Adaptive equalizer

Details Adaptive equalizer Adaptive equalizer

1998-07-24

2000-10-24

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375376, H03H 730

Patent

active

061378321

ABSTRACT:
Systems and methods are described for adaptive equalizers. A circuit adapted to transform an equalizer input signal at a receiver to approximate an output signal at a transmitter includes an equalizer, a phase matching loop coupled to the equalizer, and an amplitude locking loop coupled to the equalizer. The equalizer can include a number of coarse band segments to provide coarse adjustment, at least one of which includes a number of fine band segments to provide fine adjustment. The systems and methods provide advantages in that multiple cable lengths can be serviced by a single equalizer, variations in the low frequency gain and the location of the zero point due to variations in manufacture and operating temperature are obviated, and a suitable gain can be provided at much higher frequencies.

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patent: 5341106 (1994-08-01), Pettigrew
patent: 5602871 (1997-02-01), Scholz
patent: 5635786 (1997-06-01), Gerrits et al.
patent: 5731737 (1998-03-01), Cranford, Jr. et al.
patent: 5825179 (1998-10-01), Sherman et al.

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