Patent ID: 8660514

Claim:
A multiple mode RF circuit, comprising: a quad-core transistor array having an RF input, a local oscillator (LO) input, and an RF output; a differential transistor pair having an RF input and an RF output coupled to the RF input of the quad-core transistor array; a first pair of switches coupled between an RF output of the quad-core transistor array and the RF input of the differential transistor pair to selectively provide feedback for the differential transistor pair; a second pair of switches to selectively couple a LO signal to the LO input of the quad-core transistor array; and wherein, the multiple mode RF circuit has a mixer mode wherein feedback between the RF output of the quad-core transistor array and the RF input of the differential transistor pair is decoupled by the first pair of switches and the LO signal is coupled to the LO input of the quad-core transistor array by the second pair of switches, and an amplifier mode wherein feedback between the RF output of the quad-core transistor array and the RF input of the differential transistor pair is coupled by the first pair of switches and the LO signal is decoupled from the LO input of the quad-core transistor array by the second pair of switches.