Arrangement for protecting the output transistors in a power amplifier
US5942945A · kind A · utility
2Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Oct 30, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/468
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In an arrangement for protecting the output transistors in a power amplifier against temperatures exceeding a predetermined first temperature value, a temperature sensor is provided adjacent to the output transistors to sense their temperature and influence the power amplifier when the first temperature value is reached. The temperature sensor is adapted to vary the driving current of the power amplifier inversely proportional to the temperature of the output transistors for temperature values between the first temperature value and a predetermined higher temperature value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.