Title :
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
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;
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
DOI :
10.1109/APASIC.2000.896895
