Patent ID: 8571512

Claim:
An apparatus comprising: a master radio frequency (RF) device to receive an incoming RF signal and provide an RF current, the master RF device having a first transconductor to receive the incoming RF signal and coupled to a reference potential node and a second transconductor to receive the incoming RF signal and coupled to a supply voltage node; a master local oscillator (LO) device coupled to an output of the master RF device, the master LO device to receive the RF current and mix the RF current with a master clock signal to obtain a mixed signal pair, the master LO device including a first differential pair coupled to the first transconductor and a second differential pair coupled to the second transconductor; a rotating switch stage coupled to the master LO device to cyclically switch the mixed signal pair to one of a plurality of output ports of the rotating switch stage, the rotating switch stage including a plurality of switching pairs each to receive one of the mixed signal pair; a plurality of mixer loads each coupled to one of the plurality of output ports, each of the plurality of mixer loads to perform gaining and filtering of the mixed signal pair, each of the plurality of mixer loads including an operational amplifier having a first input terminal coupled to a corresponding output port and a second input terminal to couple to a reference potential; and a plurality of resistors each coupled to one of the plurality of mixer loads to weight the output of the corresponding mixer load and to provide an output to a summer.