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:
Jul. 31, 2001
Filed:
Mar. 03, 2000
High performance switched-capacitor filter for oversampling sigma-delta digital to analog converters
Mikael Gustavsson, Eatontown, NJ (US);
Nianxiong Tan, Howell, NJ (US);
Globespan, Inc., Red Bank, NJ (US);
Abstract
An improved SC filter for OSDACs for asynchronous digital subscriber line (ADSL) applications. More specifically, an improved switched-capacitance (SC) filter for an over-sampled digital to analog converter intended for use in a multi-mode analog front end for a host of ADSL applications. The SC filter is configured for low power consumption and for a low-ambient noise floor across the frequencies of interest. The SC filter is further configured to drive a resistive load of a few kohms and for low signal distortion. The SC filter lowers power consumption by decimating the input waveform and reducing the number of operational amplifiers in the circuit.