Title :
Design of CMOS OTA-C integrator and its application to continuous-time second-order active C filter
Author :
Kim, D.Y. ; Ahn, J.C. ; Kim, H.Y.
Author_Institution :
Dept. of Electr. Eng., Chonbuk Nat. Univ., Chonju, South Korea
Abstract :
A continuous-time second-order filter for realization of all-pole functions is presented. The circuit uses only linearized CMOS operational transconductance amplifiers and capacitors (OTA-C or active-C) as the basic integrating block. As bias voltage varies from -4.32 V to -1.4 V the adjustment range of gm is from 2.8 nmhos to 44.58 μmhos. Computer simulation shows the frequency characteristics of the filter are nearly identical to the theoretical values
Keywords :
CMOS integrated circuits; active filters; integrating circuits; operational amplifiers; poles and zeros; -4.32 to -1.4 V; CMOS OTA-C integrator; all-pole functions; bias voltage; continuous-time second-order active C filter; digital simulation; frequency characteristics; linearized CMOS operational transconductance amplifiers; Active filters; Frequency; MOS capacitors; Mirrors; Resistors; Switched capacitor circuits; Switches; Switching circuits; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems, 1989., Proceedings of the 32nd Midwest Symposium on
Conference_Location :
Champaign, IL
DOI :
10.1109/MWSCAS.1989.101826
