Voltage reference arrangement, a voltameter, a battery voltage d

Details Voltage reference arrangement, a voltameter, a battery voltage d Voltage reference arrangement, a voltameter, a battery voltage d

1996-07-18

1998-10-27

Wong, Peter S.

Electricity: power supply or regulation systems

External or operator controlled

Using an impedance as the final control device

323349, G05F 110

Patent

active

058282092

ABSTRACT:
A voltage reference arrangement is known for deriving a number of voltages from an input reference voltage. The known arrangement utilizes a rigid resistive voltage divider. A flexible voltage reference arrangement is provided in which inaccuracies in the input reference voltage are eliminated, and a plurality of accurate voltages can be easily derived from an obtained reference voltage. The arrangement comprises a digitally controlled potentiometer having a slider coupled to a multiplexer for multiplexing the slider to an input of a differential amplifier and to outputs. The voltage reference arrangement may be used in a voltmeter and in a battery subtractor in a telephone handset so as to share hardware.

REFERENCES:
patent: 5196782 (1993-03-01), D'Aleo et al.
patent: 5208842 (1993-05-01), Atwood et al.
patent: 5281906 (1994-01-01), Thelen, Jr.
patent: 5526274 (1996-06-01), Bolan et al.

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