Patent ID: 7643600

Claim:
A receiver, comprising: a first mixing digital-to-analog converter (DAC) including a first input for receiving an input signal, a second input for receiving a digital first local oscillator (LO) signal and an output; a second mixing DAC including a first input for receiving the input signal, a second input for receiving a digital second local oscillator (LO) signal and an output; a direct digital frequency synthesizer (DDFS) including a first output coupled to the second input of the first mixing DAC, a second output coupled to the second input of the second mixing DAC and a control input, wherein the DDFS is configured to provide the digital first and digital second LO signals, and wherein the digital first and digital second LO signals are quadrature signals; a phase correction circuit including an output coupled to the control input of the DDFS, wherein the phase correction circuit is configured to provide a phase correction signal to the control input of the DDFS based on a phase control signal at an input of the phase correction circuit; a first selectable load including an input coupled to the output of the first mixing DAC and a control input; and a magnitude correction circuit including a first output coupled to the control input of the first selectable load, wherein the magnitude correction circuit is configured to provide a first magnitude correction signal to the control input of the first selectable load based on a magnitude control signal at an input of the magnitude correction circuit.