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:
Oct. 07, 1997
Filed:
Jul. 12, 1995
Applicant:
Inventors:
Gregory A Racino, Austin, TX (US);
Kenneth Obuszewski, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361212 ; 361111 ;
Abstract
An integrated circuit (20) includes an ESD protection circuit (50) to protect it from excessive electrostatic discharge voltages. The ESD protection circuit (50) includes a diode (51) in series with a silicon controlled rectifier (SCR) (60) connected between an input signal line (42) and a power supply voltage terminal. Unlike conventional protection circuits, the ESD protection circuit (50) allows the voltage on the input signal line (42) to extend well beyond positive and negative power supply potentials, and only becomes conductive to discharge voltages which are outside of this extended range.