Title :
CCII-based continuous-time filters with reduced gain-bandwidth sensitivity
Author :
Liu, S.-I. ; Tsao, H.W. ; Wu, J.
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
4/1/1991 12:00:00 AM
Abstract :
Some new MOSFET-C integrators and CMOS current conveyors for realisations of ladder filters are proposed. These integrators require smaller capacitance than those currently used. The integrators also provide a better high-frequency performance in terms of gain and phase error responses. A sixth-order bandpass ladder filter, with 460 kHz centre frequency, 0.5 dB ripple, and ripple bandwidth 120 kHz, is designed and simulated. A third-order lowpass filter, with 2 dB ripple and 50 kHz ripple bandwidth, is experimentally demonstrated. The results reported in the paper will be useful in the realisation of high-frequency integrated continuous-time filters
Keywords :
CMOS integrated circuits; active filters; band-pass filters; integrating circuits; ladder networks; low-pass filters; sensitivity analysis; 120 kHz; 460 kHz; 50 kHz; CCII-based continuous-time filters; CMOS current conveyors; MOSFET-C integrators; centre frequency; gain-bandwidth sensitivity; high-frequency performance; ladder filters; phase error responses; ripple; ripple bandwidth; sixth-order bandpass ladder filter; third-order lowpass filter;
Journal_Title :
Circuits, Devices and Systems, IEE Proceedings G
