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. 11, 1984
Filed:
Jun. 18, 1982
Marshall B Borchert, Aurora, NE (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A digital time base for producing sample clock pulses is provided with a control circuit to permit coherent switching from one sample rate to another. A plurality of predetermined sampling rates and number of samples to be acquired at each rate are stored in a memory. The predetermined sampling rates provide count moduli to a counter which divides the frequency of a base clock in accordance therewith to produce the actual sample clock pulses. A counter is provided to count the sample clock pulses, and when the desired number of pulses are generated, a next succeeding sampling rate and number of samples to be acquired are accessed from the memory. The rate switching to change the count modulus takes place between last sample clock pulse generated for a particular sampling rate and the next succeeding base clock pulse so that such switching is coherent.