Apparatus and methods for improving timing recovery of a system clock
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United States of America Patent
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Mar 18, 1997
Grant Date -
N/A
app pub date -
Feb 15, 1994
filing date -
Feb 15, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus and methods for improving timing recovery of a system clock by causing its frequency to be within a specified tolerance range during a timing recovery acquisition period for the system clock. The apparatus includes a voltage controlled oscillator for producing the system clock and a non-volatile memory containing an offset value. The non-volatile memory provides an offset value (representing an offset voltage value) which assures that the voltage controlled oscillator receives a voltage value which causes the frequency of the system clock to be within a specified tolerance range. The apparatus may also include a write control unit for determining and updating the offset value for a next timing recovery acquisition period. The methods include steps for performing these operations.
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