臺灣博碩士論文加值系統

我們使用TSMC 0.35μm 2p4m CMOS製程技術完成新架構低電壓低功率切換式功率放大器的設計，其所需要的供應電壓為1.5伏特，並且所設計的電路能應用在助聽器裡。

模擬結果顯示這個新架構的電路可以達到0.094％的THD和79.6％功率效率。此結果表示我們的電路在THD和功率效率表現良好，並且適合於低電壓低功率的設計。

A low voltage and low power switch mode power amplifier is proposed. It is designed using TSMC 0.35μm 2p4m CMOS process technology. It can be applied to hearing aids, and the supply voltage is 1.5V.

Experimental results show that the proposed amplifier has the total harmonic distortion (THD) of 0.094% and power efficiency around 79.6%. The proposed power amplifier has superior performance in THD and power efficiency, and it is suitable for low-power low-voltage applications.

Chapter 1 Introduction
1.1 The Fundamentals of Power Amplifier
1.1.1 Harmonic Distortion
1.1.2 Power Efficiency

Chapter 2 Traditional power amplifier
2.1 Linear Classes of Power Amplifier
2.1.1 Class A
2.1.2 Class B
2.1.3 Class AB
2.2 Nonlinear Classes of Power Amplifier
2.2.1 Class D
2.2.2 Class K
2.3 Summary of Power Amplifiers

Chapter 3 The proposed low voltage and low power
consumption power amplifier
3.1 The Proposed Power Amplifier
3.1.1 Basic Theorem
3.1.2 Pseudo Differential Amplifier
3.1.3 Schmitt trigger
3.1.4 Low Pass Filter (Bridge)
3.1.5 Switching Frequency

Chapter 4 Simulation Results and Conclusion
4.1 THD Simulation Results
4.2 The Power Efficiency Simulation Results
4.3 The Switching Frequency
4.4 Comparisons
4.5 Conclusion

References

[1] Tan M.T., Chang J.S. and Tong Y.C.,〝 A novel self-tuning pulse width modulator based on master-slave architecture for a Class D amplifier 〞, IEEE Circuits and Systems, vol.2,pp.164-167, 1999.
[2] Nam-Sung Jung, Nam-In Kim and Gyu-Hyeong Cho, 〝 A new high-efficiency and super-fidelity analog audio amplifier with the aid of digital switching amplifier: class K amplifier 〞, Power Electronics Specialists Conference, vol.1,pp.17-22, 1998.
[3] van der Zee, R.A.R., van Tuijl and E.A.J.M., 〝 A power-efficient audio amplifier combining switching and linear techniques 〞, IEEE Solid-State Circuit, vol.34,pp.985-991, 1999.
[4] Meng-Tong Tan, Hock-Chuan Chua, Bah-Hwee Gwee, Chang and J.S., 〝 An investigation on the parameters affecting total harmonic distortion in class D amplifiers 〞, IEEE Circuits and Systems, vol.4,pp.193-196, 2000.
[5] Chang, J.S., Bah Hwee 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 Circuits and Systems, vol.1,pp.635-638, 2001.
[6] Ginart, A.E., Bass R.M., Leach W.M. Jr. and Habetler T.G., 〝 Analysis of the class AD audio amplifier including hysteresis effects 〞, IEEE Power Electronics, vol.18,pp.679-685, 2003.
[7] Soo-Chang Choi, Jun-Woo Lee, Woo-Kang Jin, Jae-Hwan So and Suki Kim, 〝 A design of a 10-W single-chip class D audio amplifier with very high efficiency using CMOS technology 〞, IEEE Consumer Electronics, vol.45,pp.465-473, 1999.
[8] Dallas Maxim, 〝 Class D audio amplifier output filter optimization ”, www. maxim-ic.com/an624,Apr
[9] M.C.Killion and G.Village, 〝 Class D hearing aid amp 〞, US Patent No.4,689,819,1987.
[10] Chang, J.S., Meng-Tong Tan, Zhihong Cheng and Yit-Chow Tong, 〝 Analysis and design of power efficient class D amplifier output stages 〞, IEEE Circuits and Systems I, vol.47,pp.897-902, 2000.
[11] Dapkus D., 〝 Class-D audio power amplifiers: an overview 〞, IEEE Consumer Electronics,pp.400 – 401, 2000.