Digital resonant shelf filter

Details Digital resonant shelf filter Digital resonant shelf filter

2005-10-11

2010-11-09

Mai, Tan V (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical hybrid calculating computer

Particular function performed

C708S300000

Reexamination Certificate

active

07831645

ABSTRACT:
A method and system for designing a discrete-time filter having a transfer function which approximates that of an analog shelf filter is disclosed. Prior art methods include applying the bilinear transform to the analog filter, which has the drawback of warping high-frequency features of the desired transfer function. In an embodiment of the present invention, an analog filter is designed which anticipates the warping imposed by the bilinear transform. For filters whose features approach the Nyquist limit, the inventive method provides a closer approximation to the analog response than direct application of the bilinear transform.

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