Title :
Successive approximation tuning of monolithic continuous-time filters
Author :
Franca, J.E. ; Nunes, F.
Author_Institution :
Inst. Superior Tecnico, Lisboa, Portugal
Abstract :
The authors propose the tuning of monolithic continuous-time filters employing a successive approximation algorithm to control the automatic adjustment of a two-integrator loop to its nominal resonant frequency depending on an error signal provided by a digital phase discriminator. This achieves high-precision tunability which does not depend on tight circuit matching.
Keywords :
active filters; approximation theory; linear integrated circuits; monolithic integrated circuits; tuning; active RC TIL structure; digital phase discriminator; monolithic continuous-time filters; resonant frequency; successive approximation algorithm; tuning; two-integrator loop;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921078
