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 IV(peak-peak) and 333 kHz is applied, THD of the lowpass filter becomes only 0.094%.
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|Publication status||Published - 1 Jan 2000|
|Event||Proceedings of the IEEE 2000 Internaitonal Symposium on Circuits and Systems - Geneva, Switz|
Duration: 28 May 2000 → 31 May 2000