Apparatus for measuring current and other parameters of an electornic device in response to an applied voltage
US5818238A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 15, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Mar 15, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A first terminal of a device-under-measurement (DUM) is connected to the input of a buffer amplifier having its output applied to the inverting input of an operational amplifier through a resistor having the value "aR". A resistor having a value "R" is connected between the inverting input and ground. A second terminal of the DUM is connected to the input of a buffer amplifier having its output connected to the non-inverting input of the operational amplifier through a resistor having the value "ar". The non-inverting input is also connected to the output of a signal generator through a resistor having the value "r". The second terminal is also connected to ground through a load. An oscilloscope is connected across the outputs of the buffer amplifiers, and a computer controls the signal generator in response to a signal from the oscilloscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.