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:
Nov. 30, 1982
Filed:
Jul. 01, 1980
Applicant:
Inventors:
John D Hatchett, Scottsdale, AZ (US);
Andrew S Olesin, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
307353 ; 307228 ; 307510 ; 328151 ;
Abstract
A method of using a sample and hold circuit to obtain a substantially ripple free voltage on the holding capacitor is provided by holding the charge capacitor at a constant voltage during the sampling time and by not routinely charging the charge capacitor to the maximum potential available. This provides a virtually constant voltage from which the holding capacitor can be charged. The level to which the charging capacitor is charged is controlled by an error signal. This error signal is reflected onto the holding capacitor, and is used as an output for the sample and hold circuit.