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 60 for “"Analog to Digital Converter (ADC)"”.
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Variable Precision Tandem Analog-to-Digital Converter (ADC)
<p>This paper describes an analog-to-digital signal converter which varies its precision as a function of input slew rate (maximum signal rate of change), in order to best follow the input in real time. It uses Flash and Successive Approximation (SAR) conversion techniques in sequence.</p> <p>As …
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A zero-crossing based pipelined analog-to-digital converter with supply voltage scalibility
A zero-crossing based pipelined analog-to-digital converter (ADC) has been designed and is fabricated in a 65nm CMOS process. The highly digital implementation characteristic of the zero-crossing detection technique enables energy efficient operation and voltage scaling. Supply voltage scaling …
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Frequency translation method for low frequency variable gain amplification and filtering
This thesis discusses an innovative solution to an industry challenge. A frequency translation method is designed to shift low frequency signals to intermediate frequencies in order to utilize higher-frequency components. This solution, appropriate for applications involving 1-10MHz signals, can …
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Integrated optical analog-to-digital converter
… frequency-demultiplexed wideband analog-to-digital converter (ADC) which has potential to exceed the performance of electronic ADCs by orders of magnitude is studied analytically and numerically. The accuracy of the ADC as a function of its parameters is analyzed and impact of …
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A 4th order continuous-time [Delta] [Epsilon] ADC with VCO-based integrator and quantizer
The use of a VCO-based integrator and quantizer within a continuous-time (CT) [Delta] [Epsilon] analog-to-digital converter (ADC) structure is explored, and a custom prototype in a 0.13 [mu]m CMOS with a measured performance of 81.2/78.1 dB SNR/SNDR over a 20 MHz bandwidth while consuming 87 mW …
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Application of Precision Successive-approximation-register Analog-to-digital Converters for Digital Root-mean-square Calculation
The advancement of semiconductor manufacturing processes has allowed for the availability of powerful microcontrollers at lower costs, granting system designers the flexibility to select between analog and digital signal processing techniques. Enabled by recent developments in low-power successive …
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HandWave : design and manufacture of a wearable wireless skin conductance sensor and housing
… manufacture of HandWave, a wearable wireless Bluetooth skin conductance sensor, and dedicated housing. The HandWave collects Electrodermal Activity (EDA) data by measuring skin conductance over a pair of electrodes. The EDA data signal is used to infer the excitement level of the subject. The …
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Design of a low-power analog circuit for an implantable RFID-enabled device with passive pressure sensor
A low-power analog core for an implantable RFID-enabled pressure measurement system is designed. The analog core includes the power generation block for the system, the clock extractor for the digital core and the pressure sensor data converter. Circuit design constraints of low-power consumption …
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A high-speed cascaded folding and interpolating A/D converter
… and interpolating technique 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 …
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An optical-electrical sub-sampling down-conversion receiver with continuous-time [Sigma] [Delta] modulation
… 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 …
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Optical SNS folding circuit design
… of an integrated optical multi-interferometer analog-to-digital converter (ADC). These types of ADCs can directly digitize the signals from an antenna and play an important role in eliminating the need for intermediate frequency and baseband processing. With resolution greater than 12 bits, …
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Energy-aware DNN Quantization for Processing-In-Memory Architecture
… cost of deep neural network (DNN), many efforts to develop energy-efficient intelligent system have been proposed from dedicated hardware platforms to model compression algorithms. Recently, hardware-aware quantization algorithms have shown further improvement in the energy efficiency of DNN by …
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A square root analog to digital converter to optimally convert photonic signals for computed tomography
The arrival of photons at a given location is a Poisson process with an associated shot noise which rises with the square root of the number of photons received. An analog-to-digital converter (ADC) with a square root transfer function can quantize photonic signals with LSB size kept constant with …
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Design of High-Resolution SAR ADC for Detection of Sub-Cortical Neuron Action Potentials for BMI Applications
… successive approximation register (SAR) analog-to-digital converter (ADC) tailored for sub-cortical neural signal detection. To optimize dynamic range and reduce power consumption, a novel adaptive zoom-and-tracking architecture is introduced, enabling the ADC to dynamically adjust its …
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An ultra low power ADC for wireless micro-sensor applications
Autonomous micro-sensor nodes rely on low-power circuits to enable energy harvesting as a means of sustaining long-term, maintenance free operation. This work pursues the design of an ultra low-power analog-to-digital converter (ADC) whose sampling rate and resolution can be scaled to dynamically …
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Energy-efficient analog-to-digital conversion for ultra-wideband radio
… and communication systems, a focus on the analog or digital circuits in isolation cannot achieve the minimum power consumption. Furthermore, in advanced technologies with significant variation, yield is traditionally achieved only through conservative design and a sacrifice of energy …
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Design of a low power switched-capacitor pipeline analog-to-digital converter
<p>An Analog to Digital Converter (ADC) is a circuit which converts an analog signal into digital signal. Real world is analog, and the data processed by the computer or by other signal processing systems is digital. Therefore, the need for ADCs is obvious.</p><p>In this thesis, several novel …
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0.3V biopotential sensor interface for stress monitoring
… in the case of implantables and health monitoring devices that require long operation lifetime. Exploiting low-voltage techniques in analog design can enable further power savings, which has not been explored much. However, for conventional analog-front-end (AFE) topologies, voltage scaling …
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Ambient ZeroScatter: Ambient BPSK and QPSK Backscatter Communication using Existing Digital I/O Pins
… components such as RF FETs, PIN diodes, or varactors to perform the backscatter modulation function. We demonstrate that completely unmodied digital I/O pins on MCUs and FPGAs can be re-purposed as binary phase-shift keying (BPSK) backscatter modulators in the UHF and microwave bands with zero …
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High-Resolution Nyquist -Rate Analog -to -Digital Converter
This thesis presents a pipelined analog-to-digital converter (ADC) employing a capacitor error-averaging technique with look-ahead decision and digital error correction concepts that has been implemented in a CMOS technology to achieve high linearity and high speed. The capacitor error-averaging …
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