Bipolar tracking current source/sink with ground clamp
US5465041A · kind A · utility
6Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1993 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Sep 17, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/46
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for controlling a bipolar constant current when the current is being supplied to an active or reactive element. Tracking is extended to either sink or source modes. A switchable driven ground state is also provided. An operational amplifier buffer senses the voltage amplitude at the junction of the system output and active or reactive load element. This relatively low impedance output is summed or offset with a regulated voltage. This level is again buffered to present a low output impedance and series connected with a current limiting resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.