A low-voltage low-power log-domain band-pass filter

In this paper, a log domain band-pass filter based on the MOSFET square law is proposed. This approach demonstrates that the center frequency /spl omega//sub 0/ of band-pass filter is not only attainable at megahertz frequencies but also tunable electronically. In addition, constructed by low-voltag...

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Bibliographic Details
Published in2003 International Symposium on VLSI Technology, Systems and Applications. Proceedings of Technical Papers. (IEEE Cat. No.03TH8672) pp. 219 - 222
Main Authors Gwo-Jeng Yu, Jenn-Jiun Chen, Heng-Yao Lin, Bin-Da Liu, Chun-Yueh Huang
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Band pass filters
Capacitors
CMOS technology
Frequency measurement
Mirrors
MOSFET circuits
Power measurement
Power supplies
Tunable circuits and devices
Voltage
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Summary:In this paper, a log domain band-pass filter based on the MOSFET square law is proposed. This approach demonstrates that the center frequency /spl omega//sub 0/ of band-pass filter is not only attainable at megahertz frequencies but also tunable electronically. In addition, constructed by low-voltage current-mode square-root circuit blocks, current mirrors and capacitors, the proposed band-pass log filter can be operated at 2.5 V supply voltage. The proposed circuit has been fabricated in 0.25 /spl mu/m CMOS technology, and the measured results show that the proposed circuit has the merits of high frequency operation, tunability, and low power supply voltage operation.
ISBN:0780377656
9780780377653
ISSN:1524-766X
2690-8174
DOI:10.1109/VTSA.2003.1252592