標題: | 應用於人工電子耳之低功率金氧半帶通濾波器 Low-Power CMOS BandPass Filter for Application of Cochlear Prosthesis |
作者: | 黃禹華 Huang, Yu-Hua 洪崇智 Hung, Chung-Chih 電機學院電信學程 |
關鍵字: | 轉導電容式濾波器;低功率;低電壓;運算轉導放大器;可調式;弱反轉區;Gm-C filter;low power;low supply voltage;operational transconductance amplifier (OTA);tuning;weak-inversion region |
公開日期: | 2012 |
摘要: | 本論文提出一個應用於CMOS轉導電容式濾波器的低轉導運算放大器,濾波器具有低功耗與可調能力,可廣泛的應用於生物醫學領域。運算轉導放大器偏壓操作於弱反轉區,放大器轉導值大小可經由偏壓電流調整而改變。使用運算轉導放大器完成四階帶通電感電容梯型濾波器設計,並使用 TSMC 0.18-μm Mixed Signal 1P6M CMOS 製程完成晶片製作,將轉導電容式濾波器操作在0.65伏特的供應電壓時,可得到最低的功率消耗,在1伏特的操作電壓下,當輸入信號為300 Hz 峰對峰值電壓為0.1伏特,第一顆IC濾波器整體的功率消耗為225nW,總諧波失真為-48.58 dB,第二顆IC濾波器整體的功率消耗為61nW,總諧波失真為-50.23 dB,晶片面積皆為0.04mm2。 In this thesis, a CMOS Gm-C filter based on operational transconductance amplifiers (OTAs) with low power and tuning ability for biomedical applications is proposed. The OTA works in the weak-inversion region. The transconductance can be tuned by changing its bias current. A Fourth-Order Butterworth LC ladder Gm-C bandpass filter implemented with the OTAs was fabricated by TSMC 0.18-μm Mixed Signal 1P6M CMOS process. The supply voltage of the OTA-C filter can be as low as 0.65V for minimum power. The power consumption of the first IC is 225nW for a sinusoidal input signal of 300 Hz 100 mVPP with 1V supply voltage. Its Total Harmonic Distortion (THD) is -48.58 dB. The power consumption of the second IC is 61nW for a sinusoidal input signal of 300 Hz 100 mVPP with 1V supply voltage. The THD is -50.23 dB. They both have the same active area of 0.04mm2. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT070060708 http://hdl.handle.net/11536/71980 |
顯示於類別: | 畢業論文 |