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:
Feb. 19, 1991
Filed:
Jun. 20, 1989
Applicant:
Inventor:
Miki Moyal, Austin, TX (US);
Assignee:
Advanced Micro Devices, Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 53 ; 330253 ; 330261 ; 3072962 ; 3072964 ; 3072965 ; 3072968 ;
Abstract
The invention comprises an operational amplifier circuit having a shielded transistor device whose drain is surrounded by a gate comprising an annular ribbon of polysilicon. The gate is connected to a trackable potential that fluctuates but is keyed to a voltage slightly above the average between the positive and negative circuit bias. The shielded transistor device allows the operational amplifier circuit of which it is a part to function at extended voltage levels of 12 volts.
Moyal, Miki. (1991). Shielded transistor device (U.S. Patent No. 4994891). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4994891
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile