Programmable peak detector for use with zero-overhead Class...

Details Programmable peak detector for use with zero-overhead Class... Programmable peak detector for use with zero-overhead Class...

2006-04-18

2006-04-18

Tran, Sinh (Department: 2646)

Telephonic communications

Subscriber line or transmission line interface

C330S297000

Reexamination Certificate

active

07031457

ABSTRACT:
A digital input signal is analyzed by a peak detector (210) configurable to trigger a first logic signal (260) if the peak detector detects the digital input signal level crossing a certain threshold. The threshold value can be modified by an overhead. The amplifier (250) employs a plurality of supply rails of differing voltages (253, 255) as a function of the logic signals. A digital signal delay element (220) may delay the signal to allow sufficient time for the amplifier to switch between supply sources. A logic delay element (280) may delay transmittal of the first logic signal by the peak detector to compensate for signal delay caused by a filter. A hold element (270) ensures that the first logic signal is applied to the output amplifier for a given amount of time.

REFERENCES:
patent: 4721919 (1988-01-01), LaRosa et al.
patent: 4873493 (1989-10-01), Fujiwara
patent: 5929702 (1999-07-01), Myers et al.
patent: 6028486 (2000-02-01), Andre
patent: 6323733 (2001-11-01), Gorcea et al.
patent: WO 01/67598 (2001-09-01), None

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