Title :
A current-mode 5th order elliptic lowpass filters
Author :
Gálvez-Durand, Federico
Author_Institution :
Univ. Fed. do Rio de Janeiro, Brazil
Abstract :
A novel analogue continuous-time current-mode filter synthesis technique is proposed based on a transformed set of state-equations that allow the utilization of only current-mode integrators; current-mode gyrators specifically designed are not necessary. The technique has been successfully used for synthesizing a 5th order lowpass elliptic filter from a passive doubly loaded ladder prototype. Only grounded capacitors are necessary; all floating capacitors and inductors are replaced with active simulations. Small-signal analyses have shown this filter performs well, preserving the low sensitivity inherent to the passive ladder prototype
Keywords :
CMOS analogue integrated circuits; continuous time filters; current-mode circuits; elliptic filters; linear network synthesis; low-pass filters; sensitivity analysis; CMOS process; MOFET-C integrators; active filters; active simulations; analogue filter synthesis technique; continuous-time filter; current-mode filter; current-mode integrators; fifth-order elliptic filter; floating-capacitor simulation; grounded capacitors; low sensitivity filter; lowpass elliptic filter; passive doubly loaded ladder prototype; small-signal analyses; state-equations; Active inductors; Circuit simulation; Integrated circuit synthesis; MOS capacitors; MOSFET circuits; Network synthesis; Passive filters; Prototypes; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-7150-X
DOI :
10.1109/MWSCAS.2001.986313
