Browse Prior Art Database

ACTIVE BATTERY PACK INDICATOR

IP.com Disclosure Number: IPCOM000006040D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Nov-28
Document File: 2 page(s) / 79K

Publishing Venue

Motorola

Related People

Mike DeLuca: AUTHOR [+2]

Abstract

This invention relates to an active battery pack for use with two way radios. State-of-the-art battery operated radios use linear voltage regulators to generate a regulated voltage from the battery voltage. This type of regulator wastes about 30% of the battery power (l-5/7.5) in generating a regulated 5 volt supply from a nominal 7.5 volt battery. This power is dissipated in a regulating transistor.

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MOTOROLA INC. Technical Developments Volume 12 April 1991

ACTIVE BATTERY PACK INDICATOR

by Mike DeLuca and Robert E. Stengel

  This invention relates to an active battery pack for use with two way radios. State-of-the-art battery operated radios use linear voltage regulators to generate a regulated voltage from the battery voltage. This type of regulator wastes about 30% of the battery power (l-5/7.5) in generating a regulated 5 volt supply from a nominal 7.5 volt battery. This power is dissipated in a regulating transistor.

  This invention uses a battery pack which includes at least one DC-DC converter responsive to a connection to the radio and control signals from the radio. The DC-DC converter generates regulated voltage from the battery voltage. Since the DC-DC

connected, the invention includes a means for determining that the battery pack is connected to the radio before the DC-DC converter is activated. A 2nd DC-DC converter similarly activated supplies regulated voltage to the receiver, thereby isolating the UC power supply from the RF power supply. Additionally, the switching frequency of the DC-DC converter and the UC arc driven from a common clock source, thereby aligning converter and computer spurs.

  Such a battery pack may find use in electronic components such as 2 way radios and cellular telephones which require efficient use of battery converter consumes power even when no load is power.

REMOVABLE BAlTERY TRANSCIEVER

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