Thesis
Programmable low-power mixed signal integrated circuit
Washington State University
Master of Science (MS), Washington State University
2014
Handle:
https://hdl.handle.net/2376/107031
Abstract
The design and architecture of a small programmable low-power analog integrated circuit (IC) with a die size of about 1mm2 is presented for implantable applications. Example applications are implantable devices for capturing neural signals in small animals and for tracking juvenile salmon on the Columbia River. Many of the functions required in these applications can be provided by digital logic but low-power analog circuits to interface to sensors and/or actuators are often required. The limited choice of available small-size analog components typically requires the design of custom ICs, which considerably increase development time and cost. This work describes the design of the low-power operational amplifiers (op-amps) that can be configured to form a multitude of analog functions. The design of the op-amps with programmable compensation, bandwidth and offset voltage will be presented along with a novel feedback network with variable resistors and capacitors. A low noise op-amp design is also provided for a noise-sensitive input signal. A technique that enhances the effective resistance and allows the filters to achieve cutoff frequencies below 100Hz using only on-chip components is presented. The architecture of a programmable mixed-signal IC will be introduced that includes three low-power op-amps along with one low-noise op-amps. The IC includes a 12-bit digital-toanalog converter, a comparator, a 12-bit analog-to-digital converter and high-voltage input/outputs, and serial interfaces for programming and for outputting data. With all components enabled, the total power dissipation ranges from 1.5mW at ±1.25V supplies to 3mW at ±2.5V supplies. This IC is a step towards reducing the development time and cost for implantable electronics.
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Details
- Title
- Programmable low-power mixed signal integrated circuit
- Creators
- Damayanti Deb
- Contributors
- George S. La Rue (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Electrical Engineering and Computer Science, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525102701842
- Language
- English
- Resource Type
- Thesis