Electronic overload protection circuit
US4301490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Jul 9, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/52
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A solid-state overload protection circuit for protecting a multiple-stage compound transistor power amplifier. The overload protection circuit includes a current-limiting circuit for sensing or limiting the current during an overload condition. The current-limiting circuit includes a transistor which conducts to limit the current in the output stages of the multiple-stage power amplifier. A monitoring circuit including a timing circuit, a comparator, and a switching transistor monitors the duration of the overload condition and disables the input stages of the multiple-stage power amplifier when a prolonged overload condition persists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.