Method and apparatus for saving power in a radiotelephone

Details Method and apparatus for saving power in a radiotelephone Method and apparatus for saving power in a radiotelephone

1994-10-07

1997-01-14

Pham, Chi H.

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

455127, 455343, H04B 140

Patent

active

055949517

ABSTRACT:
A radiotelephone (300) having timer shutoff feature and a roam shutoff feature. The timer shut off feature implements a process (102-114) in which a processor (310) determines (106) if a flip (408) is closed or an end key (410) has been pressed. If either of these events occur a timer is started (108). If the timer exceeds (110) a predetermined period of time before another phone call exists (112) the radiotelephone (300) is placed (114) in an off mode. The roam shutoff feature implements a process in which the processor (310) determines (116) if the radiotelephone (300) is in a roam mode. If the radiotelephone (300) is in a roam mode and no phone call exists (118) the radiotelephone is placed (114) in the off mode.

REFERENCES:
patent: 3962553 (1976-06-01), Linder et al.
patent: 4903291 (1990-02-01), Tsurufuji et al.
patent: 4903319 (1990-02-01), Kasai et al.
patent: 5027428 (1991-06-01), Ishiguro et al.

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