Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1990-04-02
1991-09-24
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
331 2, 331 49, 328120, 375119, H03K 5135
Patent
active
050520300
ABSTRACT:
In order to replace a reference clock s.sub.R, as needed, and without phase shift, with another clock f, the latter clock must be synchronized to the reference clock in frequency and in phase. Since the reference clock can fail or can be disturbed, undesirable synchronizations often occur in such cases. An error-free, phase-wise optimal synchronization of the two clocks is achieved and synchronization is carried out as a rule only when a defined edge of the reference clock appears within a time range defined with reference to the clock f.
REFERENCES:
patent: 4282493 (1981-08-01), Moreau
patent: 4297649 (1981-10-01), Sbuelz
patent: 4583054 (1986-04-01), Basile
Ernst Wolfram
Uhlig Gerhard
Safourek Benedict V.
Siemens Aktiengesellschaft
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