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Partial Binary Tree Network (PBTN)- A New Dynamic Element Matching (DEM) approach for Digital Analog Converter (DAC)

Partial Binary Tree Network (PBTN)- A New Dynamic Element Matching (DEM) approach for Digital Analog Converter (DAC) / William Yeap Keat Seong
Penukar Digital Analog (DAC) merupakan segmen penting yang sentiasa digunakan dalam kebanyakan sistem digital yang meyakinkan penukaran data yang tepat. Disebabkan faktor-faktor seperti penggunaan voltan yang semakin rendah, kesuntukan masa untuk kajian, serta keperluan lebar jalur yang meningkat, ini telah menyumbang kepada keperluan model DAC untuk bergantung terhadap komponen yang ditetapkan bagi melaksanakan penukaran data. Penghasilan komponen yang sempurna amatlah susah, kesilapan yang tidak sepadan masih senantiasa berlaku dan menyumbang kepada perbezaan di antara nilai komponen yang diingini dan sebenar. Salah satu cara yang popular untuk mengurangkan ralat komponen ialah Pemadanan Elemen Dinamik (DEM). Teknik perawakan ini memilih nilai input digital secara rawak sebelum memasuki blok DAC. Ini dapat menyamakan purata masa untuk setiap komponen dan kesan perbezaan komponen dalam litar elektronik dapat dikurangkan. Kelemahan bagi penyelidikan yang sedia ada ialah DAC akan memerlukan perkakasan yang berlebihan dan pengekod yang rumit. Dengan ini, banyak get penghantaran akan diperlukan menyebabkan berlakunya gelinciran. Kajian ini melaporkan keputusan simulasi 6-bit 1-MSB PBTN dengan DNL 0.00001895 LSB, INL 0.0001457 LSB, pengunaan kuasa 104.7mW; 6-bit 1-MSB PBTN dengan DNL -0.00928 LSB, INL 0.008669 LSB, pengunaan kuasa 103.8mW; 8-bit 1-MSB dengan DNL -0.00028287 LSB, INL 0.000252 LSB, pengunaan kuasa 115.4mW, and 8-bit 2-MSB dengan DNL 0.001324 LSB, INL 0.0007896 LSB, pengunaan kuasa 114.5mW. _______________________________________________________________________________________________________ Digital-to-analog converters (DACs) are essential operations in numerous digital systems which demands high performance data converters. With shrinking supply voltage, budget constraints of test times, and rising bandwidth requirement causing DAC architectures highly relying on matched components to perform data conversions. However, matched components are nearly impossible to manufacture, there will always be mismatch errors which causes discrepancies between the desired value and designed value. A popular method to minimize component mismatch error is Dynamic Element Matching (DEM). This technique is a randomization technique to select one of the appropriate codes for each of the digital input value before entering the DAC block. Using this technique, the time averages of the equivalent components at each of the component positions are equal or nearly equal to reduce the effects of component mismatches in electronic circuits. The drawback of existing designs is that the design would suffer from excessive hardware complexity. A complicated encoding is usually necessary for conventional DEM encoders which will lead to a lot of switch transitions at the same time and it will cause glitches to the output signal. This paper reports the simulation results of 6-bit 1-MSB PBTN with DNL of 0.00001895 LSB, INL of 0.0001457 LSB, power consumption of 104.7mW; 6-bit 1-MSB PBTN with DNL of -0.00928 LSB, INL of 0.008669 LSB, power consumption of 103.8mW; 8-bit 1-MSB with DNL of -0.00028287 LSB, INL of 0.000252 LSB, power consumption of 115.4mW; and 8-bit 2-MSB with DNL of 0.001324 LSB, INL of 0.0007896 LSB, power consumption of 114.5mW.
Contributor(s):
William Yeap Keat Seong - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875007147
Barcode : 00003107025
Language:
English
Subject Keywords:
Digital-to-analog converters; data conversions; Dynamic Element Matching
First presented to the public:
6/1/2017
Original Publication Date:
4/18/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 79
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-04-18 15:16:08.527
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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Partial Binary Tree Network (PBTN)- A New Dynamic Element Matching (DEM) approach for Digital Analog Converter (DAC)1 2018-04-18 15:16:08.527