Invention Grant
- Patent Title: Extremely-fine resolution sub-ranging current mode Digital-Analog-Converter using Sigma-Delta modulators
-
Application No.: US16203738Application Date: 2018-11-29
-
Publication No.: US10425099B1Publication Date: 2019-09-24
- Inventor: Sadok Aouini , Ahmed Emara , Gordon Roberts , Mahdi Parvizi , Naim Ben-Hamida
- Applicant: Ciena Corporation
- Applicant Address: US MD Hanover
- Assignee: Ciena Corporation
- Current Assignee: Ciena Corporation
- Current Assignee Address: US MD Hanover
- Agency: Clements Bernard Walker PLLC
- Agent Christopher L. Bernard; Lawrence A. Baratta, Jr.
- Main IPC: H03M3/00
- IPC: H03M3/00 ; H03M1/10
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 DC1 using an nth order 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 DC2 using a 1st order 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.
Information query
