The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 1997
Filed:
Aug. 31, 1994
Masahiko Osaka, Tokyo, JP;
NEC Corporation, Tokyo, JP;
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.