Title :
A MOSFET-only continuous-time biquadratic filter
Author_Institution :
Integrated Syst. Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland
Abstract :
A MOSFET-only filter structure is described which employs an amplifier-regulated cascode structure to realize both conductance and transconductance, while the required capacitors are realized by MOSFET gate capacitance. The filter configuration is such that both MOSFET capacitors and MOSFET resistors are always biased in the triode region, so that the only remaining nonlinearity is that caused by mobility degradation due to the normal field, which can be reduced by differential structures
Keywords :
CMOS analogue integrated circuits; MOSFET circuits; biquadratic filters; continuous time filters; 1 mum; 560 kHz; CMOS technology; IF filter; MOSFET capacitors; MOSFET gate capacitance; MOSFET resistors; MOSFET-only continuous-time biquadratic filter; amplifier-regulated cascode structure; conductance; differential structures; mobility degradation; transconductance; triode region biasing; Capacitors; Degradation; Joining processes; MOSFET circuits; Nonlinear filters; Operational amplifiers; Resistors; Transconductance; Transconductors; Voltage;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.510237
