto at a divided-down output frequency.