Patent ID: 6304761
Filing Date: 2001-10-16
Classification: H04B

Abstract:
A mobile unit communication apparatus having digital and analog communication modes, comprising:radio wave transmission and receiving means including an antenna for transmitting and receiving digital and analog transmission signals in said digital and analog communication modes respectively;signal processing means including separate processing portions comprising a digital signal processing (DSP) portion for processing said received digital transmission signal in said digital transmission mode and an application specific integrated circuit (ASIC) portion including digital circuits for processing said analog transmission signal from said radio wave transmission and receiving means in said analog communication mode with non-programmed processing in response to a clock signal whose frequency is necessary for said non-programmed processing;input and output means for inputting an input signal and outputting an output signal from said digital transmission signal from said digital signal processing portion in said digital communication mode and from said analog transmission signal from said application specific integrated circuit portion in said analog communication mode, said digital signal processing means further processing said input signal which is transmitted by said radio wave transmission and receiving means in said digital communication mode, said application specific integrated circuit portion further processing said input signal which is transmitted by said radio wave transmission and receiving means in said analog communication mode;power supply means including a battery for supplying a supply power; andsupply power saving means for operating said ASIC portion and not operating said digital signal processing portion in said analog communication mode to reduce consumption of said supply power.