Apparatus and method for calibration of sleep mode clock in wire

Details Apparatus and method for calibration of sleep mode clock in wire Apparatus and method for calibration of sleep mode clock in wire

1997-06-17

1999-11-30

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

455 383, H04B 116, H04B 700

Patent

active

059958200

ABSTRACT:
The present invention presents a calibrator for a mobile station of a TDMA wireless communications system such that the calibrator calibrates a low-frequency clock to a high frequency clock locked to system timing. When the mobile station is in idle mode (i.e., listening to a paging channel periodically, but otherwise taking no action), the control processor commands the mobile station to enter into sleep mode to minimize power consumption. During sleep mode, the high-frequency reference clock and all clocks derived from it are turned off. Only the calibrated low-frequency clock remains operating to clock the sleep logic.

REFERENCES:
patent: 4209786 (1980-06-01), Barley et al.
patent: 4331941 (1982-05-01), Kovalick et al.
patent: 5101506 (1992-03-01), Walls
patent: 5416435 (1995-05-01), Jokinen et al.
patent: 5657317 (1997-08-01), Mahany et al.
patent: 5737322 (1998-04-01), Burbidge et al.
patent: 5737323 (1998-04-01), Lansdowne
patent: 5758278 (1998-05-01), Lansdowne

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