Voltage source measurement unit with minimized common mode errors
US7429856B1 · kind B1 · utility
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5References
14Claims
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Key dates
| Filing date | Nov 20, 2007 |
| Grant date | Sep 30, 2008 |
| Priority date | — |
| Expiry date | Nov 20, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/146
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particular configuration of voltage source measurement (VSM) circuitry minimizes common mode errors in measurement of current through a device under test (DUT), even across a wide range of output voltages. The current IDUT is not affected by common-mode errors, since the current measurement is based on the output voltage of an operational amplifier or a differential amplifier, and the circuit configuration is such that the current measurement is made while the operation amplifier or differential amplifier has very low common-mode input voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.