A highly accurate step-response-based successive-approximation frequency tuning scheme for high-Q continuous-time bandpass filters

Author

Pham, Tien K. ; Allen, Phillip E.

Author_Institution

Nat. Semicond. Corp., Tucson, AZ, USA

Volume

50

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

221

Lastpage

227

Abstract

A tuning technique for high-Q integrated continuous-time bandpass filters (BPFs) suitable for high-performance wireless applications is presented. The tuning scheme uses the step response of the BPF of interest to obtain observability such that direct tuning can be achieved. The tuning process is carried out by employing a successive-approximation (SA) algorithm to search for the desired center frequency of the BPF. Compensation techniques for the SA algorithm to improve the tuning time are also presented.

Keywords

band-pass filters; circuit tuning; compensation; continuous time filters; integrated circuit design; step response; IC design; center frequency; compensation techniques; direct tuning; high-Q continuous-time bandpass filters; high-performance wireless applications; observability; step-response-based successive-approximation frequency tuning; tuning time; Band pass filters; Circuit optimization; Frequency; Master-slave; Matched filters; Observability; Phase locked loops; Signal processing algorithms; Tuning; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/TCSII.2003.810565

Filename

1198362