Portable electronic device with radio communication and controll

Details Portable electronic device with radio communication and controll Portable electronic device with radio communication and controll

1995-06-02

1997-02-18

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

455 63, 455231, 455343, H04B 110

Patent

active

056049285

ABSTRACT:
A radio transmit-receive unit can perform the communication processing stably without being affected by high frequency noise with the system activation of a computer unit, whereby if a communication processing request from the radio transmit-receive unit occurs, the computer unit sets the system state of a sub-CPU being activated to a rest state, a counter starts clocking the signal receive time of the radio transmit-receive unit when the system state of the sub-CPU is in a rest state, and a latch circuit holds electric field strength information of carrier received by the radio transmit-receive unit upon the termination of clocking by the counter. And the computer unit switches the system state of the sub-CPU being at rest to an active state, based on the end state of clocking by the counter, to restart the activation of the computer unit.

REFERENCES:
patent: 4921464 (1990-05-01), Ito et al.
patent: 4977611 (1990-12-01), Maru
patent: 5008955 (1991-04-01), Sato
patent: 5027428 (1991-06-01), Ishiguro et al.
patent: 5101510 (1992-03-01), Duckeck
patent: 5193212 (1993-03-01), Son
patent: 5204975 (1993-04-01), Shigemori
patent: 5251325 (1993-10-01), Davis et al.
"Design Considerations for Mobile Radio Units in High-Capacity Land Mobile Communications Systems" by Shuomi Yuki et al.; Review of the Electrical Comm. Laboratories; vol. 35, No. 2, 1987; pp. 109-114.

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