Method and apparatus for providing stable voltage to...

Details Method and apparatus for providing stable voltage to... Method and apparatus for providing stable voltage to...

2007-11-08

2011-10-04

Nguyen, Vincent Q (Department: 2858)

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

C205S775000

Reexamination Certificate

active

08030942

ABSTRACT:
An electrochemical cell has two terminals. One of the terminals is connected to a pulse-width-modulated (PWM) power supply and to a voltmeter. The other terminal is connected to circuitry capable of switching between amperometric and potentiometric measurement modes. A sequence of successive approximations permits selection of a PWM duty cycle giving rise to a desired voltage at the terminal connected with the power supply. In this way a stable excitation voltage is supplied to the cell even in the face of supply voltage instability or drift or instability in electronics coupled with the cell.

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