Title :
Performance comparison of continuous-time IFLF and LF low-pass all-pole OTA-C filters
Author :
Su, H.W. ; Sun, Y.
Author_Institution :
Fac. of Eng. & Inf. Sci., Hertfordshire Univ., Hatfield, UK
Abstract :
This paper presents the performance comparison of two typical multiple loop feedback all-pole operational transconductance amplifier-capacitor (OTA-C) filters: inverse-follow-the-leader-feedback (IFLF) and leapfrog (LF) filters. Two fourth-order structures are analysed and compared in terms of sensitivity, maximum input signal, noise, and OTA nonideality effects on magnitude response. Simulation results obtained show that the LF structure is better than the IFLF structure in these four performances. The comparison is based on the realisation of the fourth-order Butterworth low-pass characteristic with 1 MHz cut-off frequency
Keywords :
Butterworth filters; circuit feedback; circuit noise; continuous time filters; linear network analysis; low-pass filters; operational amplifiers; poles and zeros; sensitivity analysis; OTA nonideality effects; active filter noise; continuous-time OTA-C filters; fourth-order Butterworth low-pass characteristic; fourth-order structures; inverse-follow-the-leader-feedback; leapfrog filters; low-pass all-pole OTA-C filters; magnitude response; maximum input signal; multiple loop feedback; operational transconductance amplifier; performance comparison; sensitivity; Feedback loop; Frequency; Information filtering; Information filters; Low pass filters; Low-frequency noise; Operational amplifiers; Signal analysis; Sun; Transconductance;
Conference_Titel :
Circuits and Systems, 2000. IEEE APCCAS 2000. The 2000 IEEE Asia-Pacific Conference on
Conference_Location :
Tianjin
Print_ISBN :
0-7803-6253-5
DOI :
10.1109/APCCAS.2000.913486
