Circuit and method for providing an auto-off capability for...

Details Circuit and method for providing an auto-off capability for... Circuit and method for providing an auto-off capability for...

2007-03-01

2009-12-01

Trinh, Sonny (Department: 2618)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S127100, C455S127500

Reexamination Certificate

active

07627353

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.

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