Title :
Design and tuning techniques for a 100 MHz CMOS continuous-time narrow-bandwidth bandpass filter
Author :
Santos, P.F. ; Franca, J.E. ; Schaumann, R.
Author_Institution :
Centre for Microsyst., Inst. Superior Tecnico, Lisbon, Portugal
Abstract :
This paper discusses design and tuning techniques for a narrow-bandwidth sixth-order Chebyshev bandpass continuous-time filter at very-high-frequencies. The direct simulation of a doubly terminated LC ladder filter formed by three capacitor-coupled grounded resonator sections employs capacitors and operational transconductance amplifiers for implementation in a standard digital 1.2 μm CMOS process. The automatic adjustment of both the center frequency and quality factor is based on the successive approximation tuning algorithm
Keywords :
CMOS analogue integrated circuits; Chebyshev filters; Q-factor; VHF filters; band-pass filters; circuit tuning; continuous time filters; integrated circuit design; ladder filters; mixed analogue-digital integrated circuits; 1.2 mum; 100 MHz; CMOS continuous-time narrow-bandwidth bandpass filter; VHF design; automatic tuning; capacitor-coupled grounded resonator sections; capacitors; center frequency adjustment; design techniques; digital 1.2 μm CMOS process; direct simulation; doubly terminated LC ladder filter; mixed mode analog digital locked loop; operational transconductance amplifiers; quality factor adjustment; sixth-order Chebyshev bandpass continuous-time filter; successive approximation tuning algorithm; tuning techniques; Band pass filters; CMOS process; Capacitors; Chebyshev approximation; Digital filters; Frequency; Operational amplifiers; Resonator filters; Termination of employment; Transconductance;
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.1995.510239
