Description: 用fpga实现的DA转换器，有说明和源码，VDHL文件。
A PLD Based Delta-Sigma DAC
Delta-Sigma modulation is the simple, yet powerful,
technique responsible for the extraordinary
performance and low cost of today s audio CD
players. The simplest Delta-Sigma DAC consists of a
Delta-Sigma modulator and a one bit DAC. Since,
both of these components can be realized using
digital circuits, it is possible to implement a low
precision Delta-Sigma DAC using a PLD.-Using FPGA to achieve the DA converter, has descriptions and source code, VDHL document. A PLD Based Delta-Sigma DACDelta-Sigma modulation is the simple, yet powerful, technique responsible for the extraordinaryperformance and low cost of today s audio CDplayers. The simplest Delta-Sigma DAC consists of aDelta-Sigma modulator and a one bit DAC. Since , both of these components can be realized usingdigital circuits, it is possible to implement a lowprecision Delta-Sigma DAC using a PLD. Platform: |
Size: 58368 |
Author:开心 |
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Description: 高阶sigma-delta调制器设计matlab工具包,
半波带滤波器设计工具包，内有使用说明-High-order sigma-delta modulator design matlab toolkit, half-wave band Filter Design Toolkit, which has the use of Platform: |
Size: 549888 |
Author:张鸿 |
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Description: The intention of the work is to analyze the feasibility of using a Sigma-Delta modulator based analog-to-digital converter for true random number generation, whereas the noise source is integrated into modulator’s loop as well as
design a Sigma-Delta modulator ADC circuit structure on 90nm CMOS technology and additional digital-signal processing blocks for generation of a random bit stream Platform: |
Size: 1990656 |
Author:Hassan Abdelaziz |
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Description: In this paper, we propose and study an adaptive delta modulator
that has improved SNR performance and better robustness
in tracking highly varying signals. The step-size
adaptation used in this modulator is based on information
about the absolute value of the quantizer input. The modulator
is shown to be free of zero-input limit cycles and is Platform: |
Size: 270336 |
Author:afiri |
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Description: Determine the SNR for a delta-sigma modulator by using simulations.
The modulator is described by a noise transfer function (ntf)
and the number of quantizer levels (nlev). Platform: |
Size: 2048 |
Author:hamdi |
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Description: generation of wideband high dynamic range analog signal for area-efficient MADBIST, especially for the on-chip testing of wireless communication IF digitizing sigma–delta modulator chip. Via increasing the order of the one-bit bandpass sigma–delta modulation algorithm up to 12 and using finite repetitious bitstream approximating scheme, it can achieve great improvements in signal bandwidth instead of purity at the cost of very little hardware overhead. Another contribution in this work is to provide the theoretical analysis of the reconstructed signal degradation due to harmonic distortion and clock jitter. Such on-chip analog stimulus generation scheme is especially fit for IF digitizing bandpass sigma–delta modulator chip s production-time testing and in-the-field diagnostics. The technique can also be extended to mixed-signal communication SoC built-in-self-test.- generation of wideband and high dynamic range analog signal for area-efficient MADBIST, especially for the on-chip testing of wireless communication IF digitizing sigma–delta modulator chip. Via increasing the order of the one-bit bandpass sigma–delta modulation algorithm up to 12 and using finite repetitious bitstream approximating scheme, it can achieve great improvements in signal bandwidth instead of purity at the cost of very little hardware overhead. Another contribution in this work is to provide the theoretical analysis of the reconstructed signal degradation due to harmonic distortion and clock jitter. Such on-chip analog stimulus generation scheme is especially fit for IF digitizing bandpass sigma–delta modulator chip s production-time testing and in-the-field diagnostics. The technique can also be extended to mixed-signal communication SoC built-in-self-test. Platform: |
Size: 5120 |
Author:Nupur Naik |
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Description: simulink模拟的二阶sigma delta调制器 可以提高传输速率 中间用到了半带滤波器和FIR滤波器CIC滤波器 进行过采样-Simulink simulation of second order sigma delta modulator can improve the transmission rate use among the half took filter and FIR filter CIC filter sample
Platform: |
Size: 68608 |
Author:李小白 |
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Search - sigma delta modulator