Title :
A differential 4-path highly linear widely tunable on-chip band-pass filter
Author :
Ghaffari, Amir ; Klumperink, Eric A M ; Nauta, Bram
Author_Institution :
IC Design Group, Univ. of Twente, Enschede, Netherlands
Abstract :
A passive switched capacitor RF band-pass filter with clock controlled center frequency is realized in 65nm CMOS. An off-chip transformer which acts as a balun, improves filter-Q and realizes impedance matching. The differential architecture reduces clock-leakage and suppresses selectivity around even harmonics of the clock. The filter has a constant -3dB bandwidth of 35MHz and can be tuned from 100MHz up to 1GHz. IIP3 is better than 19dBm, P1dB=2dBm and NF<;5.5dB at Pdiss=2mW to 16mW.
Keywords :
CMOS integrated circuits; baluns; band-pass filters; clocks; harmonics; impedance matching; radiofrequency filters; switched capacitor filters; transformers; CMOS; balun; bandwidth 35 MHz; clock controlled center frequency; clock-leakage; differential 4-path highly linear widely tunable on-chip band-pass filter; differential architecture; filter-Q; harmonics; impedance matching; off-chip transformer; passive switched capacitor RF band-pass filter; power 2 mW to 16 mW; Band pass filters; Capacitors; Clocks; Impedance matching; Power harmonic filters; Radio frequency; Radiofrequency integrated circuits; Resistors; Switches; Tunable circuits and devices; CMOS bandpass filter; N-path filters; cognitive radio; commutated capacitor; inductorless; software-defined radio;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2010 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6240-7
DOI :
10.1109/RFIC.2010.5477314
