不具有運算放大器的帶差參考電路設計與製作

本論文旨在設計一個不具有運算放大器的CMOS帶差參考電路，並含有一個啟動電路。一般的帶差參考電壓電路，為了得到更好且更穩定的輸出電壓，通常會使用運算放大器，但是運算放大器本身存在著高補償電壓，往往使得電路的特性大打折扣，同時，運算放大器也佔用不小的晶片面積，無形中提高電路成本。為了避免運算放大器存在著補償電壓所產生的問題，並有效減少晶片的面積，本論文特別提出一個不使用運算放大器的帶差參考電壓電路，再加上啟動電路及穩定轉導的控制電路，不僅可以達到正負溫度係數相抵的功能，該參考電路兼具參考電壓與參考電流的輸出，同時提供與溫度變化無關的參考電壓與參考電流。

關鍵字

帶參考電路；運算放大器；正負溫度係數；穩定轉導電路；啟動電路

並列摘要

This thesis aims to design a CMOS bandgap voltage reference with a state-up circuit, but without using an operational amplifier. Typically, an operational amplifier was used in bandgap reference to have both great performance and stability. However, a disadvantage of high offset voltage degrades its performance, considerably moreover, an operational amplifier occupies more chip area. In order to overcome those problems, a CMOS bandgap reference without OPA was proposed in this paper, not only having good performance but also reducing the chip area. Furthermore, a start-up circuit and a gm-constant circus are used in the proposed bandgap reference, to realize a zero temperature coefficient, Notify that both temperature-independent voltage and current are provided simultaneously.

並列關鍵字

Bandgap reference ； gm-constant ； start-up circuit

參考文獻

[23] 呂侑祥,“液晶顯示器白光二極體之脈波寬度調變升壓晶片設計”,碩士論文國立台北科技大學電機工程研究所,2008

[2] Rober J. Widlar,“ An Exact Expression for the Thermal Variation of the Emitter Base Voltage of Bi-Polar Transistors,”Proc. IEEE (Letters), vol.55 , January 1967, pp.96-97.

[3] Joseph S. Brugler, “Silicon Transistor Biasing for Linear Collector Current Temperature Dependence,”IEEE J. Slid-State Circuits, vol. SC-2, June 1967, pp.57-58.

[4] Rober J. Widlar, New Developments in IC Voltage Regulators,”IEEE J. Solid-State Circuits, vol. SC-6, February 1971, pp.2-7.

[5] Karel E. Kuijk,“A Precision Reference Voltage Source,”IEEE J. Solid-State Circuits, vol. SC-8, June 1973, pp.222-226.

國際替代計量

不具有運算放大器的帶差參考電路設計與製作

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