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:
Sep. 08, 2015
Filed:
Nov. 14, 2014
Gil M. Raz, Concord, MA (US);
Gil M. Raz, Concord, MA (US);
SYSTEMS & TECHNOLOGY RESEARCH, LLC, Woburn, MA (US);
Abstract
A system for reconstructing broadband analog signals from digital information includes a digital processing unit for decomposing a digital input signal into a plurality of multirate, digital input signal sub-components with optimized quantization levels, and a digital-to-analog converter (DAC) bank for converting the plurality of digital input signal sub-components into a corresponding set of analog signal sub-components, which are then combined and time-aligned. The digital processing unit preferably includes a multirate filterbank for separating the digital input signal through discrete wavelet decomposition, such through Haar wavelet decomposition. The DAC bank includes an array of digital-to-analog converters (DACs) with sample rates that vary by a constant factor. By combining the broadband capabilities of one or more relatively fast DACs with the accuracy associated with one or more relatively slow DACs, the digital-to-analog conversion system is able to achieve high bandwidth capabilities at an acceptable level of dynamic range.