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. 17, 1994
Filed:
Dec. 31, 1991
Applicant:
Inventors:
Vanni Poletto, Camino, IT;
Michelangelo Mazzucco, Santa Maria Del Tempio, IT;
Assignees:
Marelli Autronica S.p.A., Milan, IT;
SGS-Thomson Microelectronics s.r.l., Milan, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307355 ; 307241 ; 307255 ; 307270 ; 307494 ;
Abstract
The amplitude of the hysteresis of the circuit is determined principally by the intensity of the current produced by a generator by means of a 'band gap' reference voltage, an internal resistance of the circuit, and the resistances connected to the emitters of the input-stage transistors, enabling a high degree of precision to be achieved. The inputs of the circuit are defined by the bases of the input-stage transistors and therefore have high impedance. The preferred application is for forming interface circuits for sensors to be fitted in motor vehicles.