Title :
On the design of band-pass quadrature ΣΔ modulators
Author :
Nithin Kumar, Y.B. ; Talay, Selçuk ; Maloberti, Franco
Author_Institution :
Electron. Dept., Univ. of Pavia, Pavia
fDate :
Nov. 30 2008-Dec. 3 2008
Abstract :
A design methodology for quadrature band-pass SigmaDelta modulator is proposed. The methodology uses a novel approach by locking IF frequency to sampling frequency which may considered as a disadvantage but as shown in this text that actually it is vice versa. The method is presented with derivation of the base circuitry and examples provided in order to present that the method is adequate for satisfying various different design cases in which ratio of IF frequency to input frequency is different and zero locations may be designed freely with the coefficient available in the methodology. Also, PSD of each design is provided for readers to observe the performance of possible designs.
Keywords :
band-pass filters; integrated circuit design; sigma-delta modulation; transfer functions; IF frequency; band-pass quadrature SigmaDelta modulators; noise transfer functions; power spectral density; sampling frequency; Calibration; Circuit noise; Clocks; Delay; Design methodology; Frequency conversion; GSM; Image converters; Noise shaping; Transfer functions;
Conference_Titel :
Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on
Conference_Location :
Macao
Print_ISBN :
978-1-4244-2341-5
Electronic_ISBN :
978-1-4244-2342-2
DOI :
10.1109/APCCAS.2008.4746248
