Power amplifying device
US6744310B2 · kind B2 · utility
21Cited by
9References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2002 |
| Grant date | Jun 1, 2004 |
| Priority date | — |
| Expiry date | Mar 20, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/426
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifying device promptly detects an abnormal condition of a load and permits protection of an output without causing power loss. A test signal having a predetermined frequency and signal level is supplied to an amplifier, and the output level is measured. The measured level is compared with the output level that is projected when the test signal is supplied with an appropriate load connected to the amplifier so as to detect a load condition. If a determination result indicates that the load is short-circuited or released, then the operation of the amplifier is promptly interrupted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.