Patent ID: 6445729
Filing Date: 2002-09-03
Classification: H03G,H04B

Abstract:
A receiver apparatus in a code division multiple access system comprising:a low noise amplifier for amplifying a signal received via an antenna; a first filter for extracting components of a usable band from said signal amplified by said low noise amplifier; a voltage controlled amplifier for amplifying said signal filtered by said first filter; a down mixer for converting said signal amplified by said voltage controlled amplifier to an intermediate frequency; a second filter for eliminating unnecessary waves from said signal converted by said down mixer, generated during said conversion operation of said down mixer; an automatic gain controlled amplifier for amplifying said signal filtered by said second filter; a demodulator for demodulating said signal amplified by said automatic gain controlled amplifier; and a control unit for receiving said signal demodulated by said demodulator, and determining a degree of amplification of each of said amplifiers in accordance with a power level of said received signal.