Telecommunications – Transmitter and receiver at separate stations
Patent
1997-06-05
1999-06-01
Bost, Dwayne D.
Telecommunications
Transmitter and receiver at separate stations
455307, 455310, H04Q 720
Patent
active
059096390
ABSTRACT:
A conductive frame for supporting a display section is higher in cost than a resin frame, and causes electric contact with other parts and a deterioration in sensitivity due to noise radiations to the antenna. When a radio selective calling receiver is in a normal standby state, since a display driving section (50) is in an inoperative state, a display detecting section (60) detects the non-execution of a display operation and sends a non-display operation signal to an intermediate-frequency section (20). In the intermediate-frequency section (20), a switch section (22) selects a filter (23) in accordance with this non-display operation signal and connects it between a radio section (10) and a demodulating section (21). When the user performs an operation of displaying time display information, calendar display information, or stereotyped expression display information on a display section (40) ion this normal standby state, the display driving section (50) is set in an operative state. The display detecting section (60) detects the execution of a display operation, and sends a display operation signal to the intermediate-frequency section (20). In the intermediate-frequency section (20), the switch section (22) selects a filter (24) in accordance with this operation signal and connects it between the radio section (10) and the demodulating section (21).
REFERENCES:
patent: 5577270 (1996-11-01), Sakai
patent: 5613218 (1997-03-01), Li et al.
patent: 5758296 (1998-05-01), Nakamura
patent: 5842116 (1998-11-01), Nishida et al.
Bost Dwayne D.
NEC Corporation
Trost William G.
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