Results 261 to 270 of about 5,103 (279)

Bacteria Growth Monitoring Through a Differential CMOS Capacitive Sensor

IEEE Transactions on Biomedical Circuits and Systems, 2010
In this paper, we present a bacteria growth monitoring technique using a complementary metal-oxide semiconductor capacitive sensor. The proposed platform features a differential capacitive readout architecture with two interdigitized reference and sensing electrodes. These electrodes are exposed to pure Luria-Bertani (LB) medium and Escherichia Coli (E.
Ebrahim Ghafar-Zadeh, Mohamad Sawan, Vamsy P. Chodavarapu, Tahereh Hosseini-Nia   +3 more
openaire   +2 more sources

Modeling of MEMS capacitive differential pressure sensor

2013 International Conference on Circuits, Power and Computing Technologies (ICCPCT), 2013
In this paper, modeling of high sensitive capacitive differential pressure sensor (CDPS) structure was proposed. The-working principle of CDPS was explained. Different types of CDPS structure for aircraft altimeter were designed. Polymide square diaphragm membrane is used to sense the pressure.
Parthasarathy Eswaran, S. Malarvizhi
openaire   +1 more source

A switched-capacitor differential-capacitance-to-time converter for capacitive sensors

2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS), 2011
A high-accuracy and low-power consumption switched-capacitor (SC) differential-capacitance-to-time converter (DCTC) is presented for high-accuracy ratiometric operation of capacitive sensors. This circuit does not require additional capacitors and component matching.
openaire   +1 more source

Direct Interface Circuit for Differential Capacitive Sensors

2008 IEEE Instrumentation and Measurement Technology Conference, 2008
This paper proposes and analyses a novel interface circuit for differential capacitive sensors with linear or hyperbolic relationship. In such a new circuit, the sensor is directly connected to a microcontroller without using any analog integrated circuit in the signal path.
Ferran Reverter, Oscar Casas
openaire   +1 more source

CMOS Capacitance-to-Time Converter-Based Interface for Differential Capacitive Sensors

2020 Global Congress on Electrical Engineering (GC-ElecEng), 2020
This paper presents pre-layout simulation results on a CMOS implementation of a capacitance-to-time converter-based electronic interface for differential capacitive sensors. Its simple architecture, comprising only three operational amplifiers (OA) and a digital mixer (inverted XOR gate) allows, by properly setting the values of seven biasing resistors,
Hala Darwish, Candid Reig, M. Dolores Cubells-Beltran, Gildas Leger, Andrea De Marcellis   +4 more
openaire   +1 more source

A micromachined strain sensor with differential capacitive readout

Technical Digest. IEEE International MEMS 99 Conference. Twelfth IEEE International Conference on Micro Electro Mechanical Systems (Cat. No.99CH36291), 1999
This paper describes a laterally deflecting micromachined device that can be used to electronically monitor residual strain and Young's modulus of microstructural materials. Residual strain is indicated by a change in the differential capacitance change, whereas the Young's modulus is provided by the slope of a simple CV (capacitance vs. voltage) test.
L. Que, M.-H. Li, L.L. Chu, Y.B. Gianchandani   +3 more
openaire   +1 more source

Capacitive differential pressure sensor for harsh environments

Sensors and Actuators A: Physical, 2000
Abstract A capacitive differential pressure sensor for the pressure range of 0–1 bar has been developed. The primary field of application is hydrodynamic flow measurements in hot petroleum wells. In these harsh environments the sensor has to survive high common mode pressure in the range of 1000 bar and temperatures up to 180°C.
S.T Moe, K Schjølberg-Henriksen, D.T Wang, E Lund, J Nysæther, L Furuberg, M Visser, T Fallet, R.W Bernstein   +8 more
openaire   +1 more source

A differential capacitive thin film hydrogen sensor

Sensors and Actuators B: Chemical, 2009
Abstract A compact, differential, hydrogen-specific sensor based on the lattice expansion of LaAl0.3Ni4.7 metal hydride thin films has been fabricated and characterized. Characterization of LaAl0.3Ni4.7 films performed using a capacitance dilatometer revealed that the lattice expansion was proportional to the partial pressure of H2 over the range 0 ...
D.J. Kirby, D.T. Chang, F.P. Stratton, J.J. Zinck   +3 more
openaire   +1 more source

Study on MEMS Capacitive Differential Pressure Sensor

Key Engineering Materials, 2014
The design and fabrication of MEMS capacitive differential pressure sensor is reported. Silicon membrane is used as movable electrode. Gold metal film on glass is used as fixed electrode. Anodic bonding is used to bond together the silicon and glass to form the capacitive pressure sensor.
Zhi Hao Hou, Zhen Huang, Shi Xing Jia
openaire   +1 more source

Differential Ring Oscillator Based Capacitance Sensor for Microfluidic Applications

IEEE Transactions on Biomedical Circuits and Systems, 2017
A simple high frequency capacitance sensor with 180 aF sensitivity is designed for a wide range of microfluidic applications. The sensor is implemented utilizing differential ring oscillators operating at [Formula: see text] MHz with a differential signal at [Formula: see text] MHz. The sensor occupies [Formula: see text] cm × 2 cm on a printed circuit
Kaveh Mohammad, Douglas J. Thomson
openaire   +2 more sources