Fully-integrated correlated tuning processor for continuous-time filters

Author

VanPeteghem, P. ; Brooks, T. ; Adams, W. ; Fossati, H. ; Loh, K. ; Narayan, S. ; Spalding, G. ; Yin, R.

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

fYear

1990

fDate

13-16 May 1990

Abstract

Measurement results on the correlated tuning loop (CTL), a novel tuning loop for continuous-time filters integrated in a 2 μm CMOS process are presented. Measured performance indicates that a second-order bandpass filter at 2.5 MHz and Q-factor of 10 can be tuned with an error in resonance frequency of only 0.2% and a gain error of only 1.1 dB. The prototype circuit, which measures 4.8 mm², has been designed and optimized specifically to tune a second order bandpass filter at 10 MHz. The CTL approach, however, may be applied to any filter structure in which the attenuation specifications can be translated to specifications of real and imaginary parts of transfer functions

Keywords

CMOS integrated circuits; Q-factor; active filters; band-pass filters; transfer functions; tuning; variable-frequency oscillators; 2 micron; CMOS process; CTL; Q-factor; attenuation specifications; continuous-time filters; correlated tuning processor; gain error; resonance frequency; second-order bandpass filter; transfer functions; tuning loop; Band pass filters; CMOS process; Frequency measurement; Gain measurement; Integrated circuit measurements; Performance gain; Q factor; Resonance; Resonant frequency; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 1990., Proceedings of the IEEE 1990

Conference_Location

Boston, MA

Type

conf

DOI

10.1109/CICC.1990.124800

Filename

124800