Parametric recursive digital filter

Details Parametric recursive digital filter Parametric recursive digital filter

2007-10-23

2007-10-23

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

10675600

ABSTRACT:
A digital filter includes a delay network with a plurality of delay elements configured and arranged as all-pass filters, having a controllable coefficient value. In the case of a low-pass or high pass filter, the cut-off frequency of the filter can be controlled via the controllable coefficient value associated with phase angle. Similarly, in a bandpass filter, the center frequency is set as a function of the controllable coefficient value.

REFERENCES:
patent: 5325318 (1994-06-01), Harris et al.
patent: 5808924 (1998-09-01), White
patent: 5926455 (1999-07-01), Allpress
Schüssler et al., “Variable Digital Filters,” Arch. Elekt. Übertr., vol. 24, issue 11, pp. 524-525.
Karjalainen et al., “Realizable Warped IIR Filters and their Properties,” IEEE, pp. 2205-2208, 1997.

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