CMOS Active-LC Bandpass Filters With Coupled-Inductor Q-Enhancement and Center Frequency Tuning

Bantas, S; Koutsoyannopoulos, Y

dc.contributor.author	Bantas, S	en
dc.contributor.author	Koutsoyannopoulos, Y	en
dc.date.accessioned	2014-03-01T01:20:00Z
dc.date.available	2014-03-01T01:20:00Z
dc.date.issued	2004	en
dc.identifier.issn	1057-7130	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15804
dc.subject	Active LC filters	en
dc.subject	Center frequency tuning	en
dc.subject	Integrated filters	en
dc.subject	Integrated inductors	en
dc.subject	Q enhancement	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Approximation theory	en
dc.subject.other	Bandwidth	en
dc.subject.other	CMOS integrated circuits	en
dc.subject.other	Electric inductors	en
dc.subject.other	Electric power utilization	en
dc.subject.other	Electric transformers	en
dc.subject.other	Optimization	en
dc.subject.other	Q factor measurement	en
dc.subject.other	Topology	en
dc.subject.other	Active filters	en
dc.subject.other	Electric currents	en
dc.subject.other	Electric power supplies to apparatus	en
dc.subject.other	Impedance matching (electric)	en
dc.subject.other	Integrated circuit layout	en
dc.subject.other	Integrated circuit manufacture	en
dc.subject.other	Tuning	en
dc.subject.other	Active LC filters	en
dc.subject.other	Center frequency tuning	en
dc.subject.other	Integrated inductors	en
dc.subject.other	Q enhancement	en
dc.subject.other	Integrated filters	en
dc.subject.other	Spiral transformer	en
dc.subject.other	Triple coupled inductor	en
dc.subject.other	Bandpass filters	en
dc.title	CMOS Active-LC Bandpass Filters With Coupled-Inductor Q-Enhancement and Center Frequency Tuning	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/TCSII.2003.821521	en
heal.identifier.secondary	http://dx.doi.org/10.1109/TCSII.2003.821521	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	A novel CMOS circuit for obtaining a bandpass response from a triple-coupled-inductor arrangement is presented, featuring Q-enhancement and center frequency tuning by means of vector-modulating a current flowing through one of the coupled inductors. A 0.35-mum CMOS LC filter prototype employing the technique has been fabricated and exhibits a center frequency tuning range of 11% around 1 GHz and Q values up to 180. The input 1-dB compression point is - 13 dBm with Q set to 20 and a power consumption of 12.2 mW. Additionally, an input impedance matching scheme around a spiral transformer is presented, which tracks the center frequency of the filter. The active-LC approach can be applied to higher order filter responses and find applications in tunable building blocks for agile RF front ends and multi-standard radios.	en
heal.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC	en
heal.journalName	IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing	en
dc.identifier.doi	10.1109/TCSII.2003.821521	en
dc.identifier.isi	ISI:000220363800004	en
dc.identifier.volume	51	en
dc.identifier.issue	2	en
dc.identifier.spage	69	en
dc.identifier.epage	76	en