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論文名稱 Title |
低電壓低功率寬頻帶調變通道選擇濾波器 A Low-Voltage Low-Power Widely Tunable Channel Select Filter |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
67 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2006-06-28 |
繳交日期 Date of Submission |
2006-07-06 |
關鍵字 Keywords |
低功率、低電壓、濾波器、可調變、轉導 low voltage, low power, channel selection filter, OTA |
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統計 Statistics |
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中文摘要 |
本論文介紹一低供應電壓低功率可調變頻寬的四階Butterworth 低 通通道選擇濾波器,利用 OTA-C 濾波器架構組成而使用的製程是 TSMC 0.35μm 2P4M CMOS 技術。在轉導工作放大器 (operation transconductance amplifier : OTA) 方面,我們使用 Active-Cascode Triode OTA 的架構,利用偏壓於三極體區的輸入電晶體對使它的轉導值擁有一非常寬的調變範圍,而此 OTA-C 通道選擇濾波器可程式化從 0.5 到12MHz 兩種不同的射頻間距。另外再設計一個可減少輸入電晶體汲極電流的電路來抑制當轉導放大器操作於高轉導值時所產生的過大電流,如此可有效降低濾波器電路的總功率損耗,並將整體損耗功率抑制在 3mW 以下。 |
Abstract |
In this thesis, we propose a low voltage low power wide-tuning 4th-order butterworth low-pass OTA-C channel selection filter. It is implemented by using TSMC 0.35μm 2P4M CMOS technology. The drain voltage of triode-biased input transistors of the OTA is regulated through an active-cascode loop for low power and wide-tuning range. The Gm-C channel selection filter can be programmed from 0.5 to 12MHz. The OTA also employs a circuit to reduce the OTA output current in a high transconductance mode and the total power consumption of filter is suppressed below 3mW. |
目次 Table of Contents |
Abstract Chapter 1 Introduction 1.1 Motivations 1.2 Thesis Outline Chapter 2 Triode-Biased CMOS OTAs 2.1 Widely Tunable Triode-Biased CMOS OTA 2.2 Previous Triode-Biased OTA 2.2.1 Cascode Triode-Biased OTA 2.2.2 Regulated-Cascode Triode-Biased OTA 2.3 Active-Cascode Triode-Biased OTA 2.3.1 Basic Theorem 2.3.2 Discussion 2.4 Previous Current Suppress Circuit 2.5 Summary Chapter 3 The Low-Power Widely Tunable CMOS OTA and its Application in Channel Selection Filter 3.1 The Proposed OTA 3.1.1 Basic of the Proposed OTA 3.1.2 The Fully Differential OTA with Common-Mode Feedback Circuit 3.2 4th-Order Low-Pass Channel Selection Filter 3.2.1 Basic Filter Theorem 3.2.2 Butterworth Low-Pass Filter 3.2.3 Active Butterworth OTA-C Low-Pass Filter Chapter 4 Simulation Results and Measured Results 4.1 Simulation Results 4.1.1 The Simulation Results of OTA 4.1.2 Simulation Results of the Widely Tunable Channel Selection Filter 4.2 Layouts and Measured Results Chapter 5 Conclusions and Future Work 5.1 Conclusions 5.2 Future Work Reference |
參考文獻 References |
[1] Hori S., Maeda T., Matsuno N., Hida H., Low-Power Widely Tunable Gm-C Filter with an Adaptive DC-Blocking, Triode-Biased MOSFET Transconductor. ESSCIRC, Solid-State Circuits Conference, Page(s) : 99 – 102, 2004. [2] Grebene A.B., Bipolar and MOS Analog Integrated Circuit Design. New York, NY : Wiley, 1984. [3] Sanchez-Sinencio E., Silva-Martinez J., CMOS Transconductance Amplifiers, Architectures and Active Filters: a Tutorial. IEE Proceedings, Circuits, Devices and Systems, Vol. 147, Page(s) : 3 – 12, 2000. [4] De Lima J.A., Serdijn W.A., A Compact nA/V Triode-Transconductor and its Application to Very-Low Frequency Filters. International Symposium, Circuits and Systems, ISCAS 2005, Page(s) : 1988 – 1991, Vol. 3, 2005. [5] Nauta B., Klumperink E., Kruiskamp W., A CMOS Triode Transconductor. IEEE International Symposium, Circuits and Systems, Page(s) : 2232 – 2235, 1991. [6] Kachare, M., Lopez-Martin, A.J., Rarnirez-Angulo, J., Carvajal, R.G., A Compact Tunable CMOS Transconductor with High Linearity. IEEE Trans, Circuits and Systems ΙΙ : Express Briefs, Page(s) : 82 – 84, Vol. 52, 2005. [7] Yodprasit, U., Enz, C.C., A 1.5-V 75-dB Dynamic Range Third-Order Gm-C Filter Integrated in a 0.18-μm Standard Digital CMOS Process. ESSCIRC, Solid-State Circuits Conference, Page(s) : 647 – 650, 2002. [8] Behzad Razavi, Design of Analog CMOS Integrated Circuits. McGRAW-Hill International Edition, 2001. [9] Zeki A., Low-Voltage CMOS Triode Transconductor with Wide-Range and Linear Tunability. Electron, Lett, Vol. 35, Page(s) : 1685 – 1686, 1999. [10] De Lima J.A., Dualibe C., A Linearly Tunable Low-Voltage CMOS Transconductor with Improved Common-Mode Stability and its Application to Gm-C Filters. IEEE Trans, Circuits and Systems ΙΙ, Vol. 48, Page(s) : 649 – 660, 2001. [11] Itakura T., Ueno T., Tanimoto H., Arai T., A 2 VPP Linear Input-Range Fully Balanced CMOS Transconductor and its Application to a 2.5V 2.5MHz Gm-C LPF. in Proc, IEEE Custom Integrated Circuits Conf, Page(s) : 509 – 512, 1999. [12] Sackinger E., Guggenbuhl W., A High-Swing, High-Impedance MOS Cascode Circuit. IEEE J, Solid-State Circuit, Vol. 25, Page(s) : 289 – 298, 1990. [13] Enz C.C., Krummenacher F., Vittoz E.A., An Analytical MOS Transistor Model Valid in All Regions of Operation and Dedicated to Low-Voltage and Low-Current Applications. Analog Integr, Circuits Signal Process, J, Vol. 8, Page(s) : 83 – 114, 1995. [14] Rolf Schaumann and Mac E. Van Valkenburg, Design of Analog Filters. New York, Oxford University Press, 2001 [15] Butterworth S., On the Theory of Filter Amplifier. Wireless Engineer, Vol. 7, Page(s) : 536 – 541, 1930. |
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