Title :
A 1-MHz 7th-order continuous-time lowpass filter using very low distortion CMOS OTAs
Author :
Ibaragi, E. ; Hyogo, A. ; Sekine, K.
Author_Institution :
Sci. Univ. of Tokyo, Chiba, Japan
Abstract :
In this paper, a 1-MHz 7th-order Butterworth lowpass filter is designed. The filter is composed of very low distortion CMOS OTAs. The linearity of the OTA is free from mobility reduction and body effect. This is the reason that the OTA shows low distortion characteristics. Thus, the lowpass filter also has low distortion. We confirmed that the filter exhibited very low distortion by simulation. When an input signal with 1 V (peak-peak) and 333 kHz is applied, THD of the lowpass filter becomes only 0.094%
Keywords :
Butterworth filters; CMOS analogue integrated circuits; continuous time filters; harmonic distortion; low-pass filters; 1 MHz; 1 V; 333 kHz; Butterworth lowpass filter; CMOS; OTAs; THD; input signal; linearity; low distortion amplifiers; seventh-order continuous-time lowpass filter; Circuits; Diodes; Equations; Filters; MOSFETs; Mirrors; Prototypes; Threshold voltage; Transconductance; Transfer functions;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856392
