Automatic bias circuit

Details Automatic bias circuit Automatic bias circuit

1985-04-30

1986-11-25

Bookbinder, Marc E.

Pulse or digital communications

Repeaters

Testing

307264, 307359, 328164, H04L 2506

Patent

active

046253203

ABSTRACT:
An automatic bias control circuit for a data limiter in a synchronous data communications system is disclosed. After word synchronization is achieved, the automatic bias control circuit is enabled and a time relationship between the limited data signal edges and a synchronized local clock signal is detected. The automatically controlled bias level is then modified upward or downward by an additive or subtractive voltage increment for a period of time related to the data bit rate so that the true baseline of the data signal is approximated by the bias level and the detected time relationship is thereby adjusted so that the edges are essentially synchronized with the local clock signal.

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Transmissions Systems for Communications; Bell Telephone Laboratories, Dec. 1971, pp. 655 & 656.

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