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A Power Efficient 6-Bit TIQ ADC Design for Portable Applications

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.

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A Power Efficient 6-Bit TIQ ADC Design for Portable Applications

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  1. A Power Efficient 6-Bit TIQ ADC Design for Portable Applications Professor : Da-Huei Lee Student : Zong-You He MA230203 何宗侑

  2. outline • Introduction • TIQ Comparator • Reference

  3. INTRODUCTION • 奈奎氏取樣率(Nyquist-Rate) • 超取樣(Oversampling) • TIQComparator

  4. 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）。

  5. 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。

  6. flash adc

  7. Tiq(threshold inverting quantization) flash adc

  8. Four cascaded inverters are used as TIQ comparator circuit

  9. 3bit TIQ

  10. Tiq Simulation

  11. Different schemasADC

  12. REFERENCE • Mishra, S.N., Arif, W.,Mehedi, J.,Baishya, S., “A Power Efficient 6-Bit TIQ ADC Design for Portable Applications,” Consumer Electronics ?? Berlin ICCEBerlin2013. 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。

  13. THANK YOU END

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