Fast Automatic Tuning of Channel Selection Filters Based on Phase Delay Calibration

Author

Kagoshima, Kanetomo ; Kawama, Shuichi ; Toyoyama, Shinji ; Iizuka, Kunihiko

Author_Institution

Sharp Corp., Tenri

fYear

2006

Firstpage

837

Lastpage

840

Abstract

An automatic tuning method for active-RC base-band filters used in direct conversion receivers is proposed. Filter calibration is realized by setting the phase delay for a reference frequency of 4.5 MHz to -360deg. The proposed method is accurate and area efficient, since it does not require a replica filter but uses the filter itself. In addition, monotonic control of the capacitor arrays makes fast tuning possible. A pair of base band filters for DVB-H receivers including this automatic tuning method was fabricated using a 0.5mum SiGe Bi-CMOS process. The accuracy of the tuning is limited by the resolution of the binary capacitor-array and is 12deg. This corresponds to a worst case cutoff frequency deviation of 300 kHz. The tuning takes 113.8musec

Keywords

BiCMOS integrated circuits; Ge-Si alloys; RC circuits; active filters; calibration; channel bank filters; circuit tuning; radio receivers; 0.5 micron; 113.8 mus; 4.5 MHz; DVB-H receivers; SiGe; SiGe BiCMOS process; active-RC filters; automatic tuning method; baseband filters; binary capacitor-array; channel selection filters; direct conversion receivers; filter calibration; monotonic control; phase delay calibration; Automatic control; Calibration; Capacitors; Delay; Digital video broadcasting; Filters; Frequency; Germanium silicon alloys; Silicon germanium; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2006. CICC '06. IEEE

Conference_Location

San Jose, CA

Print_ISBN

1-4244-0075-9

Electronic_ISBN

1-4244-0076-7

Type

conf

DOI

10.1109/CICC.2006.320842

Filename

4115083