Patent ID: 7512395

Claim:
An integrated radio receiver device, comprising: a plurality of switches, wherein whether the switches are in a closed or an open position determines whether IQ demodulation, ASK/AM demodulation, FSK/FM demodulation, and simultaneous AM and FM demodulation are supported by the receiver device; a first stage down-conversion mixer; an IF amplifier, wherein the IF amplifier acts as both an amplifier and a filter, wherein a signal is band-limited prior to detection for optimum performance and this band-limiting happens at IF; wherein the IF amplifier is a three-stage limiting amplifier comprising two pairs of input transistors, wherein no more than one pair of said input transistors is resistively degenerated; an IQ down-converter; a discriminator filter with 90 degree phase shift, such that the discriminator filter is differential and centered at an IF frequency of a receiver device; an AM detector at the output of the first stage down-conversion mixer and the IF amplifier, wherein an output of the AM detector is multiplexed with either an I-channel or a Q-channel output into a baseband amplifier and filter; and an FM detector at the output of the first stage down-conversion mixer and the IF amplifier, wherein an output of the FM detector is multiplexed with either the I-channel or Q-channel output into the baseband amplifier and filter; wherein the AM and FM detectors support simultaneous AM and FM demodulation by multiplexing the output of the AM detector and the output of the FM detector; and wherein the device supports complex IQ modulation, ASK/AM modulation, and FSK/FM modulation.