A quadrature charge-domain filter with an extra in-band filtering for RF receivers

Author

Huang, Ming-Feng

Author_Institution

Inf. & Commun. Res. Labs., Ind. Technol. Res. Inst., Hsinchu, Taiwan

fYear

2010

fDate

23-25 May 2010

Firstpage

31

Lastpage

34

Abstract

A quadrature charge-domain filter (QCDF) is proposed. This QCDF, based on the input phases, could provide a stop-band filtering and support an in-band filtering of noise. Through the use of FIR coefficient, the alias-band rejection (ABR) and in-band suppression (IBS) could be well controlled. Measurement shows the 27.1dB ABR and 31.3dB IBS from out-of-phase signals and in-phase signals, respectively. This QCDF with 36MHz bandwidth and 7.5dBm IIP₃ is fabricated on the 90nm CMOS process.

Keywords

FIR filters; radio receivers; CMOS process; FIR coefficient; QCDF; RF receivers; alias-band rejection; frequency 36 MHz; in-band filtering; in-band suppression; quadrature charge-domain filter; size 90 nm; stop band filtering; Band pass filters; Circuit noise; Clocks; Finite impulse response filter; IIR filters; Information filtering; Information filters; Low pass filters; Radio frequency; Signal sampling; Anti-alias filer (AAF); Charge-domain filter (CDF); Quadrature Charge-domain filter (QCDF); Time-interleaving CDF (TICDF);

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2010 IEEE

Conference_Location

Anaheim, CA

ISSN

1529-2517

Print_ISBN

978-1-4244-6240-7

Type

conf

DOI

10.1109/RFIC.2010.5477350

Filename

5477350