Title :
On-chip high-Q bandpass filtering using N-phase current driven passive mixers
Author :
Osman, Hatem ; Emira, Ahmed ; Mohieldin, Ahmed N. ; Abouzied, Mohamed ; Soliman, Ahmed
Author_Institution :
Fac. of Eng., Cairo Univ., Giza, Egypt
Abstract :
In this paper, the N-phase current driven passive mixer clocked by 1/N duty-cycle clocks is analyzed. The analysis shows that the N-phase passive mixer holds the property of impedance transformation, where it can frequency-translate baseband lowpass impedances into RF frequency to synthesize high-Q bandpass filters. This property can be used to replace the off-chip SAW filter in wireless receivers. For the proof of concept, the system is implemented in 65nm CMOS technology. The simulation results are in a close agreement with the theoretical results.
Keywords :
CMOS integrated circuits; band-pass filters; clocks; low-pass filters; radio receivers; surface acoustic wave filters; 1/N duty-cycle clocks; CMOS technology; N-phase current driven passive mixers; frequency-translate baseband lowpass impedances; impedance transformation; off-chip SAW filter; on-chip high-Q bandpass filtering; wireless receivers; Baseband; Clocks; Impedance; Mixers; Radio frequency; Receivers; Surface acoustic waves;
Conference_Titel :
Circuit Theory and Design (ECCTD), 2011 20th European Conference on
Conference_Location :
Linkoping
Print_ISBN :
978-1-4577-0617-2
Electronic_ISBN :
978-1-4577-0616-5
DOI :
10.1109/ECCTD.2011.6043318
