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研究生:羅濟釧
研究生(外文):Chi-Chuan Luo
論文名稱:高增益高頻寬轉導放大器之偏壓電路設計
論文名稱(外文):The Bias Circuit Design of High Gain High Frequency OTA
指導教授:高家雄
指導教授(外文):Chia-Hsiung Kao
學位類別:碩士
校院名稱:國立中山大學
系所名稱:電機工程學系研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2008
畢業學年度:96
語文別:英文
論文頁數:45
中文關鍵詞:轉導放大器偏壓電路無電容前饋補償共模回授
外文關鍵詞:no-capacitor feed-forward(NCFF) compensationoperational transconductance amplifiers(OTA)bias circuitcommon mode feedback
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本論文我們使用無米勒電容補償模型並運用前饋級電路來獲得高增益與高頻率特性。我們使用共模回授電路去調整共模輸出位準與偏壓電流。此共模回授電路能使輸出的準位更精確的在參考電壓。
在本研究中使用 TSMC 0.35μm CMOS製程製作晶片。電壓增益大約在90dB,頻率大約在1GHz,供應電壓為±1.25V。電壓輸出位置小於10mV以內。
In this thesis, we use the no-capacitor feed-forward (NCFF) compensation scheme which employs a feed-forward path to obtain high gain, high frequency. We use CMFB circuit to adjust the common-mode output voltages and the bias circuit. The CMFB circuit makes the output accurately to the reference voltage.
The circuit was designed and fabricated TSMC 0.35 μm CMOS process. The dc gain is around 90dB and the cut-off frequency is 1GHz. The supply voltage is ±1.25V. The output voltage is smaller than 10mV.
Chapter 1 Introduction……………………………………………………………………1
1.1 Background……………………………………………………………………1
1.2 Motivation……………………………………………………………………3
1.3 Thesis Organization…………………………………………………………4

Chapter 2 Previous NCFF Compensation Scheme and CMFB Design …………………5
2.1 High Frequency Compensation Scheme………………………………………5
2.2 The NCFF Compensation Scheme Method……………………………………8
2.3 Previous Common Mode Feedback Circuit…………………………………9

Chapter 3 The Proposed High Gain High Frequency OTA Scheme……………………13
3.1 The Structure of Proposed High Gain High Frequency OTA…………………13
3.1.1 The Block Diagram of Basic Scheme OTA……………………………13
3.1.2 The Open Loop DC Gain………………………………………………14


3.2 The Common Mode Feedback Circuit Design………………………………16
3.2.1 The CMFB Circuit for Vo1 and Vo2……………………………………16
3.2.2 Vb1 and Vb2 Bias Circuit………………………………………………18
3.3 The Bias Circuit for Vb3………………………………………………………20
3.4 The CMFB Circuit for Vout1 and Vout2…………………………………………22
3.5 The Completely Structure of Proposed OTA Circuit…………………………23
3.5.1 The Completely Component Values of Proposed OTA Circuit……………………24

Chapter 4 Simulation and Measurement Result…………………………………………26
4.1 Simulation Result……………………………………………………26
4.1.1 OTA Frequency Response Comparison………………………………26
4.1.2 OTA DC Bias Comparison………………………28
4.2 Measurement Result and Layout……………………………………………29
4.2.1 Chip Features and Layout……………………………………………29
4.2.2 Measurement Result…………………………………………………31

Chapter 5 Conclusion……………………………………………………………………34
References………………………………………………………………………………35
[1] K. Bult, J.G.M. Geelen “A fast settling CMOS OpAmpfor SC circuits with 90dB DC gain” IEEE Journal of Solid-State Circuits, vol. 25, pp. 1379-1384. Dec. 1990.
[2] J. Silva-Martinez, F. Carreto-Castro “Improving the High-Frequency Response
of the Folded-Cascode Amplifiers” IEEE International Symposium on Circuits and Systems
, vol. 1, pp. 500-503, May. 1996.
[3] B.K. Thandris, J. Silva-Martinez, F. Maloberti “A Feedforward Compensation Scheme for High Gain Wideband amplifiers” IEEE International Conference on Electronics, Circuits and Systems, vol. 3, pp. 1115-1118, Sept. 2001.
[4] M.M. Ahmadi “A Novel Modelling and Optimisation of Gain-Boosted Cascode Amplifiers for High Speed Applications” IEEE International Conference on Electronics, Circuits and Systems, vol. 2, pp. 683-686, Dec. 2003.
[5] J. Silva-Martinez, J. Adut, M. Rocha-Perez “A 58dB SNR 61th Order Broadband 10.7 MHz SC Ladder Filter” IEEE Conference on Custom Integrated Circuits, pp. 13-16 , Sept. 2003.
[6] B.K. Thandri, J. Silva-Martinez “A Robust Feedforward Compensation Scheme For Multi-Stage Operational Transconductance Amplifiers with No Miller Capacitors” IEEE Journal of Solid-State Circuits, vol. 38, pp 237-243, Feb. 2003.
[7] B. K. Thandri, J. Silva-Martinez, M. J. Rocha-Perez, and J. Wang “A 92MHz, 80dB Peak SNR SC Bandpass Data-Sigma Modulator Based on a High GBW OTA with No Miller Capacitors in 0.35um CMOS technology” IEEE Conference on Custom Integrated Circuits
, pp. 123-126, Sep. 2003.
[8] G. Olvera-Romero, J. Silva-Martinez “A folded-cascode OTA for high-frequency applications based on complementary differential pairs” IEEE International Workshop on Mixed-Mode Integrated Circuits and Applications, pp. 57-60, July 1999.
[9] B.K. Thandri, J. Silva-Martinez “An Overview of Feed-Forward Design Techniques for High-Gain Wideband Operational Transconductance Amplifiers” Microelectronics Journal, vol. 37, pp 1018-1029, April 2006.
[10] B. Razavi, Design of Analog CMOS Integrated Circuits, McGraw-Hill,
pp. 314-321, 2005.
[11] R.J. Baker, COMS Circuit Design, Layout, and Simulation, Wiley-Interscience, pp.836-837, 2005.
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