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Title:
HYBRID FINITE IMPULSE RESPONSE FILTER
Document Type and Number:
WIPO Patent Application WO/2016/198481
Kind Code:
A3
Abstract:
In accordance with embodiments of the present disclosure, a hybrid finite impulse response filter having a plurality of delay stages comprising a first filter portion and a second filter portion. In some embodiments, the first filter portion may be a high-rate filter portion associated with a first portion of the plurality of delay stages and configured to filter an input signal having a first sampling rate to generate a first intermediate output signal and the second portion may be a low-rate filter portion associated with a second portion of the plurality of delay stages and configured to filter a downsampled version of the input signal at a second sampling rate to generate a second intermediate output signal. In other embodiments, the first filter portion may include an analog filter portion associated with a first portion of the plurality of delay stages and configured to filter an input signal to generate a first intermediate output signal and the second filter portion may be a digital filter portion associated with a second portion of the plurality of delay stages and configured to filter the input signal.

Inventors:
ALDERSON JEFFREY (US)
MELANSON JOHN (US)
KWATRA NITIN (US)
HELLMAN RYAN (US)
Application Number:
PCT/EP2016/063079
Publication Date:
January 12, 2017
Filing Date:
June 08, 2016
Export Citation:
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Assignee:
CIRRUS LOGIC INT SEMICONDUCTOR LTD (GB)
International Classes:
H03H17/02; G10K11/178; H03H17/06
Domestic Patent References:
WO1993004529A11993-03-04
WO1994007212A11994-03-31
Foreign References:
US20120185524A12012-07-19
US4649507A1987-03-10
US5204827A1993-04-20
US20140307887A12014-10-16
US20130182792A12013-07-18
EP1921603A22008-05-14
EP2259250A12010-12-08
Other References:
GOECKLER H G ET AL: "EFFICIENT MULTIRATE DIGITAL FILTERS BASED ON FRACTIONAL POLYPHASE DECOMPOSITION FOR SUBNYQUIST PROCESSING", ECCTD. PROCEEDINGS OF THE EUROPEAN CONFERENCE ON CIRCUIT THEORYAND DESIGN, XX, XX, vol. 1, 1 January 1999 (1999-01-01), pages 409 - 412, XP008061335
Attorney, Agent or Firm:
DAVIES, Philip (GB)
Download PDF:
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