System to control the output current with temperature through a controllable current limiting circuit
US6307726A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/267
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A controllable current limiting circuit (30) that, when used with a low precision current limiting circuit (10), will limit the current of the output driver transistor M1 to a relatively flat response over a broad temperature range. The current is limited by setting the voltage across a resistance, R1, to a certain value. To overcome temperature induced variations in this voltage, the compensation circuit (20) generates a current that varies with temperature. This current is injected into a terminal of the resistance, R1. This current is generated in such as a manner to ensure that the current flowing in the output driver transistor M1 is relatively constant over a wide temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.