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:
Sep. 14, 2010
Filed:
Oct. 05, 2007
Paulius Mindaugas Mosinskis, Richlandtown, PA (US);
Paulius Mindaugas Mosinskis, Richlandtown, PA (US);
Lightwire, Inc., Allentown, PA (US);
Abstract
An AC-coupled differential drive circuit for an optical modulator is utilized, where a common 'node' is defined between top (or bottom) plates of the modulator arms themselves (the 'arms' of a modulator taking the form of MOS capacitors). A low pass filter is disposed between the differential driver output and the modulator's common node to provide the desired AC coupling by filtering out the DC bias voltage of the driver circuit itself without the need for a separate, external AC coupling capacitor. An independent, adjustable DC potential can then be applied to the common node, and will appear in a balanced manner across each arm of the modulator to provide the desired DC bias for the modulator independent of the DC bias of the driver circuit.