Patent ID: 6650199
Filing Date: 2003-11-18
Classification: H01P

Abstract:
An RF A/B switch associated with a receiver comprising:a first input; a second input; an output; a first diode circuit comprising a plurality of diodes and an impedance network coupled between the first input and the output; a second diode circuit comprising a plurality of diodes and an impedance network coupled between the second input and the output; and, a controller, wherein the controller is arranged to establish a common series biasing current through at least one of the diodes in each of the first and second diode circuits, wherein the common series biasing current biases one of the first and second diode circuits so as to configure a respective one of the impedance networks in a low pass filter configuration that couples a signal on one of the first and second inputs to the output, and wherein the common series biasing current biases the other of the first and second diode circuits in a blocking configuration so as to block a signal on the other of the first and second inputs from the output.