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. 24, 2019
Filed:
Nov. 29, 2018
Ciena Corporation, Hanover, MD (US);
Sadok Aouini, Gatineau, CA;
Ahmed Emara, Montreal, CA;
Gordon Roberts, Montreal-West, CA;
Mahdi Parvizi, Kanata, CA;
Naim Ben-Hamida, Ottawa, CA;
Ciena Corporation, Hanover, MD (US);
Abstract
A X-bit Digital-to-Analog Converter (DAC) circuit includes an effective X/2-bit coarse DAC configured to produce a coarse bitstream (CBS) from a digital input DCusing an norder Sigma-Delta (ΣΔ) modulator, and to provide a coarse current source based on the CBS, wherein X is an even integer and n is an integer; an effective X/2-bit fine DAC configured to produce a fine bitstream (FBS) from a digital input DCusing a 1order ΣΔ modulator, and to provide a fine current source based on the FBS; and an output configured to form a voltage from the combination of the coarse current source and the fine current source.