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

Author

Yu, Gwo-Jeng ; Chen, Jenn-Jiun ; Lin, Heng-Yao ; Liu, Bin-Da ; Huang, Chun-Yueh

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

fYear

2003

fDate

2003

Firstpage

219

Lastpage

222

Abstract

In this paper, a log domain band-pass filter based on the MOSFET square law is proposed. This approach demonstrates that the center frequency ω₀ 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 μm 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.

Keywords

CMOS integrated circuits; band-pass filters; capacitors; current mirrors; low-power electronics; 0.25 micron; 2.5 V; CMOS technology; MOSFET square law; band pass log filter; capacitors; center frequency; complementary metal oxide semiconductor; current mirrors; log domain band pass filter; megahertz frequencies; metal oxide semiconductor field effect transistor; tunability; voltage current-mode square-root circuit blocks; Band pass filters; CMOS technology; Capacitors; Frequency measurement; MOSFET circuits; Mirrors; Power measurement; Power supplies; Tunable circuits and devices; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Technology, Systems, and Applications, 2003 International Symposium on

ISSN

1524-766X

Print_ISBN

0-7803-7765-6

Type

conf

DOI

10.1109/VTSA.2003.1252592

Filename

1252592