Chopper amplifier circuit for the supply of a current proportional to a voltage
US5170132A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Sep 12, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/432
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The disclosure relates to fast amplification circuits that are designed to provide an output current of some amperes, proportional to an input voltage, and have a frequency spectrum that may go beyond 1 MHz. A linear amplifier follows the fast variations in the input voltage and gives a load all the output current so long as this current is low. As soon as the output current from the linear amplifier reaches a given value, a chopper amplifier gives a current that causes a reduction in the output current of the linear amplifier. The circuit may be applied, in particular, to the control of deflection coils and as a high efficiency amplification circuit for audiofrequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.