Design of log domain low-pass filters by MOSFET square law

Author

Yu, Gwo-Jeng ; Liu, Bin-Da ; Hsu, Yuan Chia ; Huang, Chun-Yueh

Author_Institution

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

fYear

2000

fDate

2000

Firstpage

9

Lastpage

12

Abstract

In this paper, the log domain low-pass filter based on the MOSFET square law is proposed. This approach demonstrates that the cutoff frequency of the low-pass filter is not only attainable at megahertz frequencies but also tunable electronically. In addition, implemented by current-mode square-root circuit blocks, current mirrors and capacitors, the proposed low-pass filter can be operated with a 3.3 V power supply voltage. The proposed circuit has been simulated in 0.35 μm CMOS technology, and the simulation results show that the proposed circuit has the merits of high frequency operation, tuneability, low power supply voltage operation

Keywords

CMOS analogue integrated circuits; active filters; circuit tuning; current-mode circuits; integrated circuit design; low-pass filters; low-power electronics; radiofrequency filters; 0.35 micron; 3.3 V; MOSFET square law; current mirrors; current-mode square-root circuit blocks; cutoff frequency tuning; electronically tunable filter; high frequency operation; log domain low-pass filters; low power supply voltage operation; tuneability; CMOS technology; Capacitors; Circuit simulation; Cutoff frequency; Low pass filters; MOSFET circuits; Mirrors; Power supplies; Tunable circuits and devices; Tuned circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

ASICs, 2000. AP-ASIC 2000. Proceedings of the Second IEEE Asia Pacific Conference on

Conference_Location

Cheju

Print_ISBN

0-7803-6470-8

Type

conf

DOI

10.1109/APASIC.2000.896895

Filename

896895