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You searched for subject:(inverter based OTA). Showing records 1 – 2 of 2 total matches.

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Delft University of Technology

1. D'Urbino, M. (author). An Element-Level Sigma-Delta ADC for Ultrasound Imaging.

Degree: 2017, Delft University of Technology

This work presents an architecture capable of digitizing every channel of an ultrasound transducer array independently and simultaneously. This feature is achieved by exploiting the frequency response of the piezoelectric transducer in order to save area and reduce to a minimum the required building blocks of the ADC. The transducer is used as an electro-mechanical resonator, which is embedded in a band-pass continuous-time, multi-bit ΣΔ modulator. This converter relies entirely on the noise shaping provided by the transducer, which proves to be sufficient to reach the required specifications. Each converter only includes an inverter-based transimpedance amplifier, a variable gain amplifier for time-gain compensation and a 3-bit tracking quantizer, which comprises two comparators and two DACs. A prototype chip has been fabricated in TSMC 0.18𝜇𝑚 technology, featuring 20 channels, with one ADC per channel, and 20 parallel high-speed LVDS transmitters to convey the bitstreams out to the measurement system. The whole modulator, clocked at 200𝑀𝐻𝑧, achieves an area of 150𝜇𝑚 × 150𝜇𝑚, a power consumption of 800𝜇𝑊 and an SNR of 47dB in a 75% bandwidth around a transmit frequency of 5𝑀𝐻𝑧. The measurements clearly show the desired noise shaping behaviour, thus proving that the proposed concept is valid.

Electrical Engineering, Mathematics and Computer Science

Electronic Instrumentation

Advisors/Committee Members: Pertijs, M. (mentor).

Subjects/Keywords: Inverter-based OTA; Band-pass ΣΔ; Electro-mechanical Resonator; Tracking Quantizer

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APA (6th Edition):

D'Urbino, M. (. (2017). An Element-Level Sigma-Delta ADC for Ultrasound Imaging. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b39345e6-3dbc-4358-89be-088dc1403ab9

Chicago Manual of Style (16th Edition):

D'Urbino, M (author). “An Element-Level Sigma-Delta ADC for Ultrasound Imaging.” 2017. Masters Thesis, Delft University of Technology. Accessed September 21, 2020. http://resolver.tudelft.nl/uuid:b39345e6-3dbc-4358-89be-088dc1403ab9.

MLA Handbook (7th Edition):

D'Urbino, M (author). “An Element-Level Sigma-Delta ADC for Ultrasound Imaging.” 2017. Web. 21 Sep 2020.

Vancouver:

D'Urbino M(. An Element-Level Sigma-Delta ADC for Ultrasound Imaging. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2020 Sep 21]. Available from: http://resolver.tudelft.nl/uuid:b39345e6-3dbc-4358-89be-088dc1403ab9.

Council of Science Editors:

D'Urbino M(. An Element-Level Sigma-Delta ADC for Ultrasound Imaging. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:b39345e6-3dbc-4358-89be-088dc1403ab9

2. Rajendran, L. (author). Design of an Energy-Efficient Interface Circuit for a MEMS-based Capacitive Pressure Sensor.

Degree: 2013, Delft University of Technology

This thesis presents an incremental ?? capacitance-to-digital converter (CDC) that serves as an interface circuit for a MEMS-based pressure sensor. The thesis presents a systematic analysis of the CDC and compares different CDC architectures. A novel non-linear CDC is also proposed and analysed. Energy-efficiency of the CDC is improved by implementation of various design techniques like double sampling, system-level chopping and a novel inverter-based OTA. The CDC has been designed in such a way that it can operate with either an on-chip or external pressure sensor. The CDC can be tuned to compensate for a wide range of baseline capacitance. The CDC operates over a pressure range of 0-1.3 bar and achieves a pressure resolution of 1e?5 bar (equivalent to a resolution of 16 bits). The CDC is implemented in NXP 0.16?m 1P6M technology. The circuit design and layout of the CDC are presented. The CDC consumes 2.33?A from a 1.2V supply resulting in an energy consumption of only 2.01nJ, a significant improvement over the state-of-the-art.

Microelectronics & Computer Engineering

Electrical Engineering, Mathematics and Computer Science

Advisors/Committee Members: Pertijs, M. (mentor).

Subjects/Keywords: pressure-sensor interface; energy-efficiency; double sampling; inverter-based OTA; incremental ?? ADC

…3-1-2 Evolution of Inverter-Based OTA Structure . . . . . . . . . . . . . . . . 3-2 Design… …double sampling, system-level chopping and a novel inverter-based OTA. The circuit must be… …Based OTA . . . . . . . . . . . . . . . . . . . . . 33 3-1-1 Motivation… …Table of Contents 3 Implementation of the Linear CDC 33 3-1 Design Technique I - Inverter… …44 46 4 Simulation Results 4-1 OTA Simulation Results… 

Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Sample image

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Rajendran, L. (. (2013). Design of an Energy-Efficient Interface Circuit for a MEMS-based Capacitive Pressure Sensor. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:b6b6915b-ac95-45ad-838d-c8fad5b8a171

Chicago Manual of Style (16th Edition):

Rajendran, L (author). “Design of an Energy-Efficient Interface Circuit for a MEMS-based Capacitive Pressure Sensor.” 2013. Masters Thesis, Delft University of Technology. Accessed September 21, 2020. http://resolver.tudelft.nl/uuid:b6b6915b-ac95-45ad-838d-c8fad5b8a171.

MLA Handbook (7th Edition):

Rajendran, L (author). “Design of an Energy-Efficient Interface Circuit for a MEMS-based Capacitive Pressure Sensor.” 2013. Web. 21 Sep 2020.

Vancouver:

Rajendran L(. Design of an Energy-Efficient Interface Circuit for a MEMS-based Capacitive Pressure Sensor. [Internet] [Masters thesis]. Delft University of Technology; 2013. [cited 2020 Sep 21]. Available from: http://resolver.tudelft.nl/uuid:b6b6915b-ac95-45ad-838d-c8fad5b8a171.

Council of Science Editors:

Rajendran L(. Design of an Energy-Efficient Interface Circuit for a MEMS-based Capacitive Pressure Sensor. [Masters Thesis]. Delft University of Technology; 2013. Available from: http://resolver.tudelft.nl/uuid:b6b6915b-ac95-45ad-838d-c8fad5b8a171

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