Measurement amplifier
US5770956A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1996 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Jun 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A measurement amplifier has an integrator circuit (2) and a reference current source (33) which supplies a reference current to the input of the integrator when the voltage set at the output of the integrator (2) exceeds or falls below a reference voltage. In addition, a differentiator, for example, is provided which receives the output voltage of the integrator (2) and supplies an output signal which is proportional to the variation in time of the output voltage of the integrator. The output voltage of the differentiator is proportional to the input current to be measured by the measurement amplifier. The measurement amplifier allows very weak input currents to be rapidly and accurately detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.