scholarly journals USE OF SCHEMOTECHNICAL MODELING IN DESIGN OF ELECTRONIC DEVICES

2020 ◽  
Vol 2020 (1) ◽  
pp. 15-24
Author(s):  
Vladislav Borisov ◽  
Vladimir Mazur ◽  
Aleksey Pudalov
Keyword(s):  
Circuit Simulation ◽  
Electronic Devices ◽  
Sinusoidal Signal ◽  
Measuring Devices ◽  
Software Packages ◽  
Simulation Results ◽  
Quartz Resonators

Using sinusoidal signal generators as an example, the necessity of using circuit simulation in the design of measuring devices is shown. The simulation results of the Bubba and Butler generators in the National Instruments Multisim, Labcenter Electronics Proteus, and Cadence PSpice 16.5 software packages are presented. The results of calculating the parameters of quartz resonators used to stabilize the frequency of oscillators are shown.

Behavioral modeling of current conveyors for circuit simulation

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040155
Author(s):  
Ta-Chi Jeang ◽  
Hong-Qi Cai ◽  
Chih-Chin Yang ◽  
Chih-Lung Shen ◽  
Hung-Yu Wang
Keyword(s):  
Circuit Simulation ◽  
Simulation Models ◽  
Current Conveyors ◽  
Current Sensing ◽  
Measuring Devices ◽  
Speed Up ◽  
Current Measuring ◽  
Simulation Results ◽  
Behavior Models ◽  
Hspice Simulation

Behavior models are proposed for HSPICE simulation of first-, second- and third-generation current conveyors. They can be used to speed up the exploration and verification of current conveyor-based circuit designs. To demonstrate the feasibility and workability of the proposed HSPICE simulation models, they are used as the current measuring devices for grounded and floating current sensing, and the simulation results are consistent with the theoretical expectation. The flexibility in the current sensing capability of the CCIII is also shown by a practical example using the behavior model. HSPICE simulation results are given.

A Dicode Signaling Scheme for Capacitively Coupled Interface

2011 ◽  
Vol 497 ◽  
pp. 296-305
Author(s):  
Yasushi Yuminaka ◽  
Kyohei Kawano
Keyword(s):  
Partial Response ◽  
Data Transmission ◽  
High Speed ◽  
Circuit Simulation ◽  
Frequency Bandwidth ◽  
Capacitively Coupled ◽  
Limited Frequency ◽  
Simulation Results ◽  
Response Coding ◽  
The Impact

In this paper, we present a bandwidth-efficient partial-response signaling scheme for capacitivelycoupled chip-to-chip data transmission to increase data rate. Partial-response coding is knownas a technique that allows high-speed transmission while using a limited frequency bandwidth, by allowingcontrolled intersymbol interference (ISI). Analysis and circuit simulation results are presentedto show the impact of duobinary (1+D) and dicode (1-D) partial-response signaling for capacitivelycoupled interface.

An Offset Reduction Technique for Latch Type Sense Amplifier in High Performance and High Density SRAM

2012 ◽  
Vol 542-543 ◽  
pp. 769-774
Author(s):  
Qun Ling Yu ◽  
Na Bai ◽  
Yan Zhou ◽  
Rui Xing Li ◽  
Jun Ning Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Circuit Simulation ◽  
Cmos Technology ◽  
Optimal Operation ◽  
Reduction Technique ◽  
Total Speed ◽  
Sense Amplifier ◽  
Simulation Results ◽  
A New Technique ◽  
Total Energy Dissipation

A new technique for reducing the offset of latch-type sense amplifier has been proposed and effect of enable signal voltage upon latch-type sense amplifier offset in SRAM has been investigated in this paper. Circuit simulation results on both StrongARM and Double-tail topologies show that the standard deviation of offset can be reduced by 31.23% (StrongARM SA) and 25.2% (Double-tail SA) , respectively, when the voltage of enable signal reaches 0.6V in TSMC 65nm CMOS technology. For a column of bit-cell (1024 bit-cell), the total speed is improved by 14.98% (StrongARAM SA) and 22.26% (Double-tail SA) at the optimal operation point separately, and the total energy dissipation is reduced by 30.45% and 29.47% with this scheme.

scholarly journals Generation of 3-D Grid Multi-Scroll Chaotic Attractors Based on Sign Function and Sine Function

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2145
Author(s):  
Pengfei Ding ◽  
Xiaoyi Feng ◽  
Lin Fa
Keyword(s):  
Chaotic System ◽  
Circuit Simulation ◽  
Equilibrium Points ◽  
Time Shift ◽  
Chaotic Attractors ◽  
Sine Function ◽  
Sign Function ◽  
Simulation Results ◽  
Jerk System ◽  
Lyapunov Exponent Spectrum

A three directional (3-D) multi-scroll chaotic attractors based on the Jerk system with nonlinearity of the sine function and sign function is introduced in this paper. The scrolls in the X-direction are generated by the sine function, which is a modified sine function (MSF). In addition, the scrolls in Y and Z directions are generated by the sign function series, which are the superposition of some sign functions with different time-shift values. In the X-direction, the scroll number is adjusted by changing the comparative voltages of the MSF, and the ones in Y and Z directions are regulated by the sign function. The basic dynamics of Lyapunov exponent spectrum, phase diagrams, bifurcation diagram and equilibrium points distribution were studied. Furthermore, the circuits of the chaotic system are designed by Multisim10, and the circuit simulation results indicate the feasibility of the proposed chaotic system for generating chaotic attractors. On the basis of the circuit simulations, the hardware circuits of the system are designed for experimental verification. The experimental results match with the circuit simulation results, this powerfully proves the correctness and feasibility of the proposed system for generating 3-D grid multi-scroll chaotic attractors.

A High-Linear CMOS Down Conversion Mixer Using Adjusting the Second and Third-Order Harmonic in Transconductance Stage

2014 ◽  
Vol 24 (01) ◽  
pp. 1550002 ◽  
Author(s):  
Mina Amiri ◽  
Adib Abrishamifar
Keyword(s):  
Low Voltage ◽  
Supply Voltage ◽  
Circuit Simulation ◽  
Cmos Technology ◽  
Conversion Gain ◽  
Third Order ◽  
Cmos Mixer ◽  
Simulation Results ◽  
Down Conversion ◽  
Pmos Transistor

In this paper a new high-linear CMOS mixer is proposed. A well-known low voltage CMOS multiplier structure is used for mixer application in this paper and its linearity is provided by adjusting the value of a resistor, sizing the aspect ratio of a PMOS transistor and adding a proper value of inductor at the input stage. In simulation, a supply voltage as low as 1 V is applied to the circuit. Simulation results of improved mixer in a 0.18-μm CMOS technology illustrate 14 dB increases in IIP3 and also an increase around 1.4 dB is obtained in conversion gain. Furthermore, additional components which are used for improving linearity would not increase the power consumption and area significantly.

A New AC-Driving Method for Active-Matrix OLED Displays

2005 ◽  
Vol 475-479 ◽  
pp. 1901-1904
Author(s):  
Xin Fa Chen ◽  
Yujuan Si ◽  
Yi Zhao ◽  
Shi Yong Liu
Keyword(s):  
Recovery Time ◽  
Circuit Simulation ◽  
Current Source ◽  
Active Matrix ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Driving Mode ◽  
Organic Light ◽  
Pixel Circuit ◽  
Simulation Results

The lifetime of organic light-emitting devices can be influenced by the OLED material and structure, electrode material, driving mode and so on. Among all these factors, OLED driving method has been regarded as one of the most important factors, and it is well known that ac-driving mode improves the lifetime of OLED, especially pulse-driving mode with a reversed-biased voltage on OLED. In this article, a new ac-driving mode for Active-Matrix OLED is proposed on basic fabrication of two-TFT current source pixel circuit. Simulation has been done on the pixel and 1×4 matrix circuits, and simulation results have demonstrated that OLED is in reversed-biased state during recovery time. At last, a practical peripheral circuit that can provide achieve an ac-driving mode has been designed.

scholarly journals Study on evacuation simulation under crowd-diversion condition

2018 ◽  
Vol 10 (7) ◽  
pp. 168781401878509 ◽  
Author(s):  
Yung-Piao Chiu ◽  
Yan-Chyuan Shiau ◽  
Yi-Hsuan Lai
Keyword(s):  
Literature Review ◽  
Flow Diverter ◽  
Evacuation Simulation ◽  
Evacuation Time ◽  
Software Packages ◽  
Space Size ◽  
Crowd Evacuation ◽  
Simulation Results ◽  
Safety Evacuation ◽  
Occupant Evacuation

With the increasing number of domestic buildings, the importance of safety evacuation in case of fire in the buildings has been aware. Occupants in a building will crowd at exit(s) when they evacuate in disasters. The content of this study includes the following: (1) to conduct a literature review on severe stampedes in history, identifying the number of casualties, and to explore existing research on crowd evacuation; (2) to examine the applicability of software packages EXODUS and Unity for simulating occupant evacuation using them for simulations under identical conditions; and (3) to construct simulated evacuation environments using Unity and perform simulations with different combinations of occupant number, space size, exit size, and flow diverter size. The simulation results found that placing a flow diverter in front of the exit could reduce the evacuation time effectively. The best result was observed when the width of the door is close to the width of the flow diverter; it can reduce the evacuation time by about 25%. When more than 60 people were emptying through an exit below 120 cm width, the blocking happened regardless of whether a flow diverter was placed.

scholarly journals Bitstream Photon Counting Chirped AM Lidar with a Dual Unipolar Signal

2020 ◽  
Author(s):  
Brian Redman
Keyword(s):  
Integrated Circuits ◽  
Phase I ◽  
Signal To Noise Ratio ◽  
Photon Counting ◽  
Complementary Metal Oxide Semiconductor ◽  
Local Oscillator ◽  
Sinusoidal Signal ◽  
Oxide Semiconductor ◽  
Quadrature Phase ◽  
Simulation Results

This paper is a follow-up to three previous papers: the first introducing the new Bitstream Photon Counting Chirped Amplitude Modulation (AM) Lidar (PC-CAML) with the unipolar Digital Logic Local Oscillator (DLLO) concept, the second introducing the improvement thereof using the bipolar DLLO, and the third introducing the improvement of digital In-phase and Quadrature-phase (I/Q) demodulation.In that previous work, the signal was a single unipolar chirped sinusoidal or square wave. This paper introduces a new bitstream PC-CAML transceiver architecture that combines two unipolar chirped signals, referred to as the dual unipolar signal, to form a single bipolar signal in the receiver. (patent pending) This bipolar signal is mixed with the bipolar DLLOs in the in-phase (I) digital mixing and quadrature-phase (Q) digital mixing channels for digital I/Q demodulation for improved signal-to-noise ratio (SNR) compared to that when using a single unipolar signal.The simulation results presented in this paper indicate an SNR improvement for the dual unipolar chirped sinusoidal signal bitstream PC-CAML compared to that of the unipolar chirped sinusoidal signal bitstream PC-CAML (both with bipolar DLLOs and digital I/Q demodulation) of from about 3 dB to about 6 dB for signals below the onset of receiver saturation, and an improvement for maximum achievable SNR of about 13 dB if the receiver is allowed to saturate.The bitstream PC-CAML with a dual unipolar signal and bipolar DLLOs with digital I/Q demodulation architecture discussed in this paper adds complexity to the transmitter and receiver compared to the architectures presented in the previous papers. Whether or not this additional complexity is worth the improved SNR will have to be decided as part of system trade studies for particular systems and their applications.However, the new architecture still retains the key advantages of the previous bitstream PC-CAML architectures since it still replaces bulky, power-hungry, and expensive wideband RF analog electronics in the receiver with digital components that can be implemented in inexpensive silicon complementary metal-oxide-semiconductor (CMOS) read-out integrated circuits (ROICs) to make the bitstream PC-CAML with a DLLO more suitable for compact lidar-on-a-chip systems and lidar array receivers than previous standard PC-CAML systems.This paper introduces the dual unipolar signal and bipolar DLLOs with digital I/Q demodulation transceiver architecture for bitstream PC-CAML, and presents the initial SNR theory with comparisons to Monte Carlo simulation results.

scholarly journals CAD/CAE method of solving the hydrodynamic problem while developing powerful electronic devices

2018 ◽  
pp. 33-41 ◽  
Author(s):  
V. E. Trofimov ◽  
A. L. Pavlov ◽  
Y. G. Mamykin
Keyword(s):  
Operating System ◽  
Electronic Devices ◽  
Modeling Method ◽  
Free Software ◽  
Hydrodynamic Problem ◽  
Liquid Cooling ◽  
Software Packages

The article presents examples of the solution of the hydrodynamic problem that arises in the development of powerful electronic devices requiring liquid cooling using the CAD/CAE modeling method. The authors consider poorly documented or undocumented features of such solution based on the use of free software packages - SALOME, OpenFOAM and ParaView for the CAELinux operating system platform.

scholarly journals Use of accelerometer end gyroscope in biomechanical studies of horses

2020 ◽  
Vol 76 (12) ◽  
pp. 694-699
Author(s):  
KATARZYNA BECKER ◽  
DOROTA LEWCZUK
Keyword(s):  
Health Care ◽  
Electronic Devices ◽  
Non Invasive ◽  
Veterinary Research ◽  
Horse Riding ◽  
Measuring Devices ◽  
Diet And Exercise ◽  
Wide Scale ◽  
Biomechanical Tests ◽  
And Training

In recent years, along with the available techniques, the possibilities of measuring movement biomechanics have increased significantly. The monitoring of horses’ activity is useful for carers, trainers and riders, because it allows them to provide the horses with appropriate health care, as well as to select appropriate diet and exercise intensity. This was made possible by modern inertia measuring devices (IMUs), non-invasive electronic devices based on accelerometry and rotation analysis. The purpose of this study is to review biomechanical tests performed on horses by means of these devices. Measurements obtained with accelerometers and gyroscopes are used in the fields of veterinary research, behaviour analysis and training. The quantitative and qualitative monitoring of horses’ activity can play a key role in ensuring adequate living conditions and appropriate training loads. The first research using these techniques was carried out as early as the 1990s. Such research is currently used on a wide scale in biomechanical studies of horses, as well as in practice. Due to the growing interest in horse riding, it has become a valuable tool in training horses and in assessing their welfare.

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