Power source device for portable type radio apparatus

Details Power source device for portable type radio apparatus Power source device for portable type radio apparatus

1982-12-29

1985-01-22

Bookbinder, Marc E.

Telecommunications

Transmitter

Measuring, testing, or monitoring of transmitter

340654, 375 71, 455117, H04B 102, H04B 1700

Patent

active

044956495

ABSTRACT:
A power source device for a portable type radio apparatus having a transmitting circuit wherein the transmitting circuit is connected to the power source through a time constant circuit and a tone signal generating circuit is connected to the time constant circuit through a delay timing circuit. The tone signal generating circuit is operated at a required time before the operation of the transmitting circuit is terminated by the time constant circuit to inform a user of the fact that the transmitting circuit is about to be stopped in operation.

REFERENCES:
patent: 3469191 (1969-09-01), Russell, Jr. et al.
patent: 3500459 (1970-03-01), Battin et al.

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