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256 articles for “amplification”
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Amplification and in silico Study of Plasmodium vivax and Plasmodium falciparum LDH Gene
Abstract: Several arsenal as well as quinolone drugs are available for treatment of malaria; still it remains a worldwide public health problem. Malarial parasite quickly develops resistance under selective drug pressure. Hence, we require an array of new drugs for malaria treatment. Lactate dehydrogenase (LDH) is an essential enzyme for Plasmodia as they lack functional Krebs cycle in some stages of their lifecycle and thereby prove to be good targets for …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 2, Issue 3, 2012 · pp. 1–5 Read article
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Memristor Modelling for Common Source Amplifier Using 180 nm Technology
Abstract: The objective of this research paper is on memristor modeling for common source amplifier circuit using cadence virtuoso tool at gpdk 180 nm technology. A memristor is the fourth element count after resistor, inductor and capacitor in fundamental electrical circuits assumption is proposed by Leon Chua, its characteristics is based on already occurred principles of voltages (V), current (I), flux (ᵩ) and charge (q). Ohm’s law states relation voltage to …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 3, 2015 · pp. 45–54 Read article
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Performance Analysis of 160 Channel WDM System with EDFA Amplifier
Abstract: AbstractErbium Doped Fiber Amplifier (EDFA) amplifiers are popularly used in wavelength division multiplexing (WDM) system to compensate attenuation and dispersion. The performance of EDFA depends on various parameters such as, EDFA length, Er+3 doping concentration, active fiber length, pump power, pumping wavelength etc. This paper analyzed the performance of EDFA with counter pumping and co-pumping varying the EDFA length, pump power and Er+3 doping concentration and optimized the values for …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 3, 2017 · pp. 25–34 Read article
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BER Performance of Hybrid 2×8 SCM/WDM System Based on Raman Amplifier
Abstract: AbstractWhen subcarrier multiplexing (SCM) is combined with wavelength division multiplexing (WDM) the resultant hybrid multiplexing strategy can benefit from readily available commercial components. Hybrid SCM/WDM systems are quite useful for LAN and MAN applications. They can provide broadband integrated services to the subscriber. This paper investigates the performance of two module SCM transmitter that consist of eight binary phase shift keying modulated data streams each transmitted at a speed of …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 1, 2016 · pp. 1–7 Read article
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Analysis of Saturation Power based on Device Structural Parameters of a 1550 nm Symmetrical MQW Semiconductor Optical Amplifier
Abstract: AbstractThis paper presents the effect of device structure parameters on the saturation power of a 1550 nm symmetrical Multi Quantum Well (MQW) Semiconductor Optical Amplifier (SOA) for a small signal amplifier gain of 30 dB. Expressions are given to assess this dependency and the results indicate that saturation power decreases with the increase of the number of wells, well thickness and length but increases with the increase of barrier thickness. …
Published in Trends in Opto-electro & Optical Communication · Vol. 5, Issue 1, 2015 · pp. 13–18 Read article
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Evaluation of Nucleic Acid Amplification Method in Diagnosing Enteric Fever in Children
Abstract: The comparison of three detection methods (Widal test, Typhi dot and Nested PCR) for diagnosis of typhoid fever was done in laboratory where gold standard was either Widal positive or Typhi dot positive or both positive. A nested polymerase chain reaction (PCR) specific for Salmonella enteric serovar typhi was used for the detection of the pathogen in blood samples. Total 52 patients with clinical suspicion of typhoid fever were recruited …
Published in Research and Reviews: A Journal of Microbiology and Virology · Vol. 3, Issue 1, 2013 · pp. 9–15 Read article
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Stochastic Differential Equation Noise Analysis of Common-Gate Amplifier with Capacitive Load
Abstract: In this paper, common-gate amplifier with capacitive load is analysed to observe the effect of noise on the circuit. We used stochastic differential equations to analyse the effect of extrinsic noise. We adopted time domain approach and used SDE to obtain autocorrelation function for the output voltage. We determined mean and variance of the output noise. This analysis leads to obtain the circuit with better noise performance. Keywords: Common-gate amplifier, …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 1, 2018 · pp. 1–4 Read article
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Analysis of Operational Transconductance Amplifier using Low Power Techniques
Abstract: The paper presents a low power design of Current Mirror based Operational Transconductance Amplifier. The analysis of operational transconductance amplifier has been carried out using conventional gate-driven and low power techniques realised with quasi-floating gate, bulk-driven and bulk-driven quasi-floating gate transistors. The comparative analysis of performances of the amplifiers designed using the above techniques indicate that the best performance is achieved by bulk-driven quasi-floating gate approach. Using bulk as input, …
Published in Journal of Semiconductor Devices and Circuits · Vol. 2, Issue 1, 2015 · pp. 14–22 Read article
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Implementation of DCC technique using differential amplifier based filter in 90nm CMOS technology
Abstract: Analog technique with feedback loop is applied to correct the duty cycle of any circuit without using more power. Pulse width modification is used to vary the duty cycle of clock signal. PMC cell is designed for expansion and contraction of pulse width. Differential amplifier based filter is used to detect the duty cycle of the particular clock signal. Differential amplifier and OpAmp are used to achieve adequate gain. The …
Published in Journal of VLSI Design Tools and Technology · Vol. 9, Issue 2, 2019 · pp. 13–22 Read article
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A Low Power Variable Gain Amplifier for Biomedical Application
Abstract: This paper describes the design and simulation of low power variable gain amplifier used for biomedical application like hearing aid, Electronic Cardiograph and neural recording system. The MOS transistor is designed to operate in subthreshold region for low power application. The gain of amplifier is changed by selecting different values of input capacitor in the frequency range of 20 Hz–20 KHz. The simulated total power dissipation is 3µW. The gain …
Published in Journal of VLSI Design Tools and Technology · Vol. 4, Issue 3, 2014 · pp. 7–12 Read article
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Technology Limits on Differential Gain and Unity-gain Bandwidth of a Differential Amplifier: A Theoretical Analysis
Abstract: The limiting relationship between differential dc voltage gain and unity-gain bandwidth of an externally unloaded differential amplifier have been explored. It has been observed that the product of differential dc voltage gain and unity-gain bandwidth of a differential amplifier has an upper limit which is a technology constant. Keywords: Technology limits, differential amplifier
Published in Journal of VLSI Design Tools and Technology · Vol. 2, Issue 1-2-3, 2012 · pp. 118–124 Read article
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Optimized High Performance Characteristics of a Designed 1553 nm Wideband Travelling Wave Semiconductor Optical Amplifier
Abstract: AbstractIn this work, the performance characteristics of a designed 1553 nm Wideband Travelling Wave Semiconductor Optical Amplifier are presented. A high performance of the designed wideband SOA is obtained and analyzed with the optimized values of injection current, optical confinement factor, input power and active length. A maximum gain of 30.16 dB and minimum noise figure of 4.48 dB is obtained for 200 mA injection current, 0.33 optical confinement factor …
Published in Trends in Opto-electro & Optical Communication · Vol. 4, Issue 3, 2014 · pp. 32–39 Read article
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Comparison of Advance Data Modulation Formats in 4×10 Gbps WDM Optical Communication System using YDFA-EDFA and Raman-EDFA Hybrid Amplifiers
Abstract: In this paper, comparison of various advance data modulation formats in 4×10 Gbps wavelength division multiplexing (WDM) optical communication system using various hybrid optical amplifiers (YDFA-EDFA and Raman-EDFA) has been carried out. The advance modulation formats under study include non-return-to-zero (NRZ), return-to-zero (RZ), carrier-suppressed return-to-zero (CSRZ), Duobinary return-to-zero (DRZ) and modified Duobinary return-to-zero (MDRZ). The WDM hybrid system has been analyzed over 100 km fiber for 10 Gbps system. It …
Published in Current Trends in Information Technology · Vol. 10, Issue 1, 2020 · pp. 23–29 Read article
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Audio Amplifier with Improved SNR and high Bass control
Abstract: A class-AB amplifier is analysed and modified. Performance analysis of class-AB amplifiers was conducted, which happens to be the most successful topologies in the audio amplifier segment with regard to fidelity. The manufacturer’s rating of 20dB was increased to 200dB with certain circuit modifications as presented.
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 6, Issue 2, 2018 · pp. 30–32 Read article
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Design of Folded Cascode Amplifier for SCL 180 nm Technology Node for Low Power Applications
Abstract: In this paper, a design and simulations of a Folded Cascode Amplifier at an SCL 180 nm Technology has been done and the different way to implement the design for a given specification has also been clearly demonstrated. The given design also clearly indicates the way to improve the various design parameters for a given specification of a circuit at this node. The way to reduce the power dissipation of …
Published in Journal Of Network security · Vol. 8, Issue 1, 2020 · pp. 22–31 Read article
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Optimal Cell Sizing of CMOS Two-Stage Operational Amplifier using Cuckoo Search Algorithm
Abstract: Abstract: Operational amplifier (op-amp) is commonly used in different analog circuits such as amplifiers, oscillators, comparators, digital to analog converters, analog to digital converters, mixers etc. Manual cell sizing of a CMOS based op-amp circuit for VLSI application is a challenging, boring, and time-consuming work for engineers. So that, the automatic cell sizing of an op-amp is an eminent topic of growing technical and cost-effective significance. An evolutionary algorithm (EA) …
Published in Journal of Artificial Intelligence Research & Advances · Vol. 6, Issue 2, 2019 · pp. 109–118 Read article
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Development of a Novel Hybrid Precision Positioning Table Utilizing Stepper Motor and Amplified Piezo Actuator
Abstract: This research paper presents a unique actuating method for a single-axis precise positioning system using a combination of stepper motor and amplified piezo actuator (APA). The adopted method is to employ combination of two separate stages one above the other to achieve the precise positioning. The bottom stage uses a stepper motor (SM) coupled to a fine lead screw for coarse positioning stage (CPS). The secondary stage (SS) is mounted …
Published in Trends in Machine design · Vol. 2, Issue 1, 2015 · pp. 26–33 Read article
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Experimental Characterization of Amplified Piezo Stack Actuator for Controlled Actuation of Microgrippers
Abstract: This paper presents the results of experimental characterization of an Amplified Piezoelectric Actuator (APA) under quasi-static operation. The data obtained from the study will be used for designing a control system for a microgripper which will be actuated using the APA. An improved measurement method suited for static force measurement was devised. The study identified relation between force applied by the piezo-actuator in relation to the applied voltage and resultant …
Published in Trends in Machine design · Vol. 2, Issue 1, 2015 · pp. 59–65 Read article
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Study on Gain of Semiconductor Optical Amplifier (SOA) with Variation in Current, Wavelength and Power
Abstract: These days Semiconductor Optical Amplifier (SOA) is gaining popularity because of the versatile factor associated with it. It can be used as a gain unit, a modulator, wavelength converter, etc. But before using SOA, the change in gain of SOA with variation in current, wavelength and power should be known. In this paper, these three variations are studied and implemented using Opti System 7 software. Keywords: Semiconductor optical amplifier, Opti …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 2, 2014 · pp. 18–24 Read article
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Development of High Slew-Rate CMOS Operational-Amplifier
Abstract: In this paper operational-amplifier with high slew rate has been introduced. The simulation is carried out in 180 nm technologies. The supply voltage for 180 nm is 1.8 V. Different analysis for various characteristics of the operational amplifier such as gain, phase margin, slew rate, offset voltage and power dissipation is carried out in 180 nm CMOS technology. A current replicating branch with scaled-down transistors in combination with adaptive loads …
Published in Journal of VLSI Design Tools and Technology · Vol. 5, Issue 3, 2015 · pp. 128–131 Read article