Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 692 for “"Modulator"”.
-
Swift Electro-Optic Modulator
… of a polarimetric in-fiber electro-optic modulator. The modulator is based on the application of a nonlinear optical polymer, NLOP, film into the evanescent field of a D-fiber. In this way electric fields applied to the NLOP can be used to influence the light propagating through the fiber. …
-
Self-Oscillating Unified Linearizing Modulator
… input voltage varies. A feedforward pulse width modulator is introduced in [39] to realize a large-signal control-to-output linearity. The static conversion ratio is divided into numerator and denominator as the functions of duty cycle. An integrator with reset clock signal helps to determine the …
-
A predictive adaptive delta modulator
… communication using a predictive adaptive delta modulator. This method is based on an estimation of the input waveform and an encoding of the signal into a digital sequence. The Kalman Filter does this estimation to filter out some of the noise, thus increasing the fidelity of the output to the …
-
Germline Genetic Modulator of Cancer Metastasis
<p>Metastasis formation is the most critical determinant of cancer survival outcome. Identifying patients at risk for metastatic relapse facilitates clinical decision and the use of appropriate adjuvant therapy, thus having a profound impact on patient survival. A central dogma in cancer is that …
-
Extracellular adenosine as a novel neuroimmune modulator
Adenosine is a pleotropic purine nucleoside with actions ranging from neurotransmission to immunomodulation. Pathologic processes that trigger cellular stress and damage also cause significant increases in local and systemic concentrations of adenosine. Coinciding with elevation in adenosine is an …
-
Hybrid microplasma-semiconductor transistor and frequency modulator
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2021-12-01
-
A bandpass sigma delta modulator IF receiver
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
-
MEMS spatial light modulator for holographic displays
… The approaches use a diffractive spatial light modulator (SLM) built using microelectromechanical system (MEMS) technology. Several related MEMS SLMs are reviewed. In particular, the capabilities of Silicon Light Machines' Grating Light Valve (GLV T) and the Polychromator by Honeywell, Sandia, …
-
A user level modulator file-system infrastructure
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
-
A fourth order [Sigma] [Delta] bandpass modulator
A fourth order bandpass [Sigma] [Delta] modulator is proposed to digitize signals from a MEMS gyroscope. The modulator samples the amplitude-modulated signal at eight times the carrier frequency and achieves an SNR of 82dB with a sampling frequency of 640kHz and a bandwidtn o 1.oKnz. ms document …
-
Terfenol based optical phase modulator and magnetometer
Two new fiber optic magnetostrictive phase modulators and magnetometers using the highly magnetostrictive rare-earth iron compound Tb<sub>x</sub>Dy<sub>l-x</sub>Fe₂ are investigated. They demonstrated to have a high sensitivity, dynamic range, minimum field detectability, and a better structural …
-
Design and fabrication of a recycled carrier modulator
… the substrate material that was selected for the modulator. Factors such as material compatibility (adhesion), and ease of processing were carefully considered. Numerical simulations were conducted to determine the effects that the different grating materials have on the reflection and …
-
ALL-OPTICAL DELTA-SIGMA MODULATOR DESIGN AND IMPLEMENTATION
… to design and implement all-optical delta-sigma modulator (ODSM) has been expanded. The two main blocks of this modulator are “leaky integrator” and “bi-stable switch” designed and implemented by using active element like semiconductor optical amplifier (SOA) and other passive elements like …
-
TIMP-1 as a Modulator of Inflammatory Pain
The prevalence and financial impact of chronic pain is substantial, and the presence of unresolved inflammation predicts its development. However, the mechanisms underlying unresolved inflammation are not well understood. Therefore, investigation of pathways involved in resolution of inflammatory …
-
Construction and characterization of a universally tunable modulator
… and characterization of a Universally Tunable Modulator (UTM), capable of producing just such combinations. The UTM was prototyped by modifying a New Focus 4104 amplitude modulator. With the application of feedback control of fabry-perot cavities in mind, the UTM was characterized using a test …
-
A Comparator-Based Switched-Capacitor delta sigma modulator
… an industrial standard second order delta-sigma modulator originally based on op-amps. Due to the differences between CBSC and op-amp, a few architectural changes are necessary for the original modulator. Finally, the performance of transistor level simulation of this CBSC based modulator is …
-
An electrically driven 8-14µm band solid-state modulator
The need for a solid state broadband modulator that is efficient and compact, to replace the functionality of mechanical choppers used to modulate pyroelectric detector signals, has existed for some time. Systems where mechanical solutions are undesirable, especially when there are space and power …
-
Neuronal Protection by a Novel C-terminal Hsp90 Modulator
… was to characterize a novel, non-toxic Hsp90 modulator, KU-32, which protects primary cortical neurons against Aβ1-42, a toxic peptide found in AD brain. Pharmacokinetic studies indicated that KU-32 is blood brain barrier permeable and orally bioavailable. Using two AD mouse models, JNPL3 and …
-
Asynchronous direct digital synthesis modulator implemented on a FPGA
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
Page 1 of 35