Patent ID: 6748204
Filing Date: 2004-06-08
Classification: H03D

Abstract:
A mixer circuit comprising:a gain stage configured to receive a first signal and a bias current, and in accordance therewith, produce an output signal, the gain stage receiving the bias current on a common node; a bias circuit having an input configured to receive a second signal and an output coupled to the common node to provide the bias current to the gain stage, the bias current comprising bias current frequency components; and a frequency dependent current shunt circuit coupled between the common node and a reference voltage, wherein a first portion of the bias current frequency components within a first frequency range are coupled to the reference voltage by the shunt circuit, and a second portion of the bias current frequency components within a second frequency range are coupled to the reference voltage by the shunt circuit, the first portion being larger than the second portion, wherein the second frequency range is higher than the first frequency range.