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Full-Text Articles in Signal Processing
Design Of Stable Narrow Band-Pass Filter Using Multi-Stage Biquad Topology, Raman Attri
Design Of Stable Narrow Band-Pass Filter Using Multi-Stage Biquad Topology, Raman Attri
Raman K. Attri
Band pass filtering techniques have been a challenging task due to requirement of keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The Biquad family of topologies are typically used for a stabilized filtering application, however the design requirements on Biquad topology for low frequency application is still a challenge. The requirements become more stringent for bandwidth curve, roll-off curve and preciseness of frequency filtering as we move down to low …
Practical Design Evaluation Of Extremely Narrow Band-Pass Filter Topologies, Raman K. Attri
Practical Design Evaluation Of Extremely Narrow Band-Pass Filter Topologies, Raman K. Attri
Raman K. Attri
Narrow Band pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The requirements turns more stringent when working with low frequency Narrow band-pass filters where the shift in few Hz would cause great frequency errors. The selection of right topology for best performance is the key top successful design. This paper objectively …
Evaluation Of Single Op-Amp Topologies For Extremely Narrow Band-Pass Filter Design, Raman Attri
Evaluation Of Single Op-Amp Topologies For Extremely Narrow Band-Pass Filter Design, Raman Attri
Raman K. Attri
Narrow Band pass filtering techniques have been a challenging task since the inception of audio and telecommunication applications. The challenge involves keeping Quality factor, gain and mid-frequency of the filter independent of each other. Other most important aspect is keeping the filter stable, keeping mid-frequency immune to circuit component tolerances and to achieve the mid-frequency at the accurate value. The requirements turns more stringent when working with low frequency Narrow band-pass filters where even the shift in few Hz would cause great frequency errors. The selection of right topology for best performance is the key to successful design. This paper …
Design Approach To Use Platinum Rtd Sensor In Snow Temperature Measurements, Raman Attri
Design Approach To Use Platinum Rtd Sensor In Snow Temperature Measurements, Raman Attri
Raman K. Attri
The snow temperature measurement is a very critical area of hydrological instrumentation. The measured data is used to assess the run-off water, snow pack strength and snow avalanche. The hydrological and snow avalanche forecast models require that temperature be measured at different points in the snow pack, above the snow pack and below the snow pack. A state-of-the-art multi-point snow temperature measurement system has been designed and developed for this purpose. The type of the temperature sensor used is a critical aspect of this physical parameter instrumentation. After lot of study of various aspects of different temperature sensing elements, the …
Design Of An Instrumentation System To Record Distribution Profile Of Snow Layer Temperature For Modelling Of Snow Avalanche Forecast, Raman Attri
Raman K. Attri
The measurement of snow hydrological parameters is extremely important in developing a model for the predication of Snow avalanche as well as Snowmelt water in the rivers. When direct measurement of these parameters is practically difficult, its dependence on snow temperature is used to develop snow cover models. A robust model for avalanche forecasting requires a sophisticated instrumentation system which can measure the required temperature parameters at right data points within snow pack. A Snow Temperature Profile Sensing System along with Surface temperature Sensor has been designed to measure Snow temperature gradient, temperature distributions, and average temperature of snow pack, …
Implementation Of Linear Array Of Ultrasonic Transmitter-Receiver Transducers For Detection Of Non-Smooth Porous Surface, Raman K. Attri, Swaranjit Singh
Implementation Of Linear Array Of Ultrasonic Transmitter-Receiver Transducers For Detection Of Non-Smooth Porous Surface, Raman K. Attri, Swaranjit Singh
Raman K. Attri
Level measurements, thickness measurement or remote surface detection using ultrasonic pulse transit method require that the target surface be at 90O to the incident beam so that reflected beam comes back at 180O angel to effectively use this method. This is perfectly true in case of flat, solid surface at right angle to the incident beam. But surface irregularities of a porous, non-smooth, uneven material such as snow cause penetration of incident wave into the surface, absorption of the incident energy, scatter of energy in many directions and further attenuation of reflected signal making it difficult to detect the reflected …
Snow Pack Temperature Sensor, M. Shamshi, Raman Attri, V. Sharma
Snow Pack Temperature Sensor, M. Shamshi, Raman Attri, V. Sharma
Raman K. Attri
The study of snow hydrological characteristics plays the major part in forecast of snow-melt, snow run-off water of rivers, potential release of snow avalan'che and climatic changes. Increasing importance of study of snow hydrology has lead to the development of many snow sensors which monitors physical parameter of snow. Design of such snow sensors has been a difficult job because of harsh environmental conditions. This paper present the design considerations and performance characteristics of snowpack temperature profile sensing probe. This probe provides temperature gradient and temperature distributions within the snow-pack, and ground at different depths. The information on temperature distribution …