Patent ID: 7006812

Claim:
A portable terminal apparatus comprising: a first receiving system for receiving a quadrature modulated signal and converting the quadrature modulated signal into an intermediate-frequency signal for output; a second receiving system comprising at least one system for receiving a binary phase shift keying modulated signal and converting the binary phase shift keying modulated signal into an intermediate-frequency signal for output; an intermediate frequency stage for processing both the intermediate-frequency signal of said first receiving system and the intermediate-frequency signal of said second receiving system; and a signal processing system for processing the signal of said first receiving system that has been passed through said intermediate frequency stage and the signal of said second receiving system that has been passed through said intermediate frequency stage, wherein said intermediate frequency stage includes a variable gain amplifier for amplifying the intermediate-frequency signal of said first receiving system and the intermediate-frequency signal of said second receiving system and a quadrature demodulator for subjecting the intermediate-frequency signals that have been passed through the variable gain amplifier to quadrature demodulation for output, wherein said signal processing system includes a phase shifter that generates an I signal and a Q signal by demodulating the intermediate-frequency signal output from said second receiving system so that said I signal and said Q signal coincide with each other in phase.