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:
Aug. 21, 1990
Filed:
Jul. 28, 1989
Applicant:
Inventor:
Valdis E Garuts, Beaverton, OR (US);
Assignee:
Tektronix, Inc., Beaverton, OR (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
307353 ; 307358 ; 307494 ; 328151 ;
Abstract
A sample and hold network is provided having an analog multiplier that multiplies the analog input signal by a sinusoidal strobe signal to produce a multiplied signal. The multiplied signal is filtered by a bandpass differentiating filter and is combined in a differential amplifier with the analog input signal to yield a periodically sampled and held version of the analog input signal. The bandpass differentiating filter attenuates or eliminates undesirable DC and frequency components.