Patent ID: 7218163
Filing Date: 2007-05-15
Classification: H03D

Abstract:
1. A radio-frequency mixer arrangement, comprising: a multiplier circuit; a differential amplifier circuit comprising an input and an output, the output of the differential amplifier coupled to a first input of the multiplier circuit; an operational amplifier circuit comprising an input and an output, the output of the operational amplifier coupled to the input of the differential amplifier, and a feedback path from the output of the operational amplifier to the input of the operational amplifier, wherein the feedback path contains the differential amplifier circuit; a first signal input of the radio-frequency mixer coupled to the input of the operational amplifier circuit; a second signal input of the radio-frequency mixer coupled to a second input of the multiplier circuit; and at least one capacitance element in the feedback path between the output of the differential amplifier circuit and the input of the operational amplifier circuit, wherein the capacitance element operates in the feedback path as an anti-aliasing filter.