Limit-cycle-free FIR/IIR halfband digital filter with shared...

Details Limit-cycle-free FIR/IIR halfband digital filter with shared... Limit-cycle-free FIR/IIR halfband digital filter with shared...

2007-11-06

2007-11-06

Payne, David C. (Department: 2611)

Pulse or digital communications

Equalizers

C375S350000, C708S300000

Reexamination Certificate

active

10417507

ABSTRACT:
A multiplexed FIR/IIR digital filter structure (300) which offers linear phase response and low group delay by switching on a FIR filter portion (31) or a IIR filter portion (32). To reduce the silicon area, the FIR/IIR filter (300) shares registers which is enabled because the FIR and IIR processing do not use the registers at the same time but rather consecutively. Further, the multiplexed FIR/IIR digital filter structure (300) can offer limit-cycle-free IIR operation using two's-complement truncation in combination with positive valued allpass coefficients.

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