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:
Jun. 20, 1989
Filed:
Dec. 07, 1987
Glenn Bateman, Redmond, OR (US);
Donald L Brand, North Ridge, CA (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A digital time base with analog interpolation provides a variable reference voltage to assure that the period of an analog ramp between a zero value and a maximum value is equal to the time interval between range clock pulses. A time base error is determined by establishing a zero reference level on a test pulse rising edge corresponding to the zero value of the analog ramp, and then establishing a maximum level on the test pulse corresponding to the maximum value of the analog ramp initiated one clock pulse prior to the test pulse. The difference between the two levels on the test pulse represents the time base error. A microprocessor provides a corrected reference voltage as the maximum value so that the maximum delay of the analog ramp equals the time interval between clock pulses.