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:
Dec. 08, 1992
Filed:
Jun. 11, 1991
Michiel de Wit, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A sample and hold circuit (24) is provided which includes an input terminal (36) for receiving a time varying input voltage. A first capacitor (14) maintains a first voltage corresponding to a sample of said time varying input voltage. A switch (12) having a control terminal (20) is operable to sample the input voltage by coupling input terminal (36) to first capacitor (14) in response to a sampling signal provided at control terminal (20). At least one second capacitor (58, 86) is provided for maintaining a preselected voltage. Circuitry (40, 42, 68, 106) is provided for selectively applying the sampling signal to control terminal (20) of switch (12) by impressing at least the preselected voltage maintained by second capacitor (58, 86) on control terminal (20).