Browsing by Author "Ismail, A"

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Electronic interface system with 7.5/12.5V actuation for MEMS accelerometer
(IEEE, 2017) Elmala, MA; Omar, A; Metawea, A; Ismail, A; Elmallah, AS; Saeed, AI; Elsayed, A; Bensaleh, MS; Obeid, AM; Alghofaili, A; Alzahem, I; Alshaibani, S; Alnahdi, M; Aljehani, N; Bhybha, A; Qasim, SM
An electronic interface system for MEMS accelerometer is implemented in 0.18μm HVCMOS technology. The ASIC uses 7.5/12.5V to increase the net actuation force and increases the input acceleration range. The measured ASIC sensitivity is 35fF/g. Maximum measured error is 0.38% of full scale, for 0 to 5g input acceleration. This ASIC interface includes on-chip reference generation, decimation, and temperature compensation.
A high performance MEMS based digital-output gyroscope
(IEEE, 2013) Ismail, A; George, B; Elmallah, A; Mokhtar, A; Abdelazim, M.; Elmala, M; Elshennawy, A; Omar, A; Saeed, M; Mostafa, I; Elsayed, A
In this work, the architecture, and measurements results of an ultra-low noise closed-loop force feedback gyroscope, with superior bias instability, are presented. The MEMS is interfaced to a highly programmable capacitive interface ASIC, constructing a complete sensor module with a digital-output. Measurements results indicate the superior performance of the gyroscope, with a bias instability of 1°/hr, a noise floor of 1.3m/s/√Hz, and a full-scale range of ±300°/s, while consuming 25mA from a 5V supply.
A new versatile hardware platform for closed-loop gyro evaluation
(IEEE, 2015) Omar, A.; Elshennawy, A; Ismail, A; Nagib, M.; Elmala, M; Elsayed, A
In this work, a fast and cost-efficient method, to evaluate MEMS gyroscope, in a closed-loop sense-mode operation (force-feedback), is introduced. The solution proposed in this paper introduces a complete platform for developing MEMS-based closed-loop inertial sensor that is highly competitive in terms of performance and that can significantly reduce the development cost and the time-to-market. The platform comprises a high-performance highly-programmable digital capacitive ASIC used to interface to the MEMS sensor, along with hardware for digital processing. The platform is also associated with a software program to configure the ASIC settings according to the MEMS parameters, in order to achieve the desired dynamic range, bandwidth and noise performance. Sensor manufacturers can utilize this tool to quickly asses their sensors in the development phase. Furthermore, the ASIC associated with the platform can be used for rapid prototyping, or building a final sensor product.
A self-clocked ASIC interface for MEMS gyroscope with 1m°/s/√Hz noise floor
(IEEE, 2011) Elsayed, A; Elshennawy, A; Elmallah, A; Shaban, Ahmad; George, B; Elmala, M; Ismail, A; Wassal, A; Sakr, M; Mokhtar, A; Hafez, M; Hamed, A; Saeed, M; Samir, M; Hammad, M; Elkhouly, M; Kamal, A; Rabieah, M; Elghufaili, A; Shaibani, S; Hakami, I; Alanazi, T
An interface for MEMS gyroscope is implemented in 0.18μm HVCMOS technology, and achieves a low noise floor of 1m°/sec/√Hz over 200Hz BW. Electromechanical ΣΔ force-feedback and self-clocking scheme based on gyro resonance are implemented. The interface includes on-chip reference generation, decimation, and temperature compensation.