Method and apparatus for providing stable voltage to analytical system
US8030942B2 · kind B2 · utility
16Cited by
17References
4Claims
0Family size
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Key dates
| Filing date | Nov 8, 2007 |
| Grant date | Oct 4, 2011 |
| Priority date | — |
| Expiry date | Aug 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/3273
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.