Arrangement for coupling out an output current from a load current and for gaining a control value to control the load current
US6366036B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/222
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In an arrangement for coupling out an output current from a load current by a load (2), particularly a deflection coil of a cathode ray tube by means of an output resistor (4), which arrangement comprises an output current mirror (9, 10, 11), in which a control value in the form of the difference between two voltages dropping across two resistors (35, 36) for controlling the load current is generated and in which a reference current bank (12) is provided with a current mirror circuit whose input receives a constant current for generating constant currents, a minimal temperature dependence is obtained in that the output current is coupled to the emitter of at least a first output transistor (10) and at least a second output transistor (11) of the output current mirror, in that the reference current bank (12) supplies a first reference current which, together with the output current, is coupled to the emitter of the first output transistor (10) and the second output transistor (11) of the output current mirror, in that the current through the collector of the first output transistor (10) of the output current mirror is coupled to the input of a first current mirror (23), in that the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.