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 28 for “"A/D converter"”.
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Pipelined multi-step interpolating A/D converter
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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A 19-bit monolithic charge-balancing A/D converter
… the Modified Landsburg ADC, a high-resolution converter optimized for minimum cost and die area. Switch resistance cancellation, charge-injection compensation and auto-zero methods are used to build a simple and robust ADC which will operate reliably across the military temperature range. …
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A high-speed cascaded folding and interpolating A/D converter
… has been introduced to CMOS analog-to- digital converter (ADC) in the 1980's. It has successfully reduced the number of comparators required while preserving the benefits of a flash ADC. However, similar to flash ADC, folding and interpolating ADC is also limited to low resolution, due to its …
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Integration of an imaging system and A/D converter system
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Comparison of two bandpass delta-sigma A/D converter architectures
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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A pixel-level A/D converter for the imaging array of an advanced interferometer
… result of the analysis, the voltage-to-frequency converter is also discarded because comparator inconsistencies degrade the accuracy below specifications. The sigma-delta converter individually meets the imaging array requirements, but high power supply dissipation, large parasitic capacitance and …
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Wide-Dynamic-Range Continuous-Time Delta-Sigma A/D Converter for Low-Power Energy Scavenging Applications
… rely on wide-dynamic-range sensors and A/D converter systems. For most photo-detector-based applications, the input-current is integrated onto a capacitor, either with a variable time, or a variable capacitor value, followed by a sample-and-hold and a voltage A/D converter. The penalty for …
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Analog to digital converters for CMOS imagers
A/D converters for single chip CMOS imagers have often been designed using the column-parallel approach, employing a slow A/D converter for each column of the sensor array. This thesis investigates a serial approach utilizing a single fast A/D converter to process all of the imager pixels. If power …
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Design and Realization of a Single Stage Sigma-Delta ADC With Low Oversampling Ratio
… a high speed and high resolution sigma-delta A/D converter. This dissertation focuses on the design of a single-stage sigma-delta A/D converter with very low oversampling ratio for the wireless application. An architecture for a multibit single-stage delta-sigma A/D converter with two-step …
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Time-based circuits for communication systems in advanced CMOS technology
… conversion. In this work, we present A/D converters and an RF modulator based on ring oscillators in deep sub-micron CMOS processes. We introduce a VCO-based [sigma][delta] A/D converter utilizing a voltage-controlled ring oscillator (ring VCO) as a continuous-time integrator. We propose …
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Design and Implementation of a Pilot Signal Scanning Receiver for CDMA Personal Communication Services Systems
… the dynamic range of the analog-to-digital (A/D) converter at its input. This necessitated the design of an automatic gain control (AGC) mechanism, which is digitally implemented in this receiver. Simulation studies were undertaken to assist in the design and implementation of the pilot signal …
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Multisensor Signal Processing: Theory and Algorithms for Image -Based Rendering and Multichannel Sampling
… operators, analog analysis filters, slow A/D converters, digital expanders, and digital synthesis filters to approximate a fast A/D converter. The synthesis filters are to be designed to minimize the maximum gain of an induced error system. We show the equivalence of this system to a digital …
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Design and Analysis of Charge-Transfer Amplifiers for Low-Power Analog-to-Digital Converter Applications
… of CTAs or their utility in precision A/D converters. Accordingly, this dissertation presents several advancements related to the design and analysis of charge-transfer amplifiers for low-power data conversion.</p> <p>First, an analysis methodology is proposed which leads to a deterministic …
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Computerized cardiac mapping system.
… to a personal computer via a multiplexing A/D converter. The computer controls the data acquisition process and stores the data in the memory. Activation times of the heart are estimated by a computer algorithm and displayed on a screen. The digitized waveforms and the vertical time marker of …
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A low-power analog logarithmic map circuit with offset and temperature compensation for use in bionic ears
… implants. A logarithmic current-mode A/D converter with temperature compensation and automatic offset calibration is presented in this paper. It employs a dual-slope, auto-zeroing topology with a 60 dB dynamic range and 300 Hz sampling rate, for capturing the envelope of speech signals in …
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Synchronous Sampling Sideband Orders from Helical Planetary Gear Sets
… locked to the rotating system controls the A/D converter to sample at constant shaft angle increments. The phase-locked nature of SS allows the use of vector averaging to significantly lower the noise floor and improve the representation of the order domain. In this work, the advantages of using …
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The Design and Implementation of a Nanosatellite State-of-Health Monitoring Subsystem
… CPU. In addition, discrete I/O functions and A/D converter interfaces were developed for system health monitoring and the spacecraft Attitude Determination and Control System (ADCS).
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Custom High-Speed ADC for mmWave Digital Beamformers
… higher data rates has placed pressure on A/D converter systems to achieve a higher sample rate and bandwidth. This thesis aims to explore and implement a nascent idea of using a reconfigurable, oversampled 1-bit converter to achieve a high signal bandwidth and lower power consumption for …
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A high-speed, low-power analog-to-digital converter in fully depleted silicon-on-insulator technology
… ultra-low-power, six-bit flash analog-to-digital converter fabricated in a fully depleted silicon-on-insulator CMOS technology. Silicon-on-insulator CMOS technology provides a number of benefits for low-power low-voltage analog design. The full dielectric isolation of the silicon island, where the …
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Signal Acquisition and Tracking for a Software Gps Receiver
… GPS receiver board. An analog-to-digital (A/D) converter then digitizes the output signal from the RF front-end. The data is then processed using MATLAB programs to achieve acquisition and tracking of the GPS signals. The software GPS receiver can perform acquisition and tracking using different …
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