Patents by Inventor Sanchitha Nirodha Fernando
Sanchitha Nirodha Fernando has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20190033075Abstract: According to various embodiments, there is provided a gyroscope device including: an outer frame; and four cells arranged within the outer frame, each cell of the four cells including: a proof mass arranged at least substantially in a centre region of the cell; and four electrode frames, each electrode frame of the four electrode frames arranged at a corner region of the cell and coupled to a respective side of the proof mass.Type: ApplicationFiled: January 24, 2017Publication date: January 31, 2019Inventors: Guoqiang Wu, Sanchitha Nirodha Fernando, Alex Yuandong Gu, Geng Li Chua
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Patent number: 9945968Abstract: A microelectromechanical system (MEMS) accelerometer having separate sense and force-feedback electrodes is disclosed. The use of separate electrodes may in some embodiments increase the dynamic range of such devices. Other possible advantages include, for example, better sensitivity, better noise suppression, and better signal-to-noise ratio. In one embodiment, the accelerometer includes three silicon wafers, fabricated with sensing electrodes forming capacitors in a fully differential capacitive architecture, and with separate force feedback electrodes forming capacitors for force feedback. These electrodes may be isolated on a layer of silicon dioxide. In some embodiments, the accelerometer also includes silicon dioxide layers, piezoelectric structures, getter layers, bonding pads, bonding spacers, and force feedback electrodes, which may apply a restoring force to the proof mass region. MEMS accelerometers with force-feedback electrodes may be used in geophysical surveys, e.g.Type: GrantFiled: June 3, 2014Date of Patent: April 17, 2018Assignees: PGS Geophysical AS, Agency for Science Technology and Research (A*STAR)Inventors: Ilker Ender Ocak, Chengliang Sun, Julius Ming-Lin Tsai, Sanchitha Nirodha Fernando
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Patent number: 9506946Abstract: A fully differential microelectromechanical system (MEMS) accelerometer configured to measure Z-axis acceleration is disclosed. This may avoid some of the disadvantages in traditional capacitive sensing architectures—for example, less sensitivity, low noise suppression, and low SNR, due to Brownian noise. In one embodiment, the accelerometer comprises three silicon wafers, fabricated with electrodes forming capacitors in a fully differential capacitive architecture. These electrodes may be isolated on a layer of silicon dioxide. In some embodiments, the accelerometer also includes silicon dioxide layers, piezoelectric structures, getter layers, bonding pads, bonding spacers, and force feedback electrodes, which may apply a force to the proof mass region. Fully differential MEMS accelerometers may be used in geophysical surveys, e.g., for seismic sensing or acoustic positioning.Type: GrantFiled: June 3, 2014Date of Patent: November 29, 2016Assignees: PGS Geophysical AS, Agency for Science Technology and Research (A*STAR)Inventors: Ilker Ender Ocak, Chengliang Sun, Julius Ming-Lin Tsai, Sanchitha Nirodha Fernando
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Publication number: 20160202366Abstract: A microelectromechanical system (MEMS) accelerometer having separate sense and force-feedback electrodes is disclosed. The use of separate electrodes may in some embodiments increase the dynamic range of such devices. Other possible advantages include, for example, better sensitivity, better noise suppression, and better signal-to-noise ratio. In one embodiment, the accelerometer includes three silicon wafers, fabricated with sensing electrodes forming capacitors in a fully differential capacitive architecture, and with separate force feedback electrodes forming capacitors for force feedback. These electrodes may be isolated on a layer of silicon dioxide. In some embodiments, the accelerometer also includes silicon dioxide layers, piezoelectric structures, getter layers, bonding pads, bonding spacers, and force feedback electrodes, which may apply a restoring force to the proof mass region. MEMS accelerometers with force-feedback electrodes may be used in geophysical surveys, e.g.Type: ApplicationFiled: June 3, 2014Publication date: July 14, 2016Applicants: PGS Geophysical AS, Agency for Science Technology and Research (A*STAR)Inventors: Ilker Ender Ocak, Chengliang Sun, Julius Ming-Lin Tsai, Sanchitha Nirodha Fernando
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Publication number: 20150293142Abstract: A fully differential microelectromechanical system (MEMS) accelerometer configured to measure Z-axis acceleration is disclosed. This may avoid some of the disadvantages in traditional capacitive sensing architectures—for example, less sensitivity, low noise suppression, and low SNR, due to Brownian noise. In one embodiment, the accelerometer comprises three silicon wafers, fabricated with electrodes forming capacitors in a fully differential capacitive architecture. These electrodes may be isolated on a layer of silicon dioxide. In some embodiments, the accelerometer also includes silicon dioxide layers, piezoelectric structures, getter layers, bonding pads, bonding spacers, and force feedback electrodes, which may apply a force to the proof mass region. Fully differential MEMS accelerometers may be used in geophysical surveys, e.g., for seismic sensing or acoustic positioning.Type: ApplicationFiled: June 3, 2014Publication date: October 15, 2015Applicants: PGS Geophysical AS, Agency for Science Technology and Research (A*STAR)Inventors: Ilker Ender Ocak, Chengliang Sun, Julius Ming-Lin Tsai, Sanchitha Nirodha Fernando
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Publication number: 20140260618Abstract: A microelectromechanical system (MEMS) accelerometer having separate sense and force-feedback electrodes is disclosed. The use of separate electrodes may in some embodiments increase the dynamic range of such devices. Other possible advantages include, for example, better sensitivity, better noise suppression, and better signal-to-noise ratio. In one embodiment, the accelerometer includes three silicon wafers, fabricated with sensing electrodes forming capacitors in a fully differential capacitive architecture, and with separate force feedback electrodes forming capacitors for force feedback. These electrodes may be isolated on a layer of silicon dioxide. In some embodiments, the accelerometer also includes silicon dioxide layers, piezoelectric structures, getter layers, bonding pads, bonding spacers, and force feedback electrodes, which may apply a restoring force to the proof mass region. MEMS accelerometers with force-feedback electrodes may be used in geophysical surveys, e.g.Type: ApplicationFiled: February 26, 2014Publication date: September 18, 2014Applicants: Agency for Science Technology and Research (A*STAR), PGS Geophysical ASInventors: Ilker Ender Ocak, Chengliang Sun, Julius Ming-Lin Tsai, Sanchitha Nirodha Fernando
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Publication number: 20140260617Abstract: A fully differential microelectromechanical system (MEMS) accelerometer configured to measure Z-axis acceleration is disclosed. This may avoid some of the disadvantages in traditional capacitive sensing architectures—for example, less sensitivity, low noise suppression, and low SNR, due to Brownian noise. In one embodiment, the accelerometer comprises three silicon wafers, fabricated with electrodes forming capacitors in a fully differential capacitive architecture. These electrodes may be isolated on a layer of silicon dioxide. In some embodiments, the accelerometer also includes silicon dioxide layers, piezoelectric structures, getter layers, bonding pads, bonding spacers, and force feedback electrodes, which may apply a force to the proof mass region. Fully differential MEMS accelerometers may be used in geophysical surveys, e.g., for seismic sensing or acoustic positioning.Type: ApplicationFiled: February 26, 2014Publication date: September 18, 2014Applicants: Agency for Science Technology and Research (A*STAR), PGS Geophysical ASInventors: Ilker Ender Ocak, Chengliang Sun, Julius Ming-Lin Tsai, Sanchitha Nirodha Fernando