Radio selective call receiver having function to detect power vo

Details Radio selective call receiver having function to detect power vo Radio selective call receiver having function to detect power vo

1996-07-18

1998-07-07

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

455 383, 455574, 34082544, H04B 116

Patent

active

057783128

ABSTRACT:
A radio selective call receiver having a function to detect a power voltage according to the present invention compriss an input switch circuit 5 for selecting either a demodulated signal or power voltage and applying its selected signal or voltage to an analog/digital converter 6. A decoder 8 and a control unit 10 judge whether the call number of the receiver is included when output from the A/D converter 6 is the digital demodulated signal. When the call number is included, a call report is made. When output from the A/D converter 6 is the digital voltage signal, it is compared with a reference value. When it is smaller than the reference value, an alarm is given. Since the single A/D converter 6 is used to detect a signal and a reduction in power voltage, it is possible to simplify circuit configuration and save power.

REFERENCES:
patent: 4755816 (1988-07-01), DeLuca
patent: 5265271 (1993-11-01), Marko et al.
patent: 5392462 (1995-02-01), Komaki
patent: 5613227 (1997-03-01), Maki

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