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PhD Preliminary Oral Exam – Jyotindra Shakya

Narroband Plasmonic Grating Filters and High Dynamic Range Continuous Time Delta Sigma Modulator

Part I: Plasmonic Grating Filters are low cost alternatives to conventional color filters used in Hyperspectral Cameras. State-of-art Hyperspectral Cameras use Fabry-perot filters which require many process steps depending on number of color band desired. An array of Plasmonic Filters with various color bands can be fabricated in a single lithographic process step. In this project an array of 20 Plasmonic Filters were designed, fabricated, tested and used for spectral reconstruction of 12 different samples using novel algorithm for color unmixing. Part II: A high-speed pipelined SAR ADC was designed and fabricated in TSMC65nm process. The pipelined SAR structure allows for time-interleaved sampling and eliminates need for Analog gain as in conventional pipelined ADCs. In addition a high dynamic range (110dB) Continuous Time Delta Sigma Modulator (CTDSM) was designed for audio application. Various novel circuit and architectural techniques are proposed to meet such high dynamic range requirements. Some of the techniques include: Predictive Noise Shaping, Digital Calibration of Feedback DAC, Nested Error-Feedback Noise Shaping,Complimentary boosted switch and an Improved Source Follower which combines the benefits of super source follower and flipped source follower.

Co Advisor: Gabor Temes
Co Advisor: Alan Wang
Committee: David Allstot
Committee: Matthew Johnston
GCR: Yun-Shik Lee

Monday, March 16 at 11:00am to 1:00pm

Kelley Engineering Center, 1007
110 SW Park Terrace, Corvallis, OR 97331

Event Type

Lecture or Presentation

Event Topic

Research

Organization
Electrical Engineering and Computer Science
Contact Name

Dakota Nelson

Contact Email

eecs.gradinfo@oregonstate.edu

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