Novel centre frequency and bandwidth control of RF LNA using two-tones phase delay

Author

Salmeh, Roghoyeh ; Georgescu, Bogdan

fYear

2013

fDate

4-7 Aug. 2013

Firstpage

582

Lastpage

585

Abstract

This paper presents a two-tone system to control the center frequency and bandwidth of an RLC tank in front-end LNAs. The control mechanism is based on the characteristic of an RLC tank, which induces a phase difference between the two frequencies. The proposed system is implemented on chip in the TSMC 0.18 μm CMOS technology. The LNA´s centre frequency and bandwidth were set at 2.45 GHz and 60 MHz, respectively. Precisions of 0.2% for centre frequency control and 8% for the bandwidth control were achieved. The two-tones phase delay principle can be generalized to tuning based on any information signal containing two tones with related phases and known frequencies.

Keywords

CMOS analogue integrated circuits; RLC circuits; circuit tuning; low noise amplifiers; radiofrequency amplifiers; RF LNA; RLC tank; TSMC CMOS technology; bandwidth 60 MHz; bandwidth control; centre frequency control; frequency 2.45 GHz; front-end LNA; information signal; phase difference; size 0.18 mum; tuning; two-tone system; two-tones phase delay; Bandwidth Control; Center Frequency Control; GPS Receivers; LC Tank; LNA; Q-Enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (MWSCAS), 2013 IEEE 56th International Midwest Symposium on

Conference_Location

Columbus, OH

ISSN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2013.6674715

Filename

6674715