本篇論文是介紹不受溫度影響的偏流電路。以傳統的參考臨界電壓電路結合對溫度補償電阻的特性設計出，此電路可以在輸入電壓超過1.5V時正確的工作與啟動。如此，得到一個不隨工作電壓與環境溫度變化的參考電流源將會達成。

另外，本篇論文亦介紹一種穩定式負回授疊加電流鏡，此種電流鏡是利用電壓水準位移的方法達到穩定輸出的結果，此電流鏡由以下三種特性組成：高精準電流複製電路、穩定的高輸出阻抗及寬廣的輸入電壓擺幅。

Abstract

A novel implementation of temperature independent current reference is proposed in this thesis. Based on the traditional bandgap circuit, a current reference is realized by compensating the temperature performance of the resistor, which can start correctly and work properly with a power supply voltage above 1.5V. Thus, a current reference independent and power supply voltage variations is proposed.

A regulated feedback cascode current mirror is also proposed in this thesis. The current mirror is composed of the following three parts: the high accurate current matching circuit, the regulated high output resistance circuit and the wide voltage swing input circuit.

REFERENCE

[1] E. Fred Schubert, ‘Light-Emitting Diode’, CAMBERIDGE, second edition, pp. 332-335.
[2] E. Fred Schubert, ‘Light-Emitting Diode’, CAMBERIDGE, second edition, pp. 63-64.
[3] E. Fred Schubert, ‘Light-Emitting Diode’, CAMBERIDGE, second edition, pp. 102-104.
[4] Xi Y. and Schubert E. F. ‘Junction-temperature measurement in GaN ultraviolet light-emitting diodes using diode forward-voltage method’ Appl. Phys. Lett. 85, 2163 (2004)
[5] Xi Y., Xi J.-Q., Gessmann T., Shah J. M., Kim T. K., Schubert E.F., Fischer A. J., Crawford M. H., Bogart K. H. A., and Allerman A. A. ‘Junction temperature measurements in deep-UV light-emmitting diodes’ Appl. Phys. Lett. 86, 031907 (2005)
[6] Jiwei Chen and Bingxue Shi ‘1 V CMOS current reference with 50 ppm/"C temperature coefficient’, Electronic Letters 23rd January 2003 Vol. 39 No. 2
[7] Sansen, W.M., et al.: 'A CMOS temperature-compensated current reference', IEEE 1 Solid-state Circuits, 1988, 23, (3), pp. 821-824
[8] Oguey, H., and Aebischer, D.: 'CMOS current reference without resistance', IEEE J1 Solid-state Circuits, 1997, 32, (7), pp. 1132-1 135
[9] Lee, C.H., and Park, H.J.: 'All-CMOS temperature independent current reference', Electron. Letters., 1996, 32, (14), pp. 12861281
[10] Deval, Y., et al.: 'Ratiometric temperature stable current reference', Electron. Letters., 1993, 29, (14), pp. 1284-1285
[11] Esa Tiiliharju, Seyed Zarabadi, Mohammed Ismail, Kari Halonen, ‘A Very-High Impedabce, High-Swing Cascode Stage for Sub-Micron Analog VLSI’, Circuits Devices, July 1997, pp. 49-50.
[12] A. Zeki and H. Kuntman, ‘Accurate and high output impedance current mirror suitable for CMOS current output stages’ Electronics Letters 5th June 1997 Vol. 33 No. 12, pp.1042-1043.
[13] Z. Wang, ‘Analytical determination of output resistance and DC matching errors in MOS current mirrors’, IEE Proc. Vol. 137, NO. 5, 1990, pp. 397-404