Sync detect circuit

Details Sync detect circuit Sync detect circuit

1997-12-04

1999-11-16

Le, Thien Minh

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

34022536, G05B 1902

Patent

active

059870389

ABSTRACT:
A sync detect circuit is comprised of two serial data registers (40) and (42), each for storing a single word. A plurality of current sources in current source banks (44) and (46) are operable to convert the bits in the stored sync word to a differential current domain. Depending upon the logic state, the currents are added on two lines (50) and (52). When the differential current falls below a predetermined limit, a frame sync signal is generated to latch the next and following words into a data latch (34). These are then transferred out to a system upon the generation of a system data clock.

REFERENCES:
patent: 3689872 (1972-09-01), Sieracki
patent: 3925763 (1975-12-01), Wadhwani
patent: 4042783 (1977-08-01), Gindi
patent: 4227178 (1980-10-01), Gergaud et al.
patent: 5054070 (1991-10-01), Eckstein et al.

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