Multi-Signal Generator Design

2012 ◽  
Vol 542-543 ◽  
pp. 584-590
Author(s):  
Xian Qin Han ◽  
Xiang Lei Zhu
Keyword(s):  
Frequency Modulation ◽  
Industrial Production ◽  
Sine Wave ◽  
Signal Generator ◽  
Electronic Equipment ◽  
External Circuit ◽  
Rectangular Wave ◽  
Modulation Wave ◽  
Generator Design

Signal generator is electronic equipment which can produce standard signals, and it often is used in industrial production electronic laboratories and the electronic equipment. Signal generator can achieve in a variety of methods, and the higher frequency and the more waveform is the better the signal generator condition. We can consider its implementation from the production and using areas. This paper will use function in the external circuit chip ICL8038 and electronic way to produce triangle wave, sine wave, rectangular wave,which are three basic rectangular waveforms, then the wave through ICM7216D, crystal, capacitors, switches and LED digital which are composed of the circuit to show the frequency and makes the sine wave produce a frequency modulation wave through FM circuit.

Based on the Max038 Digital Function Signal Generator Design

2013 ◽  
Vol 313-314 ◽  
pp. 1252-1255 ◽  
Author(s):  
Yi Jun Wang
Keyword(s):  
Sine Wave ◽  
Signal Generator ◽  
Single Chip ◽  
Function Generator ◽  
Wide Range ◽  
Digitally Controlled ◽  
Electronic Measurement ◽  
Generator Design ◽  
And Control ◽  
Measurement And Control

£oIn this paper, based on analysis of existing signal generator according to the system of indicators to a reasonable use of single-chip high-frequency precision function generator MAX038 control to produce the periodic waveform of the triangle wave, sine wave and square wave three. MAX038 chip as the core, the use of converters, digitally controlled potentiometers, electronic switches, proportional amplifier waveform type, amplitude, frequency programmable to adjust. The design frequency of mediation a wide range of high stability, and display are intuitive and easy to control. The high precision affordable price can be widely used in a variety of electronic measurement and control applications. Confirmed by the measurement of the effectiveness and feasibility of this program.

Comparing Shock, Random and Sine Vibration Loads of the Electronic Equipment

2005 ◽  
Author(s):  
Frank Fan Wang
Keyword(s):  
Dynamic Load ◽  
Random Vibration ◽  
Sine Wave ◽  
Electronic Equipment ◽  
Dynamic Loads ◽  
Peak Acceleration ◽  
Maximum Acceleration ◽  
Dynamic Excitations ◽  
Dynamic Damage ◽  
Resonant Point

It is a challenge to correlate different dynamic loads. Often, attempts are made to compare the peak acceleration of sine wave to the root mean square (RMS) acceleration of random vibration and shock. However, peak sine acceleration is the maximum acceleration at one frequency. Random RMS is the square root of the area under a spectral density curve. These are not equivalent. This paper is to discuss a mathematical method to compare different kinds of dynamic damage at the resonant point of the related electronic equipment. The electronic equipment will vibrate at its resonance point when there are dynamic excitations. The alternative excitation at the resonant frequency causes the most damage. This paper uses this theory to develop a method to correlate different dynamic load conditions for electronic equipment. The theory is that if one kind of dynamic load causes the same levels of damaging effects as the other, the levels of vibration can then be related.

scholarly journals Multi-channel DTV signal generator design using modified Farrow filter

2011 ◽  
Vol 8 (23) ◽  
pp. 1954-1960 ◽  
Author(s):  
Seo Weon Heo ◽  
Hyungsuk Kim
Keyword(s):  
Signal Generator ◽  
Generator Design

An influence of characteristics of amplitude fluctuation on detectability of alert sound of electric powered vehicles

2021 ◽  
Vol 263 (2) ◽  
pp. 4634-4640
Author(s):  
Nozomiko Yasui ◽  
Masanobu Miura ◽  
Tetsuya Shimamura
Keyword(s):  
Sine Wave ◽  
Amplitude Fluctuation ◽  
Amplitude Envelope ◽  
Complex Sound ◽  
Complex Sounds ◽  
Periodic Fluctuation ◽  
Modulation Wave ◽  
Amplitude Fluctuations ◽  
Actual Environment ◽  
Fluctuation Frequency

The motor sound on electric powered vehicle is quiet at low speeds. Thus, pedestrians have difficulty detecting the vehicles approaching them under urban noise. Although the vehicles were designed to play an alert sound to solve this problem, it has not been solved yet. Our previous studies found that characteristics of amplitude fluctuation, fluctuation frequency, non-periodic fluctuation and amplitude envelope, are effective to make them detect approaching vehicles. However, those studies were investigated under only a specific actual environment, weren't examined validity of detectability in those studies. Here, this paper investigates under another actual environment, examine the validity. Investigations were carried out by using synthesized complex sounds which were designed to have periodic and non-periodic amplitude fluctuations. Those complex sounds have characteristics of amplitude fluctuations in gasoline powered vehicle. Amplitude envelopes such as modulation wave in amplitude-modulated sound were set for deviations for time and amplitude, and amplitude-modulated complex sounds were synthesized using sine wave, sawtooth wave, and rectangle wave. Then, their effects on detectability by pedestrians were assessed in another actual environment. The results found that amplitude fluctuation enhances the ability with which people detect approaching electric powered vehicles in case of some complex sound.

The Design and Implementation of High Precision Three-Phase Sine-Wave Signal Generator

2014 ◽  
Vol 543-547 ◽  
pp. 838-841
Author(s):  
Shou Qiang Kang ◽  
Shan Shan Li ◽  
Shi Zheng ◽  
Di Wu
Keyword(s):  
High Precision ◽  
Design Method ◽  
Synthesis Method ◽  
Sine Wave ◽  
Signal Generator ◽  
Lookup Table ◽  
Direct Digital Frequency Synthesis ◽  
Wave Signal ◽  
Design And Implementation ◽  
Three Phase

A design and implementation method of high precision three-phase sine-wave signal generator is proposed based on MCU and FPGA. For the traditional design method, direct analog synthesis method and phase locked loop (PLL) technology are used to design the signal generator. So the function, the precision and other aspects are inadequate. Aiming to the problem, a signal generator is designed based on direct digital frequency synthesis (DDS) technology. The MCU is used to control the peripheral devices and the frequency and phase control word can be obtained. The DDS module is achieved by EP4CE6E22C8 and the waveform lookup table addresses are outputted. The digital three-phase sine-wave data can be read from the lookup table. Through the three-way D/A converter and the amplifier circuit, the digital signal is converted to analog signal and the three-phase sinusoidal wave is outputted. The precision can be improved by increasing the sampling points, phase accumulator bits and D/A bits, and then, high precision three-phase sine-signal can be obtained and the adjustable frequency precision is 0.001.

Research of FMCW for Perfect Binary Sequences Pairs

2013 ◽  
Vol 401-403 ◽  
pp. 1419-1423
Author(s):  
Hui Long Jin
Keyword(s):  
Key Words ◽  
Target Detection ◽  
Frequency Modulation ◽  
Correlation Functions ◽  
Radar System ◽  
Signal Generator ◽  
Binary Sequences ◽  
Auto Correlation ◽  
Stepped Frequency ◽  
New System

An improved FMCW auto-collision radar system is introduced. The system includes perfect binary sequences pairs theory, the method using auto-correlation functions to get target signal and measure distance, this enables itself to get constant development with theoretical progress. The new system only changes the program of signal generator a little, moreover it can be realized by DSP, which can reduce the false alert notably so as to be applied increasingly widely. Key words: stepped-frequency modulation; multi-target detection; perfect binary sequences pairs

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