Variable format radio pager having power saving mode during bina

Details Variable format radio pager having power saving mode during bina Variable format radio pager having power saving mode during bina

1997-06-20

1999-08-10

Zimmerman, Brian

Communications: electrical

Continuously variable indicating

With meter reading

455 383, 455343, 455574, 370311, 370313, H04Q 900

Patent

active

059365463

ABSTRACT:
A radio pager includes a waveshaper for shaping a baseband signal recovered from a demodulated variable format paging signal into a binary signal. A/D conversion and symbol decision circuitry provides conversion of the baseband signal into a multi-bit signal representing one of predefined discrete levels. A format detector responds to the binary signal from the waveshaper for producing a first output indicating that a two-level signal is forthcoming or a second output indicating that a more-than-two-level signal is forthcoming. The binary signal is supplied to a decoder in response to the first output of the format detector, and the multi-bit signal is supplied to the decoder in response to the second output of the detector. A power saving circuit is responsive to the first output of the format detector for inactivating the A/D conversion and symbol decision circuitry and responsive to the second output for activating that circuitry.

REFERENCES:
patent: 5493282 (1996-02-01), Petreye et al.

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