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:
Jun. 21, 2005
Filed:
Mar. 13, 2001
Lucien Johannes Breems, Maassluis, NL;
Eise Carel Dijkmans, Eindhoven, NL;
Henricus J. Kunnen, Valkenswaard, NL;
Lucien Johannes Breems, Maassluis, NL;
Eise Carel Dijkmans, Eindhoven, NL;
Henricus J. Kunnen, Valkenswaard, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A quadrature devicefor a communication device, receiver, transmitter, transceiver, telephone, mixer, modulator or demodulator comprises I and Q signal paths and corresponding signal paths componentsI,Q;I,Q;I,Q showing a mismatch. The devicecomprises switching circuitry'″ for data dependently exchanging the I and Q signals in the I and Q paths in order to improve adverse effects, such as reduction of leakage of quantisation noise from the image band to the signal band in a quadrature modulator. Even mismatch effects between digital to analog converters (DAC's) in a feedback path of a sigma delta (ΣΔ) modulator are compensated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile