Simulation of linear dynamic macro model of photo catalytic sensor in SPICE

Whig, Pawan; Ahmad, Syed Naseem

doi:10.1108/compel-09-2012-0160

Cited by 21 publications

(14 citation statements)

References 17 publications

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“…To overcome these limitations and make the application faster a Simulation Program with Integrated Circuit Emphasis (SPICE) model for PCS was developed. 8 With the advancements in semiconductor technology and the use of SPICE model one can minimize the size of the overall system, increase the reliability and make it more user friendly.…”

Section: Pcs Macro Modelmentioning

confidence: 99%

Development of Economical Asic for PCS for Water Quality Monitoring

Whig

Ahmad

2014

J CIRCUIT SYST COMP

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In this paper, the design of an ASIC is presented that implement a low-cost system for the supervision of water quality in urban areas or rivers. Photo catalytic sensor (PCS) estimates the parameter biological oxygen demand (BOD) which is generally used to estimate quality of water. The system proposed in this paper involves a simple potentiometric approach that provides a correlation in the input-output signals of low-cost sensors. This approach which is more users friendly and fast in operation is obtained by modeling and optimization of sensor for water quality monitoring. This is to overcome several drawbacks generally found in the previous°o w injection analysis method of determining chemical oxygen demand (COD)-like complex designing, nonlinearity and long computation time. The system constitutes a signi¯cant cost reduction in the supervision of water quality monitoring. The main reason of employing a readout circuit to PCS circuitry, is the fact that the°uctuation of O 2 in°uences the threshold voltage, which is internal parameter of the FET and can manifest itself as a voltage signal at output but as a function of the trans-conductance gain. The trans-conductance is a passive parameter and in order to derive voltage or current signal from its°uctuations the sensor has to be attached to readout circuit. This circuit provides high sensitivity to the changes in percentage of O 2 in the solution. In this design simple potentiometric approach with few passive components are used to build a readout circuit. The paper focuses on the electronic implementation of the readout system for the PCS which optimize the circuit performance and increases reliability.

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Section: Pcs Macro Modelmentioning

confidence: 99%

Development of Economical Asic for PCS for Water Quality Monitoring

Whig

Ahmad

2014

J CIRCUIT SYST COMP

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“…To address this problem, a SPICE model for PCS is introduced by Whig and Ahmad, which is more user friendly and has less response time [3]. The circuit previously designed is not suitable for the multiple input PCS one of the major reason is that there are as many input reference electrodes are needed as the number of input sensors are increased, in other words the circuit is not suitable for the multiple input sensors network [4]. To deal with such a problem a new circuit is implemented with the facility of multiple inputs using only the single reference electrode and few active components.…”

Section: Introductionmentioning

confidence: 99%

Simulation and performance analysis of Multiple PCS sensors system

Whig¹,

Ahmad²,

Kumar³

2017

ELS

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In this paper, a novel circuit is presented which overcome a serious limitation found in case of multiple sensors system. In this novel system design only one reference electrode and few active components used that makes the implementation of a low-cost system for the supervision of water quality. Photo Catalytic Sensor (PCS) estimates the parameter BOD (Biological Oxygen Demand) which is generally used to estimate quality of water. The system proposed in this paper involves a balanced bridge approach using few electronic components that provides a correlation in the input-output signals of low-cost sensors. The main reason of employing a readout circuit to PCS circuitry, is the fact that the fluctuation of O2 influences the threshold voltage, which is internal parameter of the FET and can manifest itself as a voltage signal at output but as a function of the trans conductance gain. The trans-conductance is a passive parameter and in order to derive voltage or current signal from its fluctuations the sensor has to be attached to readout circuit. This circuit provides high sensitivity to the changes in percentage of O2 in the solution.

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“…In the submicron level the thickness of gate oxide is very minor in dimension. As the aspect of gate oxide decreases this result in tunnelling of charge carriers which significantly increases the leakage current of MOSFETS and results in the decrease of device reliability [3,4]. One way to remain tumbling dimensions is possible by using materials having much sophisticated permittivity than silicon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Controlling the Output Error for Photo Catalytic Sensor (PCS) Using Fuzzy Logic

Whig¹,

Sn²

2017

J Earth Sci Clim Change

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This paper presents novel method to control output error of the Photo Catalytic Sensor (PCS) using fuzzy interface. Whig and Ahmad in 2014, proposed the spice model of PCS which is a type of ion sensitive FET and very useful to estimate the parameter BOD (Biological Oxygen Demand) which is generally used to estimate quality of water. PCS can also be used to calculate the amount of concentration level of oxygen required to purify the polluted air and sanitization of surface. The purpose to control the output error due to variation in temperature is due to the fact that the fluctuation of O 2 influence the threshold voltage, which is internal parameter of FET can manifest itself as a voltage signal at output but as a function of trans conductance gain. Hence, a system controlled by fuzzy logic which control the output error is proposed. This novel method is very useful because of their simplicity, robustness and successful practical applications. The proposed system is fast in operation which is further helpful for PCS which operates under sub-threshold conditions and reduced computation time. The system is user friendly and the outcomes of simulation are fairly in agreement with the theoretical estimation.

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Simulation of linear dynamic macro model of photo catalytic sensor in SPICE

Cited by 21 publications

References 17 publications

Development of Economical Asic for PCS for Water Quality Monitoring

Development of Economical Asic for PCS for Water Quality Monitoring

Simulation and performance analysis of Multiple PCS sensors system

Controlling the Output Error for Photo Catalytic Sensor (PCS) Using Fuzzy Logic

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