四階帶通／帶拒橢圓濾波器靈敏度分析

Sensitivity Analysis of Fourth-Order Band-Pass/Band-Reject Elliptic Filter

陳福琦(Fu-Chi Chen)

橢圓濾波器 ； 電流式 ； 運算轉導放大器、主動濾波器 ； 帶通濾波器 ； 帶拒濾波器 ； Elliptic filter ； Current-mode ； Operational transconductance amplifiers (OTAs) ； Active filter ； Band-pass (BP) ； Band-reject (BR)

明新學報

41卷1期（2015 / 02 / 01）

15 - 22

繁體中文

在研究類比電路中而所提出電流式的四階帶通∕帶拒之柯爾橢圓濾波器，主要結構為只使用六個運算轉導放大器（OTA）與四個電容器所組成的電路，有較少之主動被動元件，其主要特色為皆用單端輸入的OTA與一端接地之電容的架構，可吸收降低OTA-C的寄生效應，且電路簡單，每個節點之分支數較少，在積體電路製程中可降低製程的面積。此篇論文中包含電路之描述、靈敏度性能之分析與使用0.35微米製程之H-Spice軟體模擬結果來印證理論的分析。

Band-pass and band-reject elliptic filter has a better cut-off rate specification (namely a narrower transition band), but a complicated design procedure. The continuous-time analog filters are useful circuit blocks in modern microelectronic applications, such as control systems and communication systems. This study proposes a current-mode fourth-order elliptic Cauer filter employing only six operational transconductance amplifiers (OTAs) and four capacitors. This elliptic filter structure has less number of active and passive components, and the OTAs all single-ended-input and capacitors all grounded, thus can absorb and minimize the OTA-C parasitic effects. It is concluded that the simple circuit described, low sensitivity analysis and H-Spice simulation results of TSMC 0.35μm process.

1. Bhushan, M.,Newcomb, R.(1967).Grounding of capacitors in integrated circuits.Electronics Letters,3(4),148-149.
2. Chang, C. M.,Swamy, M. N. S.(2013).Analytical synthesis of odd/even-nth-order elliptic Cauer filter structures using OTRAs.International Journal of Circuit Theory and Applications,41(12),1248-1271.
3. Deliyannis, T.,Sun, Y.,Fidler, J. K.(1998).Continuous-Time Active Filter Design.U.S.A.:CRC Press.
4. Horng, J. W.,Hsu, C. H.,Tseng, C. Y.(2012).High input impedance voltage-mode universal biquadratic filters with three inputs using three CCs and grounding capacitors.Radioengineering,21(1),290-296.
5. Koziel, S.,Szczepanski, S.,Schaumann, R.(2004).Structure generation and performance comparison of elliptic Gm-C filters.International Journal of Circuit Theory and Applications,32(6),565-589.
6. Koziel, S.,Szczepanski, S.,Schaumann, R.(2003).A general approach to continuous-time Gm-C filters.International Journal of Circuit Theory and Applications,31(4),361-383.
7. Laber, C.,Gray, P.(1993).A 20-MHz sixth-order BiCMOS parasitic-insensitive continuous-time filter and second-order equalizer optimized for disk-drive read channels.Solid-State Circuits, IEEE Journal of,28(4),462-470.
8. Schaumann, R.,Van Valkenburg, M. E.(2001).Design of analog filters.New York:Oxford University Press.
9. Shu-Hui, T.,Chun-Ming, C.,Ross, J. N.,Swamy, M. N. S.(2007).Analytical Synthesis of Current-Mode High-Order Single-Ended-Input OTA and Equal-Capacitor Elliptic Filter Structures With the Minimum Number of Components.Circuits and Systems I: Regular Papers, IEEE Transactions on,54(10),2195-2210.
10. Sun, Y.,Fidler, J. K.(1996).Synthesis and performance analysis of universal minimum component integrator-based IFLF OTA-grounded capacitor filter.Circuits, Devices and Systems, IEE Proceedings,143(2),107-114.
11. Szczepanski, S.,Wyszynski, A.,Schaumann, R.(1993).Highly linear voltage-controlled CMOS transconductors.Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on,40(4),258-262.
12. Yichuang, S.,Fidler, J. K.(1997).Structure generation and design of multiple loop feedback OTA-grounded capacitor filters.Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on,44(1),1-11.