Importance

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Abstract

A direct sequence spread spectrum communication system with a compact automatic gain controller for finely controlling a gain of a received signal. The automatic gain control device may be constructed with a reception signal gain controller for causing an radio frequency amplifier to function as an attenuator during a packet reception interval when the received signal has a level higher than a normal operating level, so as to attenuate a level of the received signal to the normal operating level, and for varying an output level of a local oscillator signal of an intermediate frequency converter upon receiving the received signal having a level which is equal to or lower than the normal operating level, so as to match an output level of an intermediate frequency signal generated by an intermediate frequency stage with an input level of a base band stage.

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First Claim