The effects of mismatch in complex bandpass ΔΣ modulators
作者： S.A. Jantzi , K.W. Martin , A.S. Sedra
DOI: 10.1109/ISCAS.1996.539870
关键词:
摘要: Mismatch between the real and imaginary channels of a complex system is examined equations are presented that show relationship mismatch image rejection. An example given demonstrates effects on properties filter. These results applied to design fourth-order bandpass /spl Delta//spl Sigma/ modulator technique discussed alleviates negative performance. The modifies modulator's noise transfer function by placing notch in its band, giving an SNR performance improvement approximately 15 dB (2.5 bits) over unmodified modulator. practical implementation this discussed.
sci-hub.se 参考文章(6)
P.M. Aziz, H.V. Sorensen, J. Van der Spiegel, Performance of complex noise transfer functions in bandpass and multi band sigma delta systems international symposium on circuits and systems. ,vol. 1, pp. 641- 644 ,(1995) , 10.1109/ISCAS.1995.521595
S. Jantzi, K. Martin, M. Snelgrove, A. Sedra, A complex bandpass /spl Delta//spl Sigma/ converter for digital radio international symposium on circuits and systems. ,vol. 5, pp. 453- 456 ,(1994) , 10.1109/ISCAS.1994.409407
G. Schultes, E. Bonek, P. Weger, W. Herzog, Basic performance of a direct conversion DECT receiver Electronics Letters. ,vol. 26, pp. 1746- 1748 ,(1990) , 10.1049/EL:19901122
R. Schreier, M. Snelgrove, Bandpass sigma-delta modulation Electronics Letters. ,vol. 25, pp. 1560- 1561 ,(1989) , 10.1049/EL:19891048
S.A. Jantzi, W.M. Snelgrove, P.F. Ferguson, A fourth-order bandpass sigma-delta modulator custom integrated circuits conference. ,vol. 28, pp. 282- 291 ,(1993) , 10.1109/4.209995
A. S. Sedra, Complex analog bandpass filters designed by linearly shifting real low-pass prototypes international symposium on circuits and systems. ,vol. 3, pp. 1223- 1226 ,(1985)