scholarly journals A Low-Cost Programmable Arbitrary Function Generator for Educational Environment

2020 ◽  
Author(s):  
Mani Dargahi Fadaei
Keyword(s):  
Arbitrary Function ◽  
Low Cost ◽  
Educational Environment ◽  
Function Generator

Design and Simulation of Signal Generator Based on FPGA

2014 ◽  
Vol 608-609 ◽  
pp. 949-953
Author(s):  
Qiang Chen
Keyword(s):  
Frequency Synthesizer ◽  
Low Cost ◽  
Basic Structure ◽  
Frequency Synthesis ◽  
Function Generator ◽  
Current Function ◽  
Digital Frequency ◽  
Development Cycle ◽  
Short Development Cycle ◽  
Direct Digital Frequency Synthesizer

The article introduced the basic structure and the realization principle of direct digital frequency synthesizer (DDS), and analyzed main properties of DDS system, compared the different ways to achieve frequency synthesis to determine the design scheme in this paper. In addition to the realization of general waveform, the output of the system can realize any hand-painted waveform, improve the shortcomings of the current function generator, and also has the advantages of low cost, low power consumption, short development cycle, flexible design, has the very good practical value and broad application prospect.

Development of an arbitrary function generator and test system for nuclear spectrometers

2011 ◽  
Vol 46 (8) ◽  
pp. 730-733 ◽  
Author(s):  
O. Avci ◽  
S. Bayburt ◽  
M. Bayburt ◽  
C. Celiktas
Keyword(s):  
Arbitrary Function ◽  
Test System ◽  
Function Generator

An arbitrary function generator for the electromagnetic insertion devices at the APS

2002 ◽  
Vol 73 (3) ◽  
pp. 1427-1429 ◽  
Author(s):  
B. N. Deriy ◽  
O. A. Makarov ◽  
I. B. Vasserman
Keyword(s):  
Arbitrary Function ◽  
Function Generator

Dynamic Analysis of a Ramp-Roller Clutch

1997 ◽  
Author(s):  
Chin-Tzung Chang ◽  
Ali A. Seireg
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Behavior ◽  
Arbitrary Function ◽  
Settling Time ◽  
Phase Shifting ◽  
Design Parameters ◽  
Mechanical Function ◽  
Function Generator ◽  
Function Generation ◽  
Damping Characteristics

Abstract This study deals with the design and dynamic analysis of a ramp-roller clutch which can be utilized in developing a mechanical function generator. The dynamic behavior with non-linear torsional spring and damping characteristics is first investigated. Three major design parameters are identified and further optimized for the objective of minimizing the settling time. As a result of underdamping, undesired vibration can occur during the engagement. In order to minimize these unwanted vibrations, coulomb dampers are considered. By adding a properly tuned auxiliary damper, the settling time can be significantly reduced. An example is also given to illustrate the use of one-directional clutches for mechanical function generation where an arbitrary function is synthesized by sequentially triggering 7 clutches. Phase shifting is incorporated in the to reduce the error in the generated function.

Passive Wireless Sensing of Temperature Using RF Technology

2007 ◽  
Author(s):  
Miaogeng Zhang ◽  
Luis Gonzalez-Argueta ◽  
V. Sundararajan
Keyword(s):  
Low Cost ◽  
Voltage Divider ◽  
Sensor Nodes ◽  
Measured Signal ◽  
Wireless Sensing ◽  
Function Generator ◽  
Variable Resistor ◽  
Power Characteristics ◽  
Rf Design ◽  
Loop Antennas

Sensor networks are emerging as an attractive technology for deployment in monitoring applications due to their flexibility, small size, ease of installation, low cost and low power characteristics. Since the wireless nodes use batteries as energy sources, their operating lives are limited by the life of the batteries. Replacing batteries periodically in a sensor network can be a burden as the nodes may be dispersed over a wide area. Moreover the battery increases the size of the sensor nodes and offsets one of the primary advantages of such networks. This study proposes a design for wireless sensing of temperature based on passive RF-technology. The experimental setup includes: 1) signal generator 2) sensor tag 3) receiver. The carrier signal is produced by function generator. The sensor tag consists of a voltage divider circuit combined with loop antennas. The sensor tag filters the carrier signal and transmits back a modulated signal of the same frequency. The variable resistor acting as a thermistor is connected as a voltage divider. The change in amplitude of the output signal is relative to the temperature change. Experimental results show that the passive RF design can be effective way for wireless temperature monitoring. The results can be generalized to any sensor that converts the measured signal into a change of resistance.

scholarly journals Supercapacitor fractional model − DAQ-based measurements of frequency characteristics and error computation

2019 ◽  
Vol 28 ◽  
pp. 01027 ◽  
Author(s):  
Marcin Sowa ◽  
Agnieszka Jakubowska-Ciszek
Keyword(s):  
Parameter Estimation ◽  
Data Acquisition ◽  
Arbitrary Function ◽  
Estimation Procedure ◽  
Frequency Characteristics ◽  
Function Generator ◽  
Parameter Estimation Procedure ◽  
Measurement Results ◽  
Measurement Basis ◽  
Error Computation

The study concerns the modelling of a supercapacitor. The frequency characteristics are selected as the measurement basis for the study. The characteristics are obtained through a measurement setup featuring a data acquisition (DAQ) device and an arbitrary function generator (AFG). After the characteristics had been obtained − a parameter estimation procedure is executed. The response of the model is then compared with the measurement results. An error definition determining the agreement of the frequency characteristics is introduced. It takes into account both the real and imaginary parts of the obtained impedances.

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