Electrical power supply circuit, in particular for portable appl

Details Electrical power supply circuit, in particular for portable appl Electrical power supply circuit, in particular for portable appl

1995-12-19

2000-05-09

Rao, Andy

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455573, 455574, 455127, 323224, 323231, H04B 7005

Patent

active

06061577&

ABSTRACT:
An electricity power supply circuit for an external appliance whose consumption varies over time. The circuit comprises an electrochemical cell, a supercapacitor serving as a source of electricity for said appliance, and a chopper voltage converter between the cell and the supercapacitor, the converter serving to charge the supercapacitor at constant current while monitoring the voltage across the terminals thereof. The circuit is applicable to cellular radiotelephones.

REFERENCES:
patent: 4599523 (1986-07-01), Pless et al.
patent: 5079674 (1992-01-01), Malaspina
patent: 5180645 (1993-01-01), More
patent: 5187640 (1993-02-01), Metroka et al.
patent: 5373195 (1994-12-01), De Doncker et al.
patent: 5591212 (1997-01-01), Keimel
Patent Abstracts of Japan, vol. 017, No. 148 (E-1338), Mar. 24, 1993 corresponding to JP-A-04 315320 (Sony Corp) dated Nov. 6, 1992.

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