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. 25, 2010
Filed:
Jun. 23, 2008
Gwilym Francis Luff, Great Shelford, GB;
Gwilym Francis Luff, Great Shelford, GB;
Intersil Americas Inc., Milpitas, CA (US);
Abstract
A chopper stabilized amplifier has differential inputs, an output, and a low frequency path and a high frequency path from the differential inputs to the output. Chopping occurs, at a chopping frequency, of a differential signal at differential inputs and outputs of an amplifier stage of the low frequency path to thereby produce a chopped differential signal that has a DC offset of the amplifier stage frequency shifted up to the chopping frequency. A continuous time filter embedded between a pair of further amplifier stages of the low frequency path is used to attenuate chopper frequency ripple resulting from the chopping at the chopping frequency. Additionally, a buffer is used to allow feedback through a compensation capacitor for the low frequency path, yet prevent chopper frequency ripple from feeding forward through the compensation capacitor to the output of the amplifier.