An active filter achieving 43.6dBm OIP3

Author

Kim, Helen ; Green, Merlin ; Miller, Benjamin ; Bolstad, Andrew ; Santiago, Dan

Author_Institution

MIT Lincoln Lab., Lexington, MA, USA

fYear

2011

fDate

5-7 June 2011

Firstpage

1

Lastpage

4

Abstract

An active filter with a 50 Ω buffer suitable as an anti-alias filter to drive a highly linear ADC is implemented in 0.13 μm SiGe BiCMOS. This 6^th-order Chebyshev filter has a 3 dB cutoff frequency of 28.3 MHz and achieves 36.5 dBm OIP₃. Nonlinear digital equalization further improves OIP₃ to 43.6 dBm. Measurements show 92 dB of rejection at the stopband and a gain of 49 dB. The measured in-band OIP₃ of 43.6 dBm is 19 dB higher than previously published designs.

Keywords

BiCMOS integrated circuits; Chebyshev filters; Ge-Si alloys; active filters; analogue-digital conversion; 6th-order Chebyshev filter; BiCMOS; SiGe; active filter; antialias filter; frequency 28.3 MHz; linear ADC; nonlinear digital equalization; resistance 50 ohm; size 0.13 mum; Bandwidth; Cutoff frequency; Gain; Linearity; Low pass filters; Power harmonic filters; Active filter; OIP3; analog-to-digital converter; anti-alias filter; nonlinear digital equalization; spur free dynamic range (SFDR);

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2011 IEEE

Conference_Location

Baltimore, MD

ISSN

1529-2517

Print_ISBN

978-1-4244-8293-1

Electronic_ISBN

1529-2517

Type

conf

DOI

10.1109/RFIC.2011.5940717

Filename

5940717