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  • 學位論文

以DVCC為基礎的振盪器

The Design of DVCC-based Oscillators

指導教授 : 侯俊禮
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摘要


摘 要   本篇論文主要探討的是差動電壓電流傳輸器的一些應用,包括振盪器的實現與其和運算轉導放大器的轉換關係。 在本論文首先提出的電路是以差動電壓電流傳輸器為主動元件,再搭配接地的電容器以及電阻器以合成振盪器。在設計的過程中,一方面利用信號流程圖的觀念,以來推導的方式驗證電路理論的正確性,另一方面透過HSPICE的模擬結果以凸顯電路在UMC 0.5 2P2M的製程參數下所可能呈現的電路表現。其模擬的振盪頻率分別為4KHz、4.2KHz與理論值相差2%,而總諧波失真分別為3.7663%以及4.2183%。 此外,本篇論文提出一個以運算轉導放大器轉換成差動電壓電流傳輸器為架構之電路轉換法,並以一個濾波器的模擬結果來證明所提出轉換關係。

並列摘要


Abstract This thesis mainly discusses some applications of the differential voltage current conveyor; including the realization of oscillators and its transfer relationship with OTAs. In this thesis, the first two circuits we present employing differential voltage current conveyors as active elements with grounded capacitors and resistors to synthesize oscillators. During design progress, on one hand, we apply the concept of signal flow graph to verify the correctness of the circuit theory; on the other hand, we use the simulation results from HSPICE to show the possible performances of the circuits under UMC 0.5μm 2P2M process parameters. The simulated oscillation frequencies are 4KHz and 4.2KHz,and have an error about 2% of the ideal values, and the total harmonic distortions are 3.7663% and 4.2183%, respectively. Moreover, this thesis presents a transformation to transfer OTAs into differential voltage current conveyors and the simulation results of a filter are performed to demonstrate the transformation.

參考文獻


[1] B. Wilson, “Constant bandwidth voltage amplification using current conveyor,” International Journal of Electronics, vol. 65, no. 5, pp. 983-988, 1988.
[4] K. C. Smith, and A. Sedra, “The current conveyor-a new circuit building block,”IEEE Proc., vol.65, no.5, pp. 1368-1369, 1968.
[5] A. Sedra, G. W. Roberts, and F. Gohh, “The current conveyor:history, process and new results,” IEE Proc., Vol.137, no.2, pp.78-87, 1990.
[6] K. C. Smith and A. Sedra, “A second-generation current conveyor and it’s applications ,” IEEE Trans.,CT-17, pp. 132-134, 1970.
[7] U.Cam, A. Toker, and H. Kuntman,” CMOS FTFN realization based on translinear cells,” Electronics Letters, Vol.36, no.15, pp1255-1256, 2000.

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