Circuit for detecting variation of resistance of a variable-resistance element
US4716306A · kind A · utility
16Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1984 |
| Grant date | Dec 29, 1987 |
| Priority date | — |
| Expiry date | Aug 9, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9517
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for detecting the variation of resistance of a variable-resistance element comprises a pair of grounded-base transistors with their base electrodes provided with different base voltages and with their emitter electrodes connected to both terminals of the variable-resistance element so that the voltage between both terminals of the element is kept constant. The current density of the variable-resistance element does not vary when the resistance of the variable-resistance element varies, whereby the lifetime of the element can be prolonged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.