Receiving portion of radio communication device

Details Receiving portion of radio communication device Receiving portion of radio communication device

1997-10-23

1999-11-16

Bost, Dwayne D.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455 383, 455343, 455550, 370311, H04Q 720

Patent

active

059873396

ABSTRACT:
A receiving portion of a radio communication device includes a circuit periodically moving into a sleep mode of operation. The circuit periodically moves out of the sleep mode of operation in response to a re-activation signal. A first clock signal is generated. Clock pulses in the first clock signal are counted. The re-activation signal is generated each time the number of the counted clock pulses in the first clock signal reaches an updatable number. A second clock signal is generated which has a frequency higher than a frequency of the first clock signal. Clock pulses in the second clock signal are counted during every time interval determined by the first clock signal. An error of the frequency of the first clock signal with respect to the frequency of the second clock signal is calculated on the basis of a result of the counting of clock pulses in the second clock signal. The updatable number is set in response to the calculated error of the frequency of the first clock signal.

REFERENCES:
patent: 5737323 (1998-04-01), Lansdowne
patent: 5742650 (1998-04-01), Nuckolls et al.

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