Browse Prior Art Database

SELECTABLE TIME DELAY FOR LOW CELL INDICATION

IP.com Disclosure Number: IPCOM000006486D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2002-Jan-08
Document File: 1 page(s) / 57K

Publishing Venue

Motorola

Related People

Thomas F. Holmes: AUTHOR [+2]

Abstract

In many products being produced today, the same hardware is used for detecting Low Cell and Dead Cell voltage levels. The hardware does not take into account the various batteries being used in the different prod- ucts, along with different coding schemes and different code baud rates. As a result, some products give a pre- mature Low Cell and/or Dead Cell indication to the user.

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MOTOROLA INC. Technical Developments Volume 16 August 1992

SELECTABLE TIME DELAY FOR

LOW CELL INDICATION

by Thomas F. Holmes and Richard E. Johnson

  In many products being produced today, the same hardware is used for detecting Low Cell and Dead Cell voltage levels. The hardware does not take into account the various batteries being used in the different prod- ucts, along with different coding schemes and different code baud rates. As a result, some products give a pre- mature Low Cell and/or Dead Cell indication to the user.

  For example, when battery detection hardware designed for a watch battery pager is used in a belt pager having a AA battery, the belt pager displays a low cell indication for a much longer time than the pager with a watch battery. This results in both the customer throw- ing away the battery early on the belt pager, for those that change the cell at a low battery warning, and giving the appearance of non-conformity between products for those customers that wait until his pager goes to a Dead Cell voltage level before replacing the battery.

  The Selectable Time Delay can be used to delay the time between a low cell detection and indication. This would allow all products to have approximately the same duration of Low Cell, thus showing conformity among all products as well as allowing the customer to get the most out of a battery,

  The delay is set to allow a predetermined number of days between the Low Cell indication and a bad cell indication o...