以互補式單端接地運算轉導放大器為主動元件所設計之萬用濾波電路結構Complimentary Single-Ended-Input OTA-C Universal Filter Structures

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/168,777

專利證號

US 8,461,917 B2

專利獲證名稱

以互補式單端接地運算轉導放大器為主動元件所設計之萬用濾波電路結構Complimentary Single-Ended-Input OTA-C Universal Filter Structures

專利所屬機關 (申請機關)

中原大學

獲證日期

2013/06/11

技術說明

本專利提出以互補式單端運算轉導放大器所設計的濾波電路有最精準的輸出響應最大的線性範圍及最大的動態範圍(當與經由兩個分析合成法及兩個轉換法得出的四個不同電路結構相比較時) 有關運算轉導放大器的轉導頻率響應也被擴大延伸改進 另外 研究結果說明一個六階的濾波電路 其靈敏度不一定比等效三個串接二階的電路有更高的靈敏度 所設計電路中的帶通濾波電路 帶拒濾波電路 及全通濾波電路均有非常低的靈敏度 Complementary single-ended-input operational transconductance amplifier (OTA)-based filter structures are introduced in this paper. Through two analytical synthesis methods and two transformations, four distinct kinds of voltage-mode nth-order OTA-C universal filter structures are proposed. TSMC H-Spice simulations validate that the new complementary singleended- input OTA-based one holds the superiority in output precision, dynamic and linear ranges than other kinds of filter structures. Both direct sixth-order universal filter structures and their equivalent three biquad stage ones are also simulated and validated that the former is not absolutely larger in sensitivity than the latter. Finally, a very sharp increment of the transconductance of an OTA is discovered as the operating frequency is very high and leads to a modified frequency-dependent transconductance.

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本部(收文號1050051935)同意該校105年7月20日原產字第1050002202號函終止維護專利20件(中原)

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