Patent ID: 6263199
Filing Date: 2001-07-17
Classification: H03D

Abstract:
A frequency conversion circuit, comprising:a differential transistor circuit having first and second inputs coupled for receiving an input signal and first and second conduction terminals coupled to first and second nodes for receiving first and second reference currents;a first switching circuit having an input coupled to the first node, a control input coupled for receiving a local oscillator signal, and first and second outputs coupled to first and second outputs of the frequency conversion circuit;a second switching circuit having an input coupled to the second node, a control input coupled for receiving the local oscillator signal, and first and second outputs coupled to the first and second outputs of the frequency conversion circuit; anda current mirror circuit having an input coupled to the first output of the frequency conversion circuit and an output coupled to the second output of the frequency conversion circuit for providing a single-ended output signal of the frequency conversion circuit.