Circuitry for controlling load current
US5796278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Apr 26, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Circuitry for controlling load current, in accordance with the present invention, utilizes a load drive transistor configuration operable to provide a first load current path having a first fraction of load current flowing therethrough and a second load current path having a second smaller fraction of load current flowing therethrough. The circuit includes a sense resistor associated with the load drive transistor to detect various load current threshold values. In order to reduce debiasing effects of the sense resistor upon the second load current path of the load drive transistor, a compensation resistor is provided between drive inputs associated with each of the two current paths. The compensation resistor has a compensation voltage established thereacross which is operable to negate the debiasing effect of the sense resistor on the load driving device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.