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:
May. 17, 2016
Filed:
Dec. 15, 2012
Iad Gesellschaft Für Informatik, Automatisierung Und Datenverarbeitung Mbh, Grosshabersdorf, DE;
Hermann Hampel, Grosshabersdorf, DE;
Ulrich Berold, Nuremberg, DE;
Abdul Rahman Hanoun, Heilsbronn, DE;
Johannes Hampel, Grosshabersdorf, DE;
Oliver Eckhof, Gutenstetten, DE;
Manfred Deinzer, Neunkirchen am Sand, DE;
Andreas Bänisch, Fürth, DE;
IAD GESELLSCHAFT FÜR INFORMATIK, AUTOMATISIERUNG UND DATENVERARBEITUNG MBH, Grosshabersdorf, DE;
Abstract
A delta-sigma modulator for a switching amplifier, which achieves a high signal-to-noise ratio (SNR) in the multi-MHz range and keeps the noise-transfer function over the useful frequency range as low and as flat as possible. A series connection of a parallel-serial converter and a downstream swap element for the serial output signal yof the parallel serial converter is connected to the multi-bit output of the delta-sigma-modulator. The swap element swaps, based on the last bit value 0 or 1 of a preceding word in the resulting output signal y, the sequence of the binary zeroes and ones of the current word, where present, and then an input signal is fed to the delta-sigma-modulator. The signal is capable of having a frequency range above 25 kHz, and is prepared with a low oversampling ratio and a high SNR. And, 1-0 or 0-1 transitions are largely eliminated at the word boundaries.