High-Precision Quadrature Signal Generator for Digital Demodulation of MEMS Gyroscope

2015 ◽  
Vol 645-646 ◽  
pp. 561-565
Author(s):  
Dan Hua Chen ◽  
Li Chen ◽  
Hui Zhou ◽  
Ying Tian
Keyword(s):  
Standard Deviation ◽  
High Stability ◽  
Signal Generator ◽  
Test Results ◽  
Direct Digital Synthesis ◽  
Mems Gyroscope ◽  
Quadrature Signal ◽  
Digital Synthesis ◽  
Fpga Chip ◽  
Digital Demodulation

A new quadrature signal generator based on Direct Digital Synthesis (DDS) algorithm for digital demodulation of MEMS gyroscope was proposed in this paper. To avoid quantization error, the dual-accumulator with signal-ROM structure was adopted. This signal generator was realized in FPGA chip, which could be quit compact to realize all digital demodulation in one chip. Simulations and tests of the generator were carried out. The test results demonstrate that the signal generator achieves high stability. The standard deviation of the frequency is 0.075Hz and the standard deviation of the amplitude is 0.037mV.

scholarly journals Direct digital synthesis generator

2020 ◽  
Author(s):  
Kornei Sergeevich Tertychnyi
Keyword(s):  
Signal Generator ◽  
Direct Digital Synthesis ◽  
Signal Synthesis ◽  
Digital Synthesis

This article illuminates one of the most promising methods for signal synthesis and also describes the basic elements used to create a signal generator and the possibility of manufacturing the device.

scholarly journals Design and Analysis of a Low Cost Wave Generator Based on Direct Digital Synthesis

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Jian Qi ◽  
Qun Sun ◽  
Xiaoliang Wu ◽  
Chong Wang ◽  
Linlin Chen
Keyword(s):  
Low Cost ◽  
Signal Generator ◽  
Frequency Resolution ◽  
Direct Digital Synthesis ◽  
Basic Principles ◽  
Display Module ◽  
Output Amplitude ◽  
Digital Synthesis ◽  
System Module ◽  
Minimum System

Signal generators are widely used in experimental courses of universities. However, most of the commercial tests signal generators are expensive and bulky. In addition, a majority of them are in a fixed working mode with many little-used signals. In order to improve this situation, a small sized and highly accurate economic signal generator based on DDS technology has been developed, which is capable of providing wave signals commonly used in experiments. Firstly, it is introduced the basic principles of DDS and is determined the overall scheme of the signal generator. Then, it proposes a design of the hardware, which include power supply module, display module, keyboard module, waveform generating module based on DDS chip, and the minimum system module based on C8051F010. The signal generator was designed to output sine and square waveforms, and the other achieved performances included the frequency range 0.1 Hz–12.5 MHz, the frequency resolution 0.05 Hz–0.1 Hz, the output amplitude 1.0–4.5 V, the frequency accuracyKfmin=94.12% andKfmax=99.99%, and the signal distortionRTHDmin=0.638% andRTHDmax=11.67%.

Decrement Signal Generator of High-Precision E Exponential Based on ARM

2012 ◽  
Vol 241-244 ◽  
pp. 614-617
Author(s):  
Bing Qi Yin ◽  
Yuan Wang ◽  
Li Yang ◽  
Shan Shan Guan ◽  
Pei Pei Tian ◽  
...  
Keyword(s):  
Digital Technology ◽  
Signal Amplitude ◽  
High Accuracy ◽  
Sampling Time ◽  
Signal Generator ◽  
Direct Digital Synthesis ◽  
Electromagnetic System ◽  
Transient Electromagnetic ◽  
Digital Synthesis ◽  
Conversion Time

With the development of electronic technology, the signal generator used in most of the lab employs direct digital synthesis (DDS) technology. The signal generator using digital technology has advantages of high resolution and short conversion time and so on [1, 2]. Through ARM chip STM32F103VET6, we realize the control to the chip AD5791. At the same time, it engender high-accuracy periodic e exponential decremented signal. Doing above, we correct transient electromagnetic system which has been manufactured. The output signal amplitude is 5V. Frequency can be adjusted according to the sampling points and sampling time of the receiving device.

Design and Implementation of Signal Generator Based on DDS

2013 ◽  
Vol 380-384 ◽  
pp. 3643-3647
Author(s):  
Hong He ◽  
Jin Zhou Zhang ◽  
Zhi Hong Zhang
Keyword(s):  
Duty Cycle ◽  
Pulse Width ◽  
Signal Generator ◽  
Direct Digital Synthesis ◽  
Verilog Hdl ◽  
Design And Implementation ◽  
Quartus Ii ◽  
Digital Synthesis ◽  
Frequency Phase

A signal generator with adjustable frequency, phase and duty cycle is designed in this paper. The design of this signal generator is based on the technology of direct digital synthesis (DDS).The classic structure of DDS is presented and its principles are introduced in detail. The key modules of the design such as phase accumulator and pulse width processing are implemented by verilog HDL language. With suitable FPGA, the designed signal generator and all modules of the design are simulated successfully in Quartus II.

A Novel Method to Calculate Frequency Control Word of Direct Digital Synthesizer

2011 ◽  
Vol 267 ◽  
pp. 433-437
Author(s):  
Jian Guo ◽  
Jie Zhu ◽  
Jiu Liu ◽  
Li Zhou
Keyword(s):  
Frequency Control ◽  
Control Word ◽  
Signal Generator ◽  
New Method ◽  
Storage Space ◽  
Direct Digital Synthesis ◽  
Direct Digital Synthesizer ◽  
Digital Synthesis ◽  
Novel Method ◽  
Low Efficiency

When designing signal generator with adjustable frequency based on direct digital synthesis technology (DDS), it is very important to calculate the frequency control word. To address the shortcoming of large computation, low efficiency of frequency setting, more storage space occupied or significant cumulative errors of frequency setting when calculating frequency control word with traditional methods, a novel calculation way for frequency control word is researched in this paper. This new method does not need large computation and more space and simultaneously it can decrease the error greatly, which plays an important role in improving the frequency setting speed and precision in signal generator.

scholarly journals Low distortion signal generator based on Direct Digital Synthesis for ADC Characterization

ACTA IMEKO ◽  
2012 ◽  
Vol 1 (1) ◽  
pp. 59 ◽  
Author(s):  
Walter Fabian Adad ◽  
Ricardo Javier Iuzzolino
Keyword(s):  
Signal Generator ◽  
Frequency Resolution ◽  
Frequency Range ◽  
Direct Digital Synthesis ◽  
Digital Synthesis ◽  
Low Distortion ◽  
The Stability

<p class="Abstract"><span lang="EN-US">This paper presents a low distortion signal generator with a frequency range from 0 to 10 kHz using the direct digital synthesis (DDS) method for ADC characterization. The results show that the maximum distortion in the whole frequency range is -80.37 dB, the frequency resolution is 1.421 nHz (with a 48-bits DDS chip), the stability in frequency is 25 µHz/Hz and the amplitude stability is 13 µV/V.</span></p>

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