Number | Date | Country | Kind |
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96 00548 | Jan 1996 | FRX |
Number | Name | Date | Kind |
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5323157 | Ledzius et al. | Jun 1994 |
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Louis A. Williams, Third-Order Cascaded Sigma-Delta Modulators, IEEE Transactions on Circuits and Systems,vol. 38, No. 5, pp. 489-498, May 1991. |