[PDF] Simulation of Sigma Delta Convertor Using MATLAB and Simulink





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Frequency Response: Notch and Bandpass Filters

1. Plot the frequency response of an FIR filter. 2. Implement and apply an FIR filter in MATLAB. 3. Design an FIR filter for nulling frequency components.



Chapter 4: Problem Solutions

With Matlab we need first to determine the order of the filter. the impulse response of a FIR filter which approximates this frequency response.



DT0088 Design tip - FIR filter design by sampling windowing and

16 nov. 2017 Then it uses the MATLAB function freqz() to compute the frequency response. The script also feeds the filter with white noise. Then it uses the ...



Process and Analysis of Voice Signal by MATLAB

26 mai 2014 time-domain the frequency spectrum and the characteristics of the voice signal. We ... 3.5 Design of FIR and IIR filter in MATLAB .



Simulation of Sigma Delta Convertor Using MATLAB and Simulink

Sigma-delta A/D converters attain the highest resolution for Effect of the digital filter on the noise bandwidth. ... Frequency response of filter FIR1.



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Frequency Response of a FIR. 1. When the input is a discrete-time complex exponential signal the output of an FIR filter is also a discrete-time complex 



Design of FIR Filters

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Laboratory Exercise 4

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Response Maskingfor Efficient Narrow Transition Band FIR Filters

Implementation of Narrow-Band Frequency-Response Masking for Efficient Narrow Transition Band FIR Filters on FPGAs. Syed Asad Alam and Oscar Gustafsson.

Presented by

Arindam Mal

LEOS/ISAC/ISRO

Arindam M al, H.S. Rvindra, Subhalakshmi Krishnamoorthy ySuccessive approximation, subranging, and flash converters are called nyquist-rate converters. ySigma-delta A/D converters attain the highest resolution for relatively low signal bandwidths. ySingle loop sigma delta modulators yMulti stAge noise Shaping(MASH) sigma delta modulators

Y=STF1X+(NTF1 H2-H1 NTF2).E1+

H2.NTF2 .E2

Y=STF1X+NTF1 .E

Effect of the digital filter on the noise

bandwidth.

FFT diagram of a multi-bit ADC with a

sampling frequency kFS.

OVER SAMPLING

First order sigma-delta ADC block diagram

05101520253035404550-150

-100 -50 0 50
100
150
X: 10

Y: 112.7

Frequency (Hz)

Power/frequency (dB/Hz)

Periodogram Power Spectral Density Estimate

X: 20

Y: 8.749

05101520253035404550-150

-100 -50 0 50
100
150
X: 10

Y: 111.8

Frequency (Hz)

Power/frequency (dB/Hz)

Periodogram Power Spectral Density Estimate

X: 20.03

Y: -7.149

0102030405060708090100-150

-100 -50 0 50
100
150
X: 10

Y: 109.6

Frequency (Hz)

Power/frequency (dB/Hz)

Periodogram Power Spectral Density Estimate

X: 20.01

Y: -12.86

0102030405060708090100-150

-100 -50 0 50
100
150
X: 10

Y: 121.4

Frequency (Hz)

Power/frequency (dB/Hz)

Periodogram Power Spectral Density Estimate

X: 19.98

Y: -8.408

020406080100120140160180200-150

-100 -50 0 50
100
150
200

X: 9.999

Y: 151.1

Frequency (Hz)

Power/frequency (dB/Hz)

Periodogram Power Spectral Density Estimate

X: 20.04

Y: 30.22

020406080100120140160180200-150

-100 -50 0 50
100
150
200

X: 9.999

Y: 151.1

Frequency (Hz)

Power/frequency (dB/Hz)

Periodogram Power Spectral Density Estimate

X: 20.04

Y: 30.22

Fig . Frequency response of filter FIR1

TWO STAGES OF FIR FILTERING

Fig . Frequency response of CIC filter

SOFTWARE REFERENCE MODELING OF DECIMATION

FILTER:

CASCADED INTEGRATED COMB (CIC) FILTER:

Order of SDMDecimationFactorSNR(dB)

1storder102488

2ndorder512104

3rdorder256120

4thorder128121

Table-I

Order of Mash

SDM

DecimationFactorSNR(dB)

Mash 1-1256118

Mash 1-1-1128129

Mash 2-264120

Table-II

ySingle loop SDM comparator overloading and stability of the system limit the overall SNR. yHere feed forward architecture used because of better linearity . yMASH SDM over all performance is comparable with single loop SDM at lower OSR. yLEOS has realized MASH1-1-1 structure using discrete rad-hard component. yOverall MASH, and SDM model realized first using

MATLAB SIMULINK and MATLAB FDA Tool.

[3] BabitaRoslind, Design Techniques For Sigma-Delta Based AdcFor Wireless Applications Jose

[4] Steven R. Norsworthy, Richard Schreierand Gabor C.Temes, Delta-Sigma Data Converters, IEEE circuits and

systems society [5] N. Maghari, S. Kwon, G. C. Temesگ

1269-1270, Oct. 2006.

[6] N. Maghari, S. Kwon, G. C. Temes, and U. Moon, -ϕ-ǻ Int. Symp. On Circuit andSystem, ISCAS 2007, pp 257-260 [7] Yung-Fu Lin, Design of Multi-Stage Noise Shaping Sigma-Delta Modulator [8] Chun-HsienSu, B.S., M.S, A MultibitCascaded Sigma-Delta Modulator With DacError Cancellation

Techniques

[9]XIAOLONG YUAN, Wideband Sigma-Delta Modulators [10]Jose Barreiro daSilva, High-Performance Delta-Sigma Analog-to-Digital Convertersquotesdbs_dbs14.pdfusesText_20
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