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. 11, 2000
Filed:
Apr. 28, 1995
Applicant:
Inventors:
James Carter Bach, Carmel, IN (US);
John J Baker, Kokomo, IN (US);
Robert Joseph Stock, Arcadia, IN (US);
Richard J Szep, Peru, IN (US);
Gerlad A Kilgour, Kokomo, IN (US);
Assignee:
Delco Electronics Corp., Kokomo, IN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
327170 ; 327379 ;
Abstract
A modulator has an FET output driver for applying repetitive pulses to an inductive load. A predriver comprises a resistor and capacitor in parallel across the FET source and gate for shaping the control voltage. A constant current source, turned on and off by an input signal, couples the shaping circuit to ground. The resistor and capacitor values determine the rate of control voltage change which is the same for turn-on and turn-off, to control the driver current slew rate for minimizing RFI emissions.