Title :
A 5th order LP butterworth OTA-C filter with automatic tuning system
Author :
Haoqiong, Chen ; Shicai, Qin
Abstract :
This paper introduces a continuous time 5th order LP Butterworth OTA-C filter with cutoff frequency of 16 MHz. The automatic tuning system is implemented based on PLL with a special VCO. The simulation results show that the accuracy of the cutoff frequency is less than 1% and, even in the worst case, less than 3%.
Keywords :
Butterworth filters; circuit tuning; continuous time filters; low-pass filters; operational amplifiers; phase locked loops; voltage-controlled oscillators; 16 MHz; LP butterworth filter; OTA-C filter; PLL; VCO; automatic tuning system; continuous time filter; cutoff frequency; low pass filter; operational transconductance amplifier; phase locked loop; voltage controlled oscillator;
Conference_Titel :
ASIC, 2003. Proceedings. 5th International Conference on
Print_ISBN :
0-7803-7889-X
DOI :
10.1109/ICASIC.2003.1277600
