Title :
Design of a CMOS fully-differential continuous-time tenth-order filter based on IFLF topology
Author :
Chiang, D.H. ; Schaumann, Rolf
Author_Institution :
Dept. of Electr. Eng., Portland State Univ., OR, USA
Abstract :
The design of a CMOS fully-differential continuous time tenth-order lowpass filter with equiripple group delay based on the inverse-follow-the-leader feedback (IFLF) topology is discussed. A very-high-frequency operational transconductance amplifier (OTA) with negative resistive load (NRL) is used as a basic building block. Simulation results show the group delay sensitivity of IFLF circuits is very large. Measurement results verify the design method of IFLF filters, and also their sensitivity problems. Solutions are proposed
Keywords :
CMOS analogue integrated circuits; circuit feedback; continuous time filters; delays; differential amplifiers; negative resistance devices; operational amplifiers; sensitivity analysis; CMOS; IFLF topology; continuous-time tenth-order filter; equiripple group delay; fully-differential circuits; group delay sensitivity; inverse-follow-the-leader feedback; negative resistive load; sensitivity problems; very-high-frequency operational transconductance amplifier; Circuit topology; Delay; Design methodology; Feedback; Filtering theory; Filters; Network topology; Operational amplifiers; Transconductance; Transfer functions;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704203
