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:
Sep. 20, 1994
Filed:
Feb. 12, 1993
Marc H Ryat, Fort Collins, CO (US);
SGS-Thomson Microelectronics, Inc., Carrollton, TX (US);
Abstract
An operational amplifier input stage has at least two positive input transistors and one negative input transistor for providing more accurate and efficient limiting or rectification in limiter and rectifier circuits. The two positive input transistors are connected in parallel having a common drain connected to one side of a load and the negative input transistor's drain is connected to the other side of the load. The sources of all transistors are connected to a common node which is connected to a constant current source. This arrangement enables simplistic high accuracy limiting and rectifier circuits, having a reduced number of extrinsic components, thereby reducing unwanted speed limitations, to be realized. The operational amplifier input stage is also very useful in low supply circuit applications.