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:
Mar. 15, 2005
Filed:
Mar. 07, 2003
James R. Hochschild, Plano, TX (US);
James R. Hochschild, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A common-mode noise reduction circuit () adapted to receive a DIN input (−1, 0, +1), such as from a sigma-delta modulator (), and provide alternating outputs (DoutP, DoutM) such as to reduce the common-mode noise of an H-bridge (). A zero detect circuit (), a pattern generator () and a level generator circuit () provide that the outputs DoutP and DoutM are either both logic 1 or both logic 0, such as to lower the common-mode noise level by a device, such as a H-bridge (). This circuitry () places a zero in the transfer function of the H-bridge () to reduce the common-mode noise, whereby high pass filters shape the noise out-of-band in an over sampled system.