標題: | A wide tuning range G(m)-C continuous-time analog filter |
作者: | Lo, Tien-Yu Hung, Chung-Chih 電信工程研究所 Institute of Communications Engineering |
關鍵字: | G(m)-C filters;low power;operational transconductance amplifier (OTA);strong inversion region;tuning;weak inversion region |
公開日期: | 1-四月-2007 |
摘要: | A CMOS operational transconductance amplifier (OTA) for low-power and wide tuning range filter application is proposed in this paper. The OTA can work from the weak inversion region to the strong inversion region to maximize the transconductance tuning range. The transconductance can be tuned by changing its bias current. A fifth-order Elliptic low-pass filter implemented with the OTAs was integrated by TSMC 0.18-mu m CMOS process. The filter can operate with the cutoff frequency of 250 Hz to 1 MHz. The wide tuning range filter would be suitable for multi-mode applications, especially under the consideration of saving chip areas. The third-order inter-modulation (IM3) of -40 dB was measured over the tuning range with two tone input signals. The power consumption is 0.8 mW at 1-MHz cutoff frequency and 1.8-V supply voltage with the active area less than 0.3 mm(2). |
URI: | http://dx.doi.org/10.1109/TCSI.2007.890614 http://hdl.handle.net/11536/10948 |
ISSN: | 1549-8328 |
DOI: | 10.1109/TCSI.2007.890614 |
期刊: | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS |
Volume: | 54 |
Issue: | 4 |
起始頁: | 713 |
結束頁: | 722 |
顯示於類別: | 期刊論文 |