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:
Apr. 23, 1991
Filed:
Jun. 12, 1989
Applicant:
Inventors:
Michele Zisa, Comiso, IT;
Sergio Palara, Acicastello, IT;
Assignee:
SGS-Thomson Microelectronics s.r.l., Milano, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ; H03K / ;
U.S. Cl.
CPC ...
361 91 ; 307542 ; 307584 ; 361111 ;
Abstract
The power device has a power supply terminal, a load terminal connected to earth by means of an inductive load and a control terminal connected to a circuit with inlet for an alternating control signal. Whenever the power device is turned off, a switching element hitches the voltage of the control terminal to that of the load terminal, which is forced to fall by the inductive load. There is provided a discharge circuit of the inductive load, which includes means having a predetermined threshold which are fired when the voltage of the load terminal falls down to said predetermined threshold.