- 學位論文
使用運算轉導放大器設計混合模式主動濾波器
Design of Mixed-Mode Active Filter Using Operational Transconductance Amplifiers
摘要
以電流式主動元件，所設計之電路，具有較高之頻寬、較大之動態及線性範圍、較小之功率損耗及較簡單之結構，故利用電流式主動元件來設計高品質的類比電路，已成為廣泛的應用。 由於運算轉導放大器可藉由一偏壓電流改變其內部轉導值，所以在設計電路時，無須外加電阻器及考慮電阻器接地的問題，並且其具有輸入阻抗大輸出電流為零、輸出阻抗大及可取代電阻使用等優點，故以運算轉導放大器來設計各種主動電路非常普遍，尤其是只使用運算轉導放大器及電容器的方式，完全不需使用電阻器即可完成濾波器的設計。 因為運算轉導放大器具有上述眾多優良的特性，故本論文在混合模式主動濾波器的架構上，以其作為主動元件使用。 此電路採用台灣積體電路公司零點三五微米互補式金屬氧化物半導體製程與HSPICE模擬軟體，電源電壓為3V，用運算轉導放大器作為主動元件，設計出具有電壓模式和電流模式之廣義混合型二階濾波器電路。
並列摘要
The electronic circuit was designed by the current-mode active components that have higher bandwidth, large dynamic linear range, smaller power consumption and simple structure. So high-quality analog circuit was designed by the current-mode active components that has become widely application. Because operational transconductance amplifiers could changed value of internal transconductance by the bias current. So when we design the circuits, we don’t add the resistors or consider resistor grounding. And it has the advantages of large input impedance and zero output current and large output impedance and it could replace the use of the resistors. So various active circuits was designed by the operation transconductance amplifiers that is very common. Especially if it only used operational transconductance amplifiers and capacitor that didn’t use the resistor and it could complete the design of filter. Because the operational transconductance amplifiers have above excellent features, in the frame of mixed-mode active filter, this thesis used the operational transconductance amplifiers as the active components. The circuit used TSMC 0.35μm CMOS process and simulated with HSPICE, the power supply voltage of 3V, with operational transconductance amplifiers as the active components, that designed a voltage-mode and current-mode of the generalized mixed-mode biquad filter circuit.