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:
Jun. 30, 1987
Filed:
Oct. 10, 1984
Jacques Guillaumin, Les Lilas, FR;
Jeumont-Schneider Corporation, Puteaux, FR;
Abstract
The invention pertains to a logic circuit with threshold and built-in safety such that any change in the characteristics of its components produces a relative increase of the threshold value. It comprises a comparator (7) one input of which receives a reference d-c voltage (VR) whereas the other input is connected to the junction point of a first and a second resistance (1, 2). A first d-c voltage (V1) of low relative value is applied to the free terminal of the first resistance (1), and a second d-c voltage (V2) of high relative value is applied to the free terminal of the second resistance (2) by means of a third resistance (3). According to the invention, there is applied at the junction point (A) of the second and third resistances (2, 3) a third d-c voltage (V3) of intermediate relative value by means of a fourth resistance (4) in series with a chopping commutator (6).