標題: Multimode G(m)-C channel selection filter for mobile applications in 1-V supply voltage
作者: Lo, Tien-Yu
Hung, Chung-Chih
電信工程研究所
Institute of Communications Engineering
關鍵字: channel-selection filter;linear current multiplier;low voltage;mobile application;transconductor;wide tuning range
公開日期: 1-Apr-2008
摘要: A CMOS transconductor for multimode channel selection filter is presented. The transconductor includes a voltage-to-current converter and a current multiplier. Voltage-to-current conversion employs linear region MOS transistors, and the conversion features high linearity over a wide input swing range. The current multiplier which operates in the weak inversion region provides a wide transconductance tuning range without degrading the linearity. A third-order Butter-worth low-pass filter implemented. with the transconductors was designed by TSMC 0.18-mu m CMOS process. The measurement results show that the filter can operate with the cutoff frequency of 135 kHz to 2.2 MHz. The tuning range and the linearity performance would be suitable for the wireless specifications of GSM, Bluetooth, cdma2000, and wide-band CDMA. In the design, the maximum power consumption at the highest cutoff frequency is 2 mW under a 1-V supply voltage.
URI: http://dx.doi.org/10.1109/TCSII.2008.919513
http://hdl.handle.net/11536/9486
ISSN: 1549-7747
DOI: 10.1109/TCSII.2008.919513
期刊: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
Volume: 55
Issue: 4
起始頁: 314
結束頁: 318
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