scholarly journals Application of the Non-Enzymatic Glucose Sensor Combined with Microfluidic System and Calibration Readout Circuit

Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 351
Author(s):  
Jung-Chuan Chou ◽  
Yu-Hao Huang ◽  
Po-Yu Kuo ◽  
Chih-Hsien Lai ◽  
Yu-Hsun Nien ◽  
...  
Keyword(s):  
Glucose Sensor ◽  
Drift Rate ◽  
Silver Nanowires ◽  
Microfluidic System ◽  
Low Power Consumption ◽  
Instrumentation Amplifier ◽  
Readout Circuit ◽  
Average Sensitivity ◽  
The Stability ◽  
Sensing Characteristics

In this research, we proposed a potentiometric sensor based on copper doped zinc oxide (CZO) films to detect glucose. Silver nanowires were used to improve the sensor’s average sensitivity, and we used the low power consumption instrumentation amplifier (UGFPCIA) designed by our research group to measure the sensing characteristics of the sensor. It was proved that the sensor performs better when using this system. In order to observe the stability of the sensor, we also studied the influence of two kinds of non-ideal effects on the sensor, such as the drift effect and the hysteresis effect. For this reason, we chose to combine the calibration readout circuit with the voltage-time (V-T) measurement system to optimize the measurement environment and successfully reduced the instability of the sensor. The drift rate was reduced by about 51.1%, and the hysteresis rate was reduced by 13% and 28% at different measurement cycles. In addition, the characteristics of the sensor under dynamic conditions were also investigated, and it was found that the sensor has an average sensitivity of 13.71 mV/mM and the linearity of 0.998 at a flow rate of 5.6 μL/min.

Design optimization and stability enhancement of modified inter-digital capacitive humidity transducer with cobalt ferrite nanoparticles as dielectric

2019 ◽  
Vol 42 (4) ◽  
pp. 917-923
Author(s):  
Jiss Paul ◽  
Jacob Philip
Keyword(s):  
Recovery Time ◽  
Room Temperature ◽  
Cobalt Ferrite ◽  
Dynamic Range ◽  
Ferrite Nanoparticles ◽  
Sensitive Layer ◽  
Humidity Transducer ◽  
The Stability ◽  
Stability Enhancement ◽  
Sensing Characteristics

A modified inter-digital capacitive (IDC) transducer for relative humidity (RH) measurement is fabricated by coating a thick film of polyvinyl alcohol (PVA) on the structure. The effective capacitance of the sensor, measured at 1MHz, increases with RH at room temperature. The RH sensing characteristics of PVA coated IDC transducer are analysed in terms of its sensitivity, dynamic range, frequency response, repeatability and recovery time. It is found that the stability of such a PVA based RH transducer improves remarkably by diffusing nanoparticles of CoFe2O4 in the PVA layer. A standard deviation of ± 0.05 and ± 0.01 for a sensitive layer with pure PVA and PVA-CoFe2O4 combination respectively results in a measurement error of ± 0.005 and ± 0.003.

scholarly journals A One-Dimensional Magnetic Chip with a Hybrid Magnetosensor and a Readout Circuit

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Guo-Ming Sung ◽  
Hsin-Kwang Wang ◽  
Leenendra Chowdary Gunnam
Keyword(s):  
Field Effect Transistors ◽  
Oxide Semiconductor ◽  
Instrumentation Amplifier ◽  
Maximum Output ◽  
Hall Voltage ◽  
Readout Circuit ◽  
Pass Filter ◽  
Low Pass Filter ◽  
One Dimensional ◽  
Macro Model

This work presents a one-dimensional magnetic chip composed of a hybrid magnetosensor and a readout circuit, which were fabricated with 0.18 μm 1P6M CMOS technology. The proposed magnetosensor includes a polysilicon cross-shaped Hall plate and two separated metal-oxide semiconductor field-effect transistors (MOSFETs) to sense the magnetic induction perpendicular to the chip surface. The readout circuit, which comprises a current-to-voltage converter, a low-pass filter, and an instrumentation amplifier, is designed to amplify the output Hall voltage with a gain of 43 dB. Furthermore, a SPICE macro model is proposed to predict the sensor’s performance in advance and to ensure sufficient comprehension of the magnetic mechanism of the proposed magnetosensor. Both simulated and measured results verify the correctness and flexibility of the proposed SPICE macro model. Measurements reveal that the maximum output Hall voltage VH, the optimum current-related magnetosensitivity SRI, the optimum voltage-related magnetosensitivity SRV, the averaged nonlinearity error NLE, and the relative bias current Ibias are 4.381 mV, 520.5 V/A·T, 40.04 V/V·T, 7.19%, and 200 μA, respectively, for the proposed 1-D magnetic chip with a readout circuit of 43 dB. The averaged NLE is small at high magnetic inductions of ±30 mT, whereas it is large at low magnetic inductions of ±30 G.

Bluetooth Hands Free System for Fixed Telephone Research

2012 ◽  
Vol 198-199 ◽  
pp. 1603-1608
Author(s):  
Qing Hua Shang ◽  
Ping Liu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Mobile Phones ◽  
Daily Life ◽  
Low Cost ◽  
Low Power Consumption ◽  
Wireless Technology ◽  
Free System ◽  
Wireless Technologies ◽  
The Stability

Wireless technology has walked into the People's Daily life, Bluetooth technology comes to the fore in so many wireless technologies with its low power consumption, low cost and other characteristics. Bluetooth technology is used widely, we can see it in mobile phones or in our cars, it seems that Bluetooth technology has penetrated into every aspect of our lives. Even so, the combination of Bluetooth technology and fixed telephone still has a very big development space. If the stability of the fixed telephone combined with the flexible of Bluetooth technology, it will give the life of people a lot of convenience. This paper will introduces the Bluetooth hands free system for fixed telephone, it is such a product that it will make Bluetooth technology and common fixed phone combined, and make it a reality that people can use common Bluetooth headset to answer or call a fixed telephone.

Design and Implementation of High-Precision Mine-Used Water-Pressure Sensor

2014 ◽  
Vol 513-517 ◽  
pp. 3513-3517
Author(s):  
Rui Xue Wang ◽  
Na Zhang ◽  
Le Nian Xu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
High Precision ◽  
Pressure Sensor ◽  
Water Pressure ◽  
Low Power Consumption ◽  
Stability Measurement ◽  
Working Principle ◽  
The Stability ◽  
Upper Computer

A novel mine-used water-pressure sensor is presented in this paper, the configuration, working principle and design of main circuits are introduced in detail. Using pressure sensor, high precision 24 bits A/D converter AD7714 and low power consumption MCU P89LPC932 to complete the water-pressure measurement, and transferred the measuring results to upper computer through M-BUS, realized the stability measurement of high precision and low power consumption.

scholarly journals CMOS Operational Floating Current Conveyor Circuit for Instrumentation Amplifier Application

2020 ◽  
pp. 317-323
Author(s):  
Fahmi Elsayed ◽  
◽  
Mostafa Rashdan ◽  
Mohammad Salman
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Current Conveyor ◽  
Total Power ◽  
Low Power Consumption ◽  
Instrumentation Amplifier ◽  
Fully Integrated ◽  
Total Power Consumption ◽  
High Bandwidth ◽  
Operational Floating Current Conveyor

This paper presents a fully integrated CMOS Operational Floating Current Conveyor (OFCC) circuit. The proposed circuit is designed for instrumentation amplifier circuits. The CMOS OFCC circuit is designed and simulated using Cadence in TSMC 90 m technology kit. The circuit aims at two different design goals. The first goal is to design a low power consumption circuit (LBW design) while the second is to design a high bandwidth circuit (HBW design). The total power consumption of the LBW design is 1.26 mW with 30 MHz bandwidth while the power consumption of the HBW design is 3 mW with 104.6 MHz bandwidth.

Research on the stability of CTIA readout circuit for IR Detector (Conference Presentation)

2018 ◽  
Author(s):  
Zhiwei Huang ◽  
Xing Xu ◽  
Wuying Li ◽  
Yanping Zhong ◽  
Honghui Yuan ◽  
...  
Keyword(s):  
Readout Circuit ◽  
Ir Detector ◽  
The Stability

Research on the stability of readout circuit based on single grade OP-AMP for IR detector

2019 ◽  
Author(s):  
Honghui Yuan ◽  
YongPing Chen ◽  
Zhiwei Huang ◽  
Xing Xu ◽  
Wuying Li ◽  
...  
Keyword(s):  
Readout Circuit ◽  
Ir Detector ◽  
Op Amp ◽  
The Stability

scholarly journals Constraining the Evolution of ZZ Ceti

2003 ◽  
Vol 12 (1) ◽  
Author(s):  
A. S. Mukadam ◽  
S. O. Kepler ◽  
D. E. Winget ◽  
R. E. Nather ◽  
M. Kilic ◽  
...  
Keyword(s):  
Cooling Rate ◽  
White Dwarf ◽  
Drift Rate ◽  
Hydrogen Atmosphere ◽  
Evolutionary Models ◽  
The Stability

AbstractWe report our analysis of the stability of pulsation periods in the DAV star (pulsating hydrogen atmosphere white dwarf) ZZ Ceti, also called R548. Based on observations that span 31 years, we conclude that the period 213.132605 s observed in ZZ Ceti drifts at a rate dP/dt≤(5.5±1.9)×10Constraining the cooling rate of ZZ Ceti aids theoretical evolutionary models and white dwarf cosmochronology. The drift rate of this clock is small enough that reflex motion caused by any orbital planets is detectable within limits; our Ṗ constraint places limits on the mass and/or distance of any orbital companions.

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