Patent ID: 7449934
Filing Date: 2008-11-11
Classification: H03D

Abstract:
1. A mixer, comprising: a first input and a second input for inputting a first signal; a third input and a fourth input for inputting a second signal; a first output and a second output for outputting a third signal; a first load resistor connected between a supply voltage and the first output; a second load resistor connected between the supply voltage and the second output; a first transistor having a drain connected to the first output, a gate connected to the third input, and a source; a second transistor having a drain connected to the second output, a gate connected to the fourth input, and a source; a third transistor having a drain connected to the sources of the first transistor and the second transistor, a gate connected to the first input, and a source connected to a current source; a fourth transistor having a drain connected to the first output, a gate connected to the fourth input, and a source; a fifth transistor having a drain connected to the second output, a gate connected to the third input, and a source; a sixth transistor having a drain connected to the sources of the fourth transistor and the fifth transistor, a gate connected to the second input, and a source connected to the current source; a seventh transistor having a source connected to the supply voltage, a gate connected to a voltage source, and a drain connected to the drains of the third transistor and the sixth transistor; a first inductor connected between the drain of the seventh transistor and the drain of the third transistor; and a second inductor connected between the drain of the seventh transistor and the drain of the sixth transistor.