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:
Jan. 18, 1977
Filed:
Mar. 05, 1975
Richard H Heeren, Palatine, IL (US);
Teletype Corporation, Skokie, IL (US);
Abstract
In one example, a generally conventional flip-flop circuit is used, including a pair of input field-effect transistors having their gates connected respectively to a pair of circuit nodes A and B. During a preset portion of the cycle, both nodes A and B are preset to an initial reference potential V.sub.R, set so that the transistors turn partially ON and act as variable resistors. Thereafter, an unknown voltage V.sub.X to be sensed is connected to node A, V.sub.X being equal to V.sub.R .+-. .DELTA.V. The flip flop then responds to differential conductivity between the transistors, to produce a binary output voltage at one of two levels set by the sense of .DELTA.V, plus or minus. In a semiconductor RAM circuit, selected memory cell capacitors are connected in sequence to node A, and the flip-flop circuit senses the cell charge and produces an amplified output representative thereof, which is later fed back to the memory cell to refresh the charge originally stored therein.