Portable radio apparatus having batteries for supplying a plurality of voltages
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 6, 1997
Grant Date -
N/A
app pub date -
Aug 31, 1994
filing date -
Aug 31, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A portable radio communication apparatus has a main unit and a detachable and chargeable battery pack. The main unit has a power amplifier (power module) for sending out high frequency power to a whip antenna for transmitting/receiving use and a transmit/receive signal processing section for signal processing in transmission and reception. The battery pack further has a nickel hydride battery of a layered structure, which is low in internal resistance and outputs a high voltage, for supplying power to the transmission power amplifier which consumes a large current, and a low-voltage lithium ion battery, which is high in internal resistance, for supplying power to the transmit/receive signal processing section which consumes a relatively small current. This configuration makes unnecessary the otherwise required stabilizing circuit for supplying a low voltage to the transmit/receive signal processing section. At the same time, the voltage fluctuations of the nickel metal hydride battery when the power amplifier begins transmission or at any other time would not affect the voltage from the lithium ion battery.
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