Insulation resistance tester
US4336494A · kind A · utility
6Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1980 |
| Grant date | Jun 22, 1982 |
| Priority date | — |
| Expiry date | Jun 26, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/129
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An insulation resistance tester is provided having a logarithmic conversion circuit. A simple circuit arrangement is employed making use of a logarithmic relation between forward voltage and current of a semiconductor element, such as a diode, or a logarithmic relation between the voltage and current between the base and emitter of a transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.