Patent ID: 6122497
Filing Date: 2000-09-19
Classification: H03D

Abstract:
An RF mixer comprising:a mixer core having an LO port for receiving an LO signal, an IF port for providing an IF output signal, and an input port having first and second input terminals for receiving first and second current signals; andan RF input section coupled to the input port for providing the current signals responsive to an RF input signal;wherein the RF input section includes:a first transistor coupled to the first input terminal,a second transistor coupled to receive the RF input signal, wherein the second transistor is diode-connected,a third transistor coupled to the second transistor and the second input terminal and arranged to form a current mirror with the second transistor, andan inductor coupled to the first transistor to extend the dynamic range of the mixer; andwherein the first transistor is configured for operation in common base mode.