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. 26, 2002
Filed:
Aug. 23, 2000
Henrik T. Jensen, Brentwood, CA (US);
Gopal Raghavan, Thousand Oaks, CA (US);
HRL Laboratories, LLC, Malibu, CA (US);
Abstract
Several delta-sigma modulator circuits and a single quantizer provide analog-to-digital conversion for multiple frequency bands. A wideband mode is provided by coupling an analog signal to be digitized directly to a quantizer. Narrowband modes are provided by switching the analog signal to be digitized into one of several delta-sigma modulator circuits. Noise shaping and filtering by the delta-sigma modulator circuits result in improved signal-to-noise-and-distortion performance and increased resolution. Performance is further enhanced by feeding back multiple bits output by the quantizer to the delta-sigma modulator circuits. The delta-sigma modulator circuits can be either continuous time or discrete time delta sigma modulators.