Patent ID: 6359940
Filing Date: 2002-03-19
Classification: H04B

Abstract:
A receiver that downconverts signals modulated using a plurality of modulation formats to a common intermediate frequency range, comprising:a first band selection filter that selects a first frequency range; a second band selection filter that selects a second frequency range; a third band selection filter that selects a third frequency range; a first downconverter, coupled to an output of the first band selection filter, that downconverts signals from the first frequency range to the common intermediate frequency range; a second downconverter, selectively coupled by a switch to either an output of the second band selection filter or an output of the third band selection filter, that downconverts signals from either the second frequency range or the third frequency range to the common intermediate frequency range, wherein the second downconverter has an input coupled to a frequency doubling circuit; switching circuitry that selectively couples one of either a first oscillating signal from a voltage controller oscillator (VCO) having a VCO frequency range or a second oscillating signal at a second frequency that is outside the VCO frequency range to an input of the first downconverter and an input of the frequency doubling circuit.