The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1993
Filed:
Nov. 20, 1991
Robert F Lay, Elgin, IL (US);
Motorola, Inc., Schaumburg, IL (US);
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.