Patent ID: 8280338
Filing Date: 2012-10-02
Classification: H03D

Abstract:
1. A double balanced active mixer comprising: a first input and a second input configured to input a Radio Frequency (RF) signal, wherein the first and second inputs are coupled to respective gates of a first input transistor and a second input transistor; a third input and a fourth input configured to input a local oscillator signal; a first output and a second output configured to output an Intermediate Frequency (IF) signal; a plurality of switches configured to convert the RF signal to the IF signal; a dynamic bleed circuit configured to dynamically reduce a dc-current of the plurality of switches at a switching-point of the plurality of switches; a first load connected between a supply voltage and the first output; a second load connected between the supply voltage and the second output; and a common mode feedback circuit configured to feed a common mode signal to a common mode feedback control device that is in series between the dynamic bleed circuit and the supply voltage, and wherein at least one of the gates of the first and the second input transistors is not coupled to the dynamic bleed circuit.