以電流式主動元件設計之波型產生器

一般類比電路大多是以電壓方式(voltage mode)來處理信號，而電壓式運算放大器(Operational Amplifier；OP Amp.)因為價格低廉且技術穩定，使得電壓式運算放大器被一般電路設計者廣泛使用，但是電壓式電路受限於增益頻寬積(GBP)為定值且回轉率(slew rate)不夠高，使得電路設計者在處理高頻訊號時受到了許多限制。電流式主動元件在最近幾年來受到許多學者及電路設計者的喜愛，因為電流式電路的優越性已被證實，它們具有較大的頻寬及增益、較大的動態範圍、較精確的結果、較低的功率損耗以及較小的晶片面積的電路結構等優點。本論文主要是應用現成的第二代電流傳輸器(Second-Generation Current Conveyer II；CCII) 做成的積分器(Integrator)電路和第二代電流控制傳輸器(Second-Generation Current Controlled Conveyer；CCCII)做成的開關(Switch)電路，而提出兩個不同的應用；(1)三角波產生器(Triangle-wave Generator)，(2)階梯波產生器(Staircase-wave Generator)，這兩者電路的好處就是比用運算放大器(Operational Amplifier；OP)所做的類似功能電路速率快，並在最後我們從模擬結果證明本論文所提之電路可行性。

關鍵字

開關；階梯波產生器；三角波產生器；積分器；電流傳輸器

並列摘要

In general, the analog circuit handles the voltage-mode signals and the voltage-mode Operational Amplifier because the price is cheap and the technique stabilize, Therefore the voltage-mode Operational Amplifier is used extensively in general electronic circuit design, but the voltage-mode electronic circuit be been limited by the gain bandwidth product to accumulate for the constant and the slew rate not enough higher to make the electronic circuit design be subjected to many restrictions while handling the high frequency signal. In recent years, the current-mode active component is popular in scholastic discussion and circuit designer usage Current-mode active components have the advantages of wider bandwidths, larger dynamic ranges, lower power consumption, smaller areas and easier to design. In this thesis, the object of this study proposed two applications of an integrator using a second-generation current conveyer and a switch using a second-generation current controlled conveyer: (1) Triangle-wave generator, (2) Staircase-wave generator, both of them has higher speed than those using an operational amplifier. The simulation results are given to demonstrate the feasibility of the proposed circuits.

並列關鍵字

Triangle-wave Generator ； Current Conveyer ； Staircase-wave Generator ； Switch ； Integrator

參考文獻

[1] K. C. Smith and A. Sedra, “The current conveyor- a new circuit building block”, IEEE Proc, vol.56, pp1368-1369, 1968.

[2] J. A. Svoboda, “Comparison of RC op-amp. And RC current conveyor filters”, Int. J. Electronics, vol. 76, no. 4 , pp615-626, 1994.

[3] A. Sedra and K. C. Smith, “A second-generation current conveyor and its applications”, IEEE Trans on Circuit Theory, CT-17, pp. 132-134, 1970.

[4] A. Fabre, O. Saaid, F. Wiest and C. Boucheron, “Current controlled bandpass filter based on translinear conveyor”, Electron. Lett.,31,20, pp.1727-1728, 1995

[5] Shen-Iuan Liu, Hen-Wai Tsao, Jingshown Wu, and Tung-Kwan Lin, “MOSFET-Capacitor Filters Using Unity-Gain CMOS Current Conveyors”, Electronics Letters, vol. 26, pp. 1430-1431, 1990.

國際替代計量

以電流式主動元件設計之波型產生器

全文下載

主題瀏覽