The Experts below are selected from a list of 25923 Experts worldwide ranked by ideXlab platform
Chris Van Hoof - One of the best experts on this subject based on the ideXlab platform.
-
Ultra Low Power Capacitive Sensor Interfaces
2007Co-Authors: Wouter Bracke, Robert Puers, Chris Van HoofAbstract:An increasing number of medical diagnostics, comfort, entertainment, and sports applications are making use of capacitive sensor systems in and around the body. These sensor systems should work as small distributed units that can collect data over a long period of time. So, ultra low power electronics are a major challenge in these applications. Ultra Low Power Capacitive Sensor Interfaces describes the design and theory of ultra low power capacitive sensor Interfaces. The books major asset is the realization of a very low power generic sensor Interface Chip, that is adaptable to a broad range of capacitive sensors. The book starts with an overview on the most important design aspects for autonomous sensor systems. The different building blocks are discussed and the modular architecture for the generic sensor Interface Chip is presented. Furthermore, the design of the analog components, such as capacitance-to-voltage converters, switched capacitor amplifier, Sigma Delta modulator, oscillators and reference circuits, is described in more detail. Finally, the generic sensor Interface Chip is applied in several state-of-the-art pressure sensor and accelerometer applications. Ultra Low Power Capacitive Sensor Interfaces is essential reading for anybody with an academic or professional interest in semiconductor design.
-
ultra low power Interface Chip for autonomous capacitive sensor systems
IEEE Transactions on Circuits and Systems I-regular Papers, 2007Co-Authors: Wouter Bracke, Robert Puers, Patrick Merken, Chris Van HoofAbstract:Traditionally, most of the sensor Interfaces must be tailored towards a specific application. This approach results in a high recurrent design cost and time to market. On the other hand, generic sensor Interface design reduces the costs and offers a handy solution for multisensor applications. This paper presents a generic sensor Interface Chip (GSIC), which can read out a broad range of capacitive sensors. It contains capacitance-to-voltage converters, a switched-capacitor amplifier, an analog-to-digital converter, oscillators, clock generation circuits and a reference circuit. The system combines a very low-power design with a smart energy management, which adapts the current consumption according to the accuracy and speed requirements of the application. The GSIC is used in a pressure and an acceleration monitoring system. The pressure monitoring system achieves a current drain of 2.3 muA for a 10-Hz sample frequency and an 8-bit accuracy. In the acceleration monitoring system, we measured a current of 3.3 muA for a sample frequency of 10 Hz and an accuracy of 9 bits
Wouter Bracke - One of the best experts on this subject based on the ideXlab platform.
-
Ultra Low Power Capacitive Sensor Interfaces
2007Co-Authors: Wouter Bracke, Robert Puers, Chris Van HoofAbstract:An increasing number of medical diagnostics, comfort, entertainment, and sports applications are making use of capacitive sensor systems in and around the body. These sensor systems should work as small distributed units that can collect data over a long period of time. So, ultra low power electronics are a major challenge in these applications. Ultra Low Power Capacitive Sensor Interfaces describes the design and theory of ultra low power capacitive sensor Interfaces. The books major asset is the realization of a very low power generic sensor Interface Chip, that is adaptable to a broad range of capacitive sensors. The book starts with an overview on the most important design aspects for autonomous sensor systems. The different building blocks are discussed and the modular architecture for the generic sensor Interface Chip is presented. Furthermore, the design of the analog components, such as capacitance-to-voltage converters, switched capacitor amplifier, Sigma Delta modulator, oscillators and reference circuits, is described in more detail. Finally, the generic sensor Interface Chip is applied in several state-of-the-art pressure sensor and accelerometer applications. Ultra Low Power Capacitive Sensor Interfaces is essential reading for anybody with an academic or professional interest in semiconductor design.
-
ultra low power Interface Chip for autonomous capacitive sensor systems
IEEE Transactions on Circuits and Systems I-regular Papers, 2007Co-Authors: Wouter Bracke, Robert Puers, Patrick Merken, Chris Van HoofAbstract:Traditionally, most of the sensor Interfaces must be tailored towards a specific application. This approach results in a high recurrent design cost and time to market. On the other hand, generic sensor Interface design reduces the costs and offers a handy solution for multisensor applications. This paper presents a generic sensor Interface Chip (GSIC), which can read out a broad range of capacitive sensors. It contains capacitance-to-voltage converters, a switched-capacitor amplifier, an analog-to-digital converter, oscillators, clock generation circuits and a reference circuit. The system combines a very low-power design with a smart energy management, which adapts the current consumption according to the accuracy and speed requirements of the application. The GSIC is used in a pressure and an acceleration monitoring system. The pressure monitoring system achieves a current drain of 2.3 muA for a 10-Hz sample frequency and an 8-bit accuracy. In the acceleration monitoring system, we measured a current of 3.3 muA for a sample frequency of 10 Hz and an accuracy of 9 bits
Andrew J Mason - One of the best experts on this subject based on the ideXlab platform.
-
a generic Interface Chip for capacitive sensors in low power multi parameter microsystems
Sensors and Actuators A-physical, 2000Co-Authors: N Yazdi, Andrew J Mason, K Najafi, K D WiseAbstract:Abstract This paper presents a generic low-power sensor Interface Chip compatible with smart microsystems and a wide range of capacitive transducers. The Interface Chip is highly programmable, can communicate with an external microcontroller using a nine-line sensor bus standard, contains a switched-capacitor readout circuit, supports sensor self-test, and includes a temperature sensor. The circuit can Interface with up to six external sensors and contains three internal programmable reference capacitors in the range of 0.15–8 pF. The Chip measures 3.2×3.2 mm in a standard 3-μm single-metal double-poly p-well process, dissipates less than 2.2 mW from a single 5 V supply, and can resolve input capacitance variations of less than 1 fF in 10 Hz bandwidth.
-
A Universal Micro-Sensor Interface Chip with network communication bus and highly programmable sensor readout
The 2002 45th Midwest Symposium on Circuits and Systems 2002. MWSCAS-2002., 1Co-Authors: Jichun Zhang, Kun Zhang, Zhigang Wang, Andrew J MasonAbstract:This paper presents a Universal Micro-Sensor Interface (UMSI) circuit designed for low-power microsystems that support multiple sensors and actuators. The Interface Chip contains all necessary reference, readout, control, and communication circuitry to Interface a range of capacitive, resistive, voltage, or digital output devices to system control hardware. For online configuration of many parameters including readout gain and offset, this versatile Chip is highly programmable through a sensor bus. The Chip also incorporates a temperature sensor for compensation, an SPI Interface, general purpose digital I/O, and an interrupt control unit for switch-type sensors. Fabricated in a foundry 3M 2P 0.5/spl mu/m CMOS process, the die occupies 2.22mm /spl times/ 2.22mm and draws 6.7 /spl mu/A to 4 mA, (depending on configuration) from a 3V supply. Preliminary test results show the Chip to be functional within design specifications.
Koji Otsuka - One of the best experts on this subject based on the ideXlab platform.
-
Toward million-fold sensitivity enhancement by sweeping in capillary electrophoresis combined with thermal lens microscopic detection using an Interface Chip
Journal of Chromatography A, 2005Co-Authors: Fumihiko Kitagawa, Kenji Uchiyama, Akihiko Hattori, Takashi Tsuneka, Yoshihiro Akimoto, Kenji Sueyoshi, Koji OtsukaAbstract:Abstract This paper reports a thermal lens microscope (TLM) detection coupled with capillary electrophoresis (CE) by using an Interface Chip (IFChip) to achieve highly sensitive detection with high reproducibility. Fused silica capillaries with an inner diameter of 50 μm were directly connected to a microchannel on the IFChip. In comparison with an on-capillary detection method in CE-TLM, ca. 10-fold improvements in the reproducibility for peak height were obtained by using IFChips. The detection limit of an azo dye was estimated to be 3.6 × 10 −7 M (100 ppb), which was above 100-times lower than that of conventional absorbance detection. Toward further improvement of the detectability for nonfluorescent compounds, on-line sample preconcentration by sweeping was applied to the CE-TLM using the IFChip. Due to the sweeping effect, 3 900 000-fold increase in the sensitivity was successfully achieved.
K D Wise - One of the best experts on this subject based on the ideXlab platform.
-
a generic Interface Chip for capacitive sensors in low power multi parameter microsystems
Sensors and Actuators A-physical, 2000Co-Authors: N Yazdi, Andrew J Mason, K Najafi, K D WiseAbstract:Abstract This paper presents a generic low-power sensor Interface Chip compatible with smart microsystems and a wide range of capacitive transducers. The Interface Chip is highly programmable, can communicate with an external microcontroller using a nine-line sensor bus standard, contains a switched-capacitor readout circuit, supports sensor self-test, and includes a temperature sensor. The circuit can Interface with up to six external sensors and contains three internal programmable reference capacitors in the range of 0.15–8 pF. The Chip measures 3.2×3.2 mm in a standard 3-μm single-metal double-poly p-well process, dissipates less than 2.2 mW from a single 5 V supply, and can resolve input capacitance variations of less than 1 fF in 10 Hz bandwidth.