Electronic protective circuit
US3979642A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1974 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Sep 20, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electronic protective circuitry for protecting an electrical circuit, such as a constant current source circuit, from damage due to an overvoltage applied to the circuit. The protective circuit employs circuitry for limiting the magnitude of the voltage across a first portion of the circuit, such as an amplifier output circuit, so that the voltage thereacross is limited to a given maximum voltage level. A current limiter is connected in series between the first portion and second portion for limiting the magnitude of current flowing through the circuitry to a given maximum current level. Essentially all of the overvoltage is applied across the current limiter. The protective circuit is particularly applicable for protecting an amplifier from damage due to an overvoltage applied to its output circuit, as well as for protecting a resistor connected in series with the output circuit of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.