Highly symmetrical bi-direction current sources
US5760640A · kind A · utility
19Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Dec 3, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0896
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bi-directional current source which maintains accurate, substantially equal source and sink currents over a large range of output voltages. The current source includes a primary field effect transistor (FET) and two mirroring FET's. It additionally includes at least one operational amplifier for voltage balancing. An optional operational amplifier provides and additional bias voltage and transistor matching optionally provides impedance matching of the supply voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.