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:
Dec. 05, 2006
Filed:
May. 13, 2004
Guenther Bergmann, Blaustein, DE;
Erwin Dotzauer, Roggenburg, DE;
Holger Vogelmann, Uhingen, DE;
Herbert Knotz, Erbach, DE;
Wolfgang Wernig, Blaustein, DE;
Guenther Bergmann, Blaustein, DE;
Erwin Dotzauer, Roggenburg, DE;
Holger Vogelmann, Uhingen, DE;
Herbert Knotz, Erbach, DE;
Wolfgang Wernig, Blaustein, DE;
Atmel Germany GmbH, Heilbronn, DE;
Abstract
A driver circuit and a method drive an electronic component such as a laser diode with a variable electric current that is controlledly switched between at least two discrete current levels. The driver circuit includes circuit elements that damp ringing or initial transient oscillations that arise when switching the current between the current levels. The driver circuit includes a current mirror having a mirror amplification factor dependent on the frequency of the variable electric current. In order to counteract parasitic capacitances and/or inductances leading to the ringing, an inductance and/or a resistance are connected between the two series circuits making up the current mirror, a capacitance is connected parallel to a reference resistor of one of the series circuits, and/or a capacitance is connected across the voltage supply.