Title :
Architectural Evolution of Integrated M-Phase High-Q Bandpass Filters
Author :
Mirzaei, Ahmad ; Darabi, Hooman ; Murphy, David
Author_Institution :
Broadcom Corp., Irvine, CA, USA
Abstract :
-phase bandpass filters (BPFs) are analyzed, and variations of the structure are proposed. For values of that are integer multiples of 4, the conventional -phase BPF structure is modified to take complex baseband impedances and frequency-translate their complex impedance response to the local oscillator frequency. Also, it is demonstrated how the -phase BPF can be modified to implement a high quality factor (Q) image-rejection BPF with quadrature RF inputs. In addition, we present high-Q BPFs whose center frequencies are equal to the sum or difference of the RF and IF (intermediate frequency) clocks. Such filters can be useful in heterodyne receiver architectures.
Keywords :
band-pass filters; clocks; impedance matching; oscillators; IF clocks; M-phase bandpass filters; RF clocks; architectural evolution; center frequency; complex baseband impedances; complex impedance response; frequency-translate; heterodyne receiver architectures; image-rejection BPF; integrated M-phase high-Q bandpass filters; intermediate frequency clocks; local oscillator frequency; phase BPF structure; quadrature RF inputs; quality factor; Band pass filters; Baseband; Clocks; Harmonic analysis; Impedance; Power harmonic filters; Radio frequency; $N$-path filtering; Bandpass filter; CMOS; impedance transformation; switching circuits;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2011.2161370
