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.
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Showing 1 to 20 of 50 for “"delay line"”.
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A delay line architecture for high-speed analog-to-digital converters
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2002.
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A high-speed, high-resolution optical delay line for stellar interferometry applications
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1986.
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The Applicability of the Tap-Delay Line Channel Model to Ultra Wideband
… to verify whether or not the traditional tap-line delay channel model is still applicable to UWB. One essential task involved in channel modeling is deconvolving the channel impulse response from the measurement data. Both frequency domain and time domain techniques were studied in this work. …
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Delay Line Based Adc And High Frequency Pulse Generation In Electrical Lc Latices
… solution for signal difference amplification, delay amplification is used. In the first chapter, in order to verify the benefit from a time-domain ADC, a 125 MS/s 8bit delay-line based ADC is studied and implemented as a circuit using TSMC 65 nm CMOS process. Simulation results show that, with …
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Scalable and Reconfigurable True-Time Delay Line for Integrated Radio-Frequency Recurrent Neural Processors
This paper presents a scalable and tunable delay-line architecture for analog recurrent neural networks (RNNs) operating directly in the RF-domain. Previous research has shown the RF-domain RNNs are capable of performing real-time anomaly detection in wireless systems while reducing the inference …
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Superconducting coplanar delay lines
Two 25 ns wideband HTS delay lines with a novel double-spiral meander line (DSML) structure are designed, fabricated and measured. One is based on the conventional coplanar waveguide (CPW), and the other based on a conductor-backed coplanar waveguide (CBCPW). Systematic design work is presented in …
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High temperature thin film superconductors and microstrip spiral delay lines
… and characterization are provided. The delay line design method is presented and various printed delay lines are constructed. The experimental results are presented and discussed.
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Dark signalling and code division multiple access in an optical fibre LAN with a bus topology
… through the SLIM (Single Light-source with In-line Modulation) configuration in which there is a continuously-operating light source at the head-end of a folded bus, and modulators at the nodes to impose signals on the optical field in the form of pulses of darkness which propagate along the …
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Elasticity Measurement at High Temperatures
A magnetostrictive delay line technique is used to excite the resonant modes of vibration of thin discs. The temperature variations of Poisson's Ratio and Young's modulus are measured using these modes. The elastic constants of a variety of grades of graphite, including pyrolytic graphite (which …
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An Analysis of Traveling - Wave Mixer Structures (Signal Processing)
Models are developed for traveling-wave delay line transfer functions and for Schottky barrier diodes. These are combined to form models of real time convolver devices. These functions are implemented utilizing acoustic charge transport technology, an approach which permits broad band delay lines, …
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A Continuous-Time Pipeline ADC with Reduced Sensitivity to Clock Jitter
… clock generator. The continuous-time (CT) pipeline ADC is an emerging architecture that combines the benefits of a discrete-time pipeline ADC and a continuous-time ∆Σ ADC architecture. In this thesis, we explore the clock jitter sensitivity of the CT pipeline ADC. We derive the SNR limitations …
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Fibre-based devices for next generation photonics communication systems
… conjunction with the concepts of optical fibre delay line filters and fibre Bragg gratings, a number of novel fibre-based devices, potentially suitable for applications in the future wireless photonics communication systems, have been realised. Special single-mode fibres, namely, the high …
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Getting the most out of C.O.AS.T
… are original except where otherwise stated. The delay line described in chapter 7 is based on the design developed by Connes [16], but the specific implementation is my own. Chapter 8 describes experiments which are a continuation of the work of Baldwin et al. [6] and Haniff et al. [37], but the …
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Processing Submillisecond Timing Differences in a Model Electrosensory System
… to one edge of a stimulus and variably delayed excitation corresponding to one or both edges of a stimulus. Other circuits that detect submillisecond timing differences rely either on precisely-timed inhibition or delay-line coincidence detection. I demonstrate a novel mechanism by which …
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Design and Analysis of an Electronically Steerable Microstrip Patch and a Novel Coplanar Waveguide (CpW) Fed Slot Antenna Array
… beam scanning array implemented using microstrip delay lines controlled using GaAs SPDT switches. Then the study and design of a wideband Coplanar Waveguide (CPW)-fed slot phased array antenna is presented. In both cases the array beam scanning properties are elucidated by incorporating the …
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(VDL)² : a jitter measurement built-in self-test circuit for phase locked loops
… which stands for Variable Vernier Digital Delay Locked Line, implements both cycle-to-cycle and phase jitter measurements, by using a digital delay locked loop and a 60 stage Vernier delay line. This achieves a nominal jitter resolution of 10 ps with a capture range of +/- 150 ps and does …
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Narrow frequency-band laser with optical feedback
… D₂ transition wavelength, [gamma] = 852 nm. The linewidth of this diode is reduced by several orders of magnitude by means of optical feedback from an external cavity. The system is further stabilized by locking the path length between diode and cavity to optimize coupling between them. The …
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Microwave engineering in superconducting nanowires for single-photon detection
… nanowires into kinetic-inductive transmission lines and use them to devise new single-photon detector architectures. Through impedance engineering, we developed a superconducting tapered nanowire detector that has increased output voltage, reduced timing jitter, and most importantly, the …
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A low power controller for a MEMS based energy converter
… for the system. The design of a programmable delay line based digital controller and optimization of the accompanying complementary power switches is reviewed. Results from the fabricated controller are presented and discussed. The design of a self-locking controller, which is based on the …
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New opportunities for photon storage and detection: an exploration of a high-efficiency optical quantum memory and the quantum capabilities of the human eye
… have developed a robust reconfigurable optical delay line quantum memory that compares favorably with competing methods. Our memory is capable of photon storage with an unprecedentedly high time-bandwidth product, high free-space transmission over the range of 10 $\mu$s, and high fidelity. These …
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