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. 14, 2004
Filed:
Jan. 31, 2002
Claus Erdmann Furst, Roskilde, DK;
Sonion A/S, Roskilde, DK;
Abstract
A method for designing a single loop Sigma Delta Modulator, and a single loop Sigma Delta Modulator. A microphone comprising the above Sigma Delta Modulator (SDM) and a cellular phone or hearing aid incorporating the microphone. A design algorithm for an SDM is described said method resulting in a SDM with a maximum SNR for a given NTF order and the method assures stability while still keeping the distortion in the output signal at a minimum for signals exceeding MSA. The method further takes the presence of non idealities in i.e. components into consideration and makes the SDM less sensitive to these non idealities. Furthermore the method tailors the coefficients and the design of the NTF to fit a low power low voltage integrated circuit implementation.