Patent ID: 8957722
Filing Date: 2015-02-17
Classification: H03D

Abstract:
1. A double balanced image reject mixer (IRM) comprising: a radio frequency (RF) common port; four mixer devices, each of the four mixer devices comprising an intermediate frequency (IF) port, an RF port and a local oscillator (LO) port; a four-way splitter/combiner, wherein the four-way splitter/combiner is connected between the RF common port and the RF port of each of the four mixer devices; a digital four phase LO quadrature generator coupled between an LO common port and the LO port of each of the four mixer devices, the digital four phase LO quadrature generator comprising digital circuitry to digitally generate individual phase shifted LO signals for each of the four mixer devices based on a common LO signal at the LO common port, and to provide one of the individual phase shifted LO signals to the LO port of each of the four mixer devices; and a four phase IF quadrature generator coupled between an IF common port and the IF port of each of the four mixer devices, wherein the four phase IF quadrature generator converts between a common IF signal at the IF common port and individual phase shifted IF signals communicated with the IF port of each of the four mixer devices.