a power efficient 6-bit tiq adc design for portable applications
DESCRIPTION
A Power Efficient 6-Bit TIQ ADC Design for Portable Applications. Professor : Da- Huei Lee Student : Zong -You He MA230203 何宗侑. outline. Introduction TIQ Comparator Reference. INTRODUCTION. 奈奎氏取樣率 ( Nyquist -Rate) 超 取樣 (Oversampling) TIQ Comparator. - PowerPoint PPT PresentationTRANSCRIPT
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A POWER EFFICIENT 6-BIT TIQ ADC DESIGN FOR PORTABLE
APPLICATIONS
Professor : Da-Huei Lee
Student : Zong-You He
MA230203
何宗侑
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OUTLINE
Introduction
TIQ ComparatorReference
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INTRODUCTION
奈奎氏取樣率 (Nyquist-Rate)超取樣 (Oversampling)TIQ Comparator
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奈奎氏取樣率 (NYQUIST-RATE)ADC
在訊號取樣時( Sampling),會造成失真的現象( aliasing),為避免訊號失真,信號在取樣時所使用的頻率,必須要為原訊號頻率的二倍以上,即為奈奎斯特取樣定理( Nyquist Sampling Theorem),而此取樣頻率則稱為奈奎斯特頻率( Nyquist frequency)或稱為奈奎斯特率( Nyquist rate)。
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超取樣 (OVERSAMPLING)
超取樣類比數位轉換器通常操作在 20倍到 512倍的輸入奈奎氏率,藉由濾除頻帶以外的量化雜訊,以提高輸出訊號的雜訊比 (Signal to Noise Ratio:SNR),等於是利用頻寬換精確度。
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FLASH ADC
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TIQ(THRESHOLD INVERTING QUANTIZATION) FLASH ADC
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FOUR CASCADED INVERTERS ARE USED AS TIQ COMPARATOR CIRCUIT
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3BIT TIQ
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TIQ SIMULATION
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DIFFERENT SCHEMAS ADC
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REFERENCE Mishra, S.N., Arif, W., Mehedi, J., Baishya, S., “A Power Efficient 6-Bit TIQ ADC Design for Portable
Applications,” Consumer Electronics ?? Berlin ICCEBerlin 2013. IEEE Third International Conference on, pp.235-239, Sept. 2013
侯岳宏,民國 97年 6月,切換電流式三角積分調變器設計與實作碩士論文,台北 :台北科技大學電機工程系碩士班。
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THANK YOU
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