Title :
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
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 6th-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);
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2011 IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-8293-1
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2011.5940717
