Switch controller for obtaining a plurality of functions from a

Details Switch controller for obtaining a plurality of functions from a Switch controller for obtaining a plurality of functions from a

1983-01-31

1985-02-19

Ng, Jin F.

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

455 35, 455 38, 455116, 34082544, 340345, H04B 144, H04B 102, H04Q 700

Patent

active

045010170

ABSTRACT:
In a transceiver, a multiple function switch decoder includes means for detecting actuation of the switch and means for monitoring the status of the receiver. A timer responsive to the monitoring means and detecting means establishes a predetermined time interval following each switch actuation or each received message of predetermined type. When the switch is actuated during the time interval the transmitter is enabled. When the switch is activated outside the time interval the receiver audio is activated so the user may monitor the channel. During the first switch actuation in any given time interval an encoder is enabled. On subsequent switch actuations during the same time interval the encoder is inhibited. This allows a single switch to perform a plurality of transmitter and receiver functions.

REFERENCES:
patent: 3500458 (1970-03-01), Cannalte
patent: 3500459 (1970-03-01), Battin et al.
patent: 3943444 (1976-03-01), Lundberg
patent: 4037158 (1977-07-01), Eastmond
patent: 4072898 (1978-02-01), Hellman et al.
patent: 4396910 (1983-08-01), Enemark et al.
Motorola--MX 300 Series--"Handie-Talkie" Portable Radios.
Motorola--MC14022B--CMOS MSI.
Motorola--User's Manual--M6805--M146805 Family Microcomputer/Microprocessor.
Motorola--MC146805G2--CM)S 8-Bit Microcomputer.
Motorola--MCM2802--MOS--32.times.32 Bit Electrically Erasable Programmable Read Only Memory.
Foreign German Manual--Kodieraleitung Funftonfolge--Baustein FK 102-FK 103.

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