Comb filter including a data overflow monitor, and a radio inclu

Details Comb filter including a data overflow monitor, and a radio inclu Comb filter including a data overflow monitor, and a radio inclu

Filed on

1991-11-20

Date issued

1993-07-13

Examiner

Malzahn, David H.

Patent Class

Boots, shoes, and leggings

Other Related Categories

G06F 1531

Type

Patent

Status

active

Patent number

052279910

Description

ABSTRACT:
A monitor (102) is suitable for monitoring the data integrity of a comb filter (101). Generally, the filter will include at least one differencer stage, at least one buffer stage, and at least one integrator stage, including an output integrator stage (500). The output integrator stage will include a most-significant input bit (150) ("I"), a most-significant output bit (130) ("O"), and a carry bit (140) ("C"). In one embodiment, the monitor includes a detector (600) for detecting an overflow condition in the filter based on the equation (inverse C) * (O) * (I)+(C) * (inverse O) * (inverse I). The monitor also includes a waveform generator (700) that, in response to the occurrence of an overflow condition, generates a resetting waveform (170) of a predetermined shape and time duration, that is then coupled to the resetting terminals of all stages in the filter.

REFERENCES:
patent: 4215415 (1980-07-01), Kanemasa
patent: 4223389 (1980-09-01), Amada et al.
patent: 4507725 (1985-03-01), Christopher et al.
patent: 5150318 (1992-09-01), Kontani et al.

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