Circuit for converting a transponder controller chip output...

Details Circuit for converting a transponder controller chip output... Circuit for converting a transponder controller chip output...

2011-07-12

2011-07-12

Payne, David C. (Department: 2611)

Pulse or digital communications

Synchronizers

C375S373000, C375S359000, C327S141000, C327S002000, C327S003000

Reexamination Certificate

active

07978800

ABSTRACT:
A translation circuit for mediating between a fiber-optic controller chip and a host device. The translation circuit may be on a fiber-optic transponder. The controller chip includes a phase locked loop that outputs a short synchronization signal when a hunting frequency passes through a target data signal frequency while hunting for a data signal and outputs a synchronization signal when the phase locked loop is locked onto a data signal. The translation circuit distinguishes between the synchronization signals and generates a lock signal when the phase locked loop is locked onto a data signal, but does not when the hunting frequency passes through the target data signal frequency. The lock signal may be used by a host device into which the fiber-optic transponder has been in installed. Errors from misinterpreted signals can thus be mitigated.

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Phase-Locked Loop Protocol Scheme for a Contaminated Synchronization Field. IBM Technical Disclosure Bulletin, May 1990, US vol. No. 32, Issue 12, No. 336-337 Publication Date: May 1, 1990.
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