To provide an electronic device, which is capable of reducing the power consumption of a system as a whole and improving the performance and function of the system by integrating the functions required for the system into integrated circuits which are made to match with each characteristic and providing a power supply system adaptive to each integrated circuit.
A transmission and reception circuit 2 which is principally a high-frequency circuit is constituted of a transmission/reception change-over switch 10, and a power amplifier 11 is integrated into a single integrated circuit. Then an RF signal processing circuit 3, which is principally an analog circuit constituted of a low-noise amplifier 12, a reception mixer 13, a transmission mixer 14, a voltage-controlled transmitter 16, a frequency synthesizer 15, etc., is integrated into another integrated circuit. In addition, a base-band signal processing circuit 4, which is principally a digital circuit composed of a demodulator 17, a modulator 18, a sound signal processing circuit 19, a CPU 21 for control, a memory 22, an image signal processing circuit 20, etc., is integrated into a third integrated circuit, so as to optimize the voltage supplied from a voltage control circuit 5 in accordance with the characteristics of each circuit.
YOSHIMI MAKOTO
YOSHITOMI SADAYUKI
INOU KAZUMI
KATSUMATA YASUHIRO
WATANABE SHIGEYOSHI
