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Synthesis of a Biquadratic Transadmittance Filter

雙二階轉導濾波器的合成

摘要


本篇論文使用了四種型態的電流式元件以避免不必要的端點,這四種型態的元件分別是:電流差分緩衝放大器(CDBA)、差動差分電流傳輸器(DDCC)、電流回授放大器(CFA)及第二代電流傳輸器(CCII),並且用他倆來合成一個新的雙二階轉導濾波器。其中,電路中的所有電容器和電阻器皆爲接地的狀態,因此,適合於IC的製作。此外,本電路還有高輸入/高輸出阻抗、較低的靈敏度等優點,並可經由被動元件值的大小來控制ω0和Q值。在本文所舉的例子中,主動元件皆以Hspice並套用0.5微米CMOS製程來模擬電路,由模擬無結果證明瞭理論與模擬值是相符的。

並列摘要


This paper focuses on a novel biquadratic filter using five kinds of current-mode active elements which are the current differencing buffered amplifier (CDBA), plus-type of differential difference current conveyor (DDCC+), current feedback amplifier (CFA) and plus-type and minus-type of second generation current conveyor (CCII±) to eliminate the redundant terminals. Furthermore it uses two capacitors and eight resistors. All capacitors and resistors in the circuit are grounded and suitable for integrated circuit implementation. The circuit of the proposed filter offers several advantages, such as high input and output impedances, low sensitivities to passive elements, and of use in controlling w0 and Q with the values of capacitors and resistors, respectively. An example is given. The active devices of the proposed circuit have been simulated by Hspice using 0.5μm CMOS technology.

並列關鍵字

CDBA DDCC+ CFA CCII± biquadratic filter current conveyors

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