Pulse or digital communications – Synchronizers
Reexamination Certificate
2005-02-10
2009-06-23
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Synchronizers
C375S355000, C340S870030
Reexamination Certificate
active
07551702
ABSTRACT:
A receiver is synchronized with a first clock frequency or signal of a transmitter for the proper reception of transmitted and received signals, such as data carrying signals (DS). The first clock frequency is for example a carrier frequency. A local oscillator generates a second clock frequency or signal in the receiver. Cycles or impulses of the second clock signal are counted between predetermined flanks of the received signal (DS) to provide a count (N). Based on the second clock signal and the count (N) a first ratio (TV) is provided that represents a first ratio between the first clock frequency or signal and the second clock frequency or signal. The first ratio is compared with a predetermined or given second ratio (TV) to provide a comparing result. The predetermined second ratio is then updated in response to the comparing result to provide an updated ratio (TV′). The present circuit is constructed to perform these steps.
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LIN Protocol Specification, Revision 1.1; Apr. 17, 2000; pp. 8, 13, 26 and 27; Motorola GmbH, Munich, Germany.
Hauser Clemens
Soerensen Arno
ATMEL Germany GmbH
Fasse W. F.
Fasse W. G.
Ghebretinsae Temesghen
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