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:
Sep. 27, 1994
Filed:
Feb. 16, 1993
Michael J Henderson, Grass Valley, CA (US);
The Grass Valley Group, Inc., Nevada City, CA (US);
Abstract
A non-linear slew rate limiter for a digital signal compares the digital signal with a reference waveform that has a frequency spectrum that slightly exceeds the passband of a reconstruction filter within a digital to analog converter. Samples of the digital signal are compared with immediately prior samples of an output digital signal to determine the polarity of the slewing of the digital signal, and also are compared with corresponding next samples of the reference waveform to determine whether the slew rate of the digital signal exceeds the slew rate of the reference waveform. If the slew rate of the digital signal exceeds the slew rate of the reference waveform, the sample of the reference waveform replaces the corresponding sample of the digital signal in the output digital signal. Otherwise the sample of the digital signal becomes the output digital signal.