Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element
Reexamination Certificate
2011-08-16
2011-08-16
Chapman, John E (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
Acceleration determination utilizing inertial element
C324S678000, C702S141000
Reexamination Certificate
active
07997137
ABSTRACT:
There is provided a bidirectional readout circuit for detecting direction and amplitude of an oscillation sensed at a capacitive microelectromechanical system (MEMS) accelerometer, the bidirectional readout circuit converting capacitance changes of the capacitive MEMS accelerometer into a time change amount by using high resolution capacitance-to-time conversion technology and outputting the time change amount as the direction and the amplitude of the oscillation by using time-to-digital conversion (TDC) technology, thereby detecting not only the amplitude of the oscillation but also the direction thereof, which is capable of being applied to various MEMS sensors.
REFERENCES:
patent: 4065715 (1977-12-01), Jaffe et al.
patent: 4642555 (1987-02-01), Swartz et al.
patent: 5495414 (1996-02-01), Spangler et al.
patent: 5646346 (1997-07-01), Okada
patent: 2004/0158439 (2004-08-01), Kim et al.
patent: 10-2004-0050399 (2004-06-01), None
Zeljko Ignjatovic, et al. “An Interface Circuit for Measuring Capacitance Changes Based Upon Capacitance-to-Duty Cycle(CDC)Converter” IEEE Sensors Journal, 2005.
Choi Chang Auck
Hwang Gunn
Je Chang Han
Jung Sung Hae
Lee Myung Lae
Chapman John E
Electronics and Telecommunications Research Institute
LandOfFree
Bidirectional readout circuit for detecting direction and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bidirectional readout circuit for detecting direction and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bidirectional readout circuit for detecting direction and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2769869