Battery-powered radio communication apparatus capable of prolonging the communicable state thereof
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United States of America Patent
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Nov 24, 1987
Grant Date -
N/A
app pub date -
Aug 13, 1985
filing date -
Aug 14, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A battery-powered radio communication apparatus is disclosed which comprises a power amplifier and a power detector for detecting the output power of the power amplifier. A supply voltage detector compares a standard voltage with the output voltage of a battery supplying power to the power amplifier. A gain control circuit controls the gain of the power amplifier in response to the output of the power amplifier and to the output of the supply voltage detector so as to prolong, by a certain time, the communicable state of the apparatus prior to battery depletion.
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