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:
May. 03, 1988
Filed:
Jul. 08, 1986
Thomas H Wong, Sunnyvale, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
An adjustable sense amplifier circuit for read/write control of solid state memory devices is described. In a write mode the circuit includes a write select path, coupled to a current source and coupled to a differential pair of data select transistors, wherein the input data state sets each of two differential pairs formed by the memory element cross-coupled latch, such that the memory element stores selected data. In a sense mode, a second current path is selected wherein an adjustable sense level is provided to each of two differential pairs formed by the memory element. The current source is coupled to a reference voltage source which is independent of the supply voltage. The reference voltage source tracks changes in temperature and also provides low beta compensation for current loss due to the low beta value of transistors in the write and sense paths.