Integrated sine wave generating circuit
US6525592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2001 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Jul 3, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L3/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to an integrated high power sine wave carrier circuit for outputting a low distortion high power sine wave. The circuit is used for antennas, and especially for antennas in automotive appliances. The circuit comprises a H-bridge (2) with matched power transistors (4, 6, 8, 10), a sine generator (24) for driving the H-bridge and a regulator (22) for sensing the power applied to the antenna and controlling the current amplitude of the sine wave output by the sine generator. The circuit operates under partial time-working, whereby the integration circuit is turned on or off. The circuit therefore comprises a shutdown pin, for shutting the circuit down in order to allow cooling. The partial time operation allows the circuit to be integrated on a single die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.