本篇論文的目標，在研究開關模式輔助之線性功率放大器並且實際驗證實體電路。開關模式輔助之線性放大器的架構，是由類比線性放大器（如AB類放大器）和數位開關放大器（如D類放大器），兩大技術所結合而成。結合的想法主要是為了研發出一個具有低失真且高功率增益的放大電路。
論文首先闡述開關模式輔助之線性放大器的重要理論。例如，遲滯效應分析、電感值分析和開關頻率分析等。接著探討總諧波失真及功率增益對電路系統參數的影響為其主要細節，然後藉由數學軟體Matlab7.0和電路模擬軟體PSpice來進行驗證和模擬比較。此外，針對訊號失真的改善，提出了單一感應電阻和多重感應電阻兩種架構，並且以PCB實際完成電路操作和量測。
最後，使用TSMC0.35 製程技術來設計出一個AB/D類音頻功率放大器。其電路量測由LT374示波器和3585A頻譜分析儀來完成，並且比較其量測結果和模擬結果。

The purpose of this thesis is to develop a switch-mode assisted linear power amplifier and demonstrate its performance. The switch-mode assisted linear amplifier topology combines current analog (Class AB) and switching (Class D) amplifier technology into one circuit. The idea behind this combination is to develop an amplifier which has high fidelity while maintaining a high efficiency.
After discussing some important theoretical considerations such as the hysteresis effects and the switching frequency, the relation between the THD, power efficiency and the system parameters is described. Following this, the result of the Matlab7.0 simulations compared with PSpice simulations is presented. In addition, aiming at the improvement of signal distortion, the one sensing resister and multiple sensing resisters technology are proposed and implemented by PCB (Printed circuit board). Finally, the class AB/D audio power amplifier are designed and simulated by TSMC 0.35 2P4M (Mixed-Signal) process. The measurements of the circuit ware achieved by LT374 Waverunner and 3585A Spectrum Analyzer, and the comparison with the simulation is discussed.

[1] A. S. Sedra and K.C.Smith, “Microelectronic Circuits”, Saunders College, Third
edition, 1991.
[2] J. M. D. Murphy and F. G. Turnbull , “ Power Electronic Control of AC Motor ”
, Pergamon Press, 1988.
[3] MOHAN , UNDELAND , ROBBINS, ” POWER ELECTRONICS：Converters,
Applications and Design ”, WILEY, 1989.
[4] W. Marshall Leach, Jr. , “ The Class-D Amplifier ”, From the book Introduction to
Electroacoustics and Audio Amplifier, publish by Kendall/Hunt, 2001.
[5] Chiew Tiam Boon , “ Switch Mode Multilevel ( Class D ) Power Amplifier ”,
Department of Electrical and Computer Engineering The University ofQueensland, October 2001.
[6] Don Dapkus and Robin Chen ,“ Utilizing Class-D audio power amplifier for high
efficiency”,TEXAS INSTRUMENTS, TPA005D02 Class D Stereo Audio Power
Amplifier Evaluation Module, User’s Guide, 1998.
[7] T. Sowlati, C. Andre, T. Salama, J. Sitch, G. Rabjohn and D.Simth,“ Low Voltage
High Efficiency Class-E GaAs Power Amplifiers For Mobile Communications ”,
IEEE GaAs IC Symposium , pp171~174, Oct. 1994.
[8] Changsik Yoo , and Qiuting Huang , “ A Common-gate switched , 0.9W Class-E
Power Amplifier with 41% PAE in 0.25um CMOS”, IEEE Journal of Solid-State
Circuits, Vol.36, pp.56~57, May. 2001.
[9] Chien C., Homg Tzyy Sheng , ” Design and Implementation of High-Efficiency
2.4GH Class-E Power Amplifier MMICs and Modules ” , National Sun Yat-Sen
University, 2000.
[10] Aoki , N. Asano , “ Improved Output Spectrum of Linearized Class-F Power
Amplifier For Digital Cellular Mobile Communication”, IEEE MTT-S Digest,
pp801~805,1998.
[11] G. B. Yundt, “Series or parallel-connected composite amplifier”, IEEE Trans. Power Electron, vol. PE-1, pp.48 ~54, Jan. 1986.
[12] Walker, G.R, “A Class B switch-mode assisted linear amplifier”, IEEE Trans. Power Electron, vol. 18, No. 6, November 2003.
[13] Jae Hoon Jeong, Nam Sung Jung, Gyu Hyeong Cho “A high efficiencyClass A Amplifier with Variable Power Supply”, 100th convention of theAudio Engineering Society, Copenhagen, Preprint #4257, May 1996.
[14] Harushige Nakagaki, Nobutaka Amada and Shigeki Inoue, "A High-Efficiency Audio Power Amplifier", J. Audio Eng. Soc., Vol. 31, No. 6,pp. 430-6, June 1983.

[15] M. Otala “Transient distortion in transistorized audio power amplifiers”
IEEE Trans. Audio Electroacoust., Vol. AU-18, pp. 234-9, Sept. 1970.
[16] Shuanghe Zhu and Caizhang Lin, “Reducing Distortion of Class-D(PWM)
Power Amplifier by Using Feed-Forward Technique”,IEEE, pp.630~633, 2000.
[17] Joseph S. Chang , B. H. Gwee , Yong Seng Lon and Meng Tong Tan , “ A Novel Low Power Low-Voltage Class-D Amplifier with Feedback for Improving THD
Power Efficiency and Gain Linearity”,IEEE Circuit and Systems,Vol.1,PP.635~
~638 ,2001.
[18] Vanderkoog J. and Lipshitz , S. P , “ Feed-forward Error-correction In Power
Amplifier ”, J.Audio Eng.Soc, no.28,pp.2~16, 1980.
[19] Zhu , S. H. and Ren , T.L. , “ Late-model Feed-forward Switched Power Supply
with Low Ripple ”, IEEE , Lett. , no.33 , pp.169~172, 1996.
[20] David K. Cheng, “Field and Wave Electromagnetics”, Saunders College, Second
Edition, 1989.
[21] Fan You; Embabi, S.H.K.; Sinencio, E.S ‚ “A 1.5 V class AB output buffer” Low Power Electronics and Design,1996.,International Symposium on 12-14 Aug. 1996 Page(s):285 – 288.
[22] P. E. Allen and D. R. Holberg, “CMOS Analog Circuit Design,” Holt, Rinehart and Winston, 1987, New York.
[23] R. J. Baker, Harry W. Li, David E. Boyce, “CMOS Circuit Design, Layout, and
Simulation” , WILEY-INTERS CIENCE, 1998.
[24]David A. Johns, Ken Martin, “ANALOG INTEGRATED CIRCUIT DESIGN,” University of Toronto, 1997.