Digital tuning of an analog tunable bandpass BAW-filter at GHz frequency

被引：4

作者：

Razafimandimby, Stephane ^{[1
,2
]}

Tilhac, Cyrille ^{[1
,3
]}

Cathelin, Andreia ^{[1
]}

Kaiser, Andreas ^{[2
]}

Belot, Didier ^{[1
]}

机构：

[1] STMicroelect, Crolles, France

[2] IEMN ISEN, Lille, France

[3] XLIM MIACOM, Limoges, France

来源：

ESSCIRC 2007: PROCEEDINGS OF THE 33RD EUROPEAN SOLID-STATE CIRCUITS CONFERENCE | 2007年

关键词：

D O I：

10.1109/ESSCIRC.2007.4430284

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A master/slave technique which allows to digitally tune the center frequency of BAW RF band-pass filters is proposed to correct the process dispersions and temperature drifts affecting BAW resonators. The proposed scheme relies on detecting the error between the targeted frequency and the actual one by using an envelope detection technique and can be applied to all types of lattice filters. A Successive Approximation Register (SAR) allows reducing the locking time by its dichotomy function. A one stage-lattice BAW SMR (Solidly Mounted Resonators) filter and the proposed tuning circuit have been implemented in a 0.25 mu m BiCMOS process and measured. It ensures a less than 0.2% error. The tuning circuitry core's chip area is 0.15mm(2) and its power consumption is less than 9mW.

引用

页码：218 / +

页数：2