Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Patent
1995-11-07
1998-09-08
Chin, Stephen
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
331 1R, H03D 324
Patent
active
058056505
ABSTRACT:
A circuit for transmitting data in asynchronous transfer mode includes two phase-locked loops associated with a transmission unit and a reception unit, respectively. Each PLL is provided with a voltage-controlled oscillator formed by an astable multivibrator. The reference current fixing the free oscillating frequency of the multivibrator that is associated with the reception unit corresponds to the frequency adjustment current of the multivibrator that is associated with the transmission unit. Each VCO includes a differential amplifier, connected as a voltage-to-current converter, receiving two voltages corresponding to the phase error of the loop with which it is associated, and providing a frequency adjustment current of its astable multivibrator.
REFERENCES:
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Belot Didier
Dugoujon Laurent
Chin Stephen
Roundtree Joseph
SGS-Thomson Microelectronics S.A.
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