An optical-electrical sub-sampling down-conversion receiver with continuous-time [Sigma] [Delta] modulation
Name
62326142-MIT.pdf
Description
Full printable version
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5.59 MB
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Checksum (MD5)
0f41b277e16abb91f67fccf0de920a67
Author(s)
Park, Matthew (Matthew J.)
Advisor(s)
Michael H. Perrott.
Date Issued
2005
Publisher
Massachusetts Institute of Technology
Abstract
This thesis describes the design and implementation of an optical-electrical sub-sampling down-conversion receiver that employs [Sigma] [Delta] modulation. Accurate sub-sampling of an electrical RF signal in the optical domain is achieved by using a low-jitter mode-locked-laser and a high-bandwidth interferometer. The sub-sampled information is then digitized by an optical-electrical continuous-time (CT) [Sigma] [Delta] analog- to-digital converter (ADC). Here, photodiodes and low-jitter pulses from the mode- locked-laser are leveraged to perform signal clocking and quantizer pre-amplification, overcoming digital-to-analog converter (DAC) clock jitter and quantizer metastability issues that plague traditional electronic implementations. The optical-electrical converter achieves 76.5 dB of SNR (12.4 ENOB) with a 1 MHz signal bandwidth and a sampling rate of 780 MHz. The chip was implemented using a standard bulk 0.18 [mu]m CMOS process from National Semiconductor, occupies a total area of 3 mm2, and consumes 45 mW of power.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.
In title on t.p., [Sigma] and [Delta] appear as the upper-case Greek letters.
Includes bibliographical references (p. 87-89).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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