Timing extraction circuit

Details Timing extraction circuit Timing extraction circuit

1984-12-10

1988-04-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307527, 307518, 328139, 328 63, 328 72, H03B 100, H03K 117

Patent

active

047361204

ABSTRACT:
A regenerator for an undersea optical transmission system has a timing extraction circuit for extracting the clock signal from an NRZ PCM signal. The circuit comprises a surface acoustic wave filter (F) which feeds an amplifier which comprises a number of similar cascaded amplifier sections provided by an integrated circuit. The first stage is a grounded base stage (stage 1) and the following sections each include a balanced emitter-follower buffer stage (stage 2) and a balanced long-tailed pair stage (stage 3). Any base and emitter voltages in an amplifier section are minimised if not eliminated by the long-tailed pair having equal emitter and collector loads.

REFERENCES:
patent: 3304505 (1967-02-01), Pricer
patent: 3863173 (1975-01-01), Scheib et al.
patent: 4508166 (1986-04-01), Okano

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