Circuit and method for providing an auto-off capability for a wireless transmitter
US7627353B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2007 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | May 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit and method for providing an auto-off capability for a wireless transmitter, of a type having an audio plug which mates with the output jack of an audio source. The portable transmitter modulates signals from a baseband signal source onto a carrier and transmits the RF carrier to a receiver. The auto-off capability is provided to prolong battery life and eliminate the transmission of unmodulated RF carriers. The auto-off capability comprises turning power off to the transmitter circuit when baseband input signal is absent for more than a predetermined amount of time, and immediately turning on the transmitter circuit when baseband signal is present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.