The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 1996
Filed:
Jan. 07, 1994
David R Main, Boulder Creek, CA (US);
The 3DO Company, Redwood City, CA (US);
Abstract
Apparatus and method for use with a sampled input signal having an input sampling frequency F.sub.S. The apparatus including M digital filters, each receiving the input signal, each having a respective transfer characteristic h.sub.m [n] and each producing a respective output signal updated at the input sample rate F.sub.S, each m'th one of the filters updating its output signal in response to a respective m'th phase of the input sample clock, M.gtoreq.2. The apparatus then combines the output signals of the digital filters to produce a combined output signal having a sample rate of at least MF.sub.S. The apparatus may also be viewed as a hybrid digital/analog filter. The method includes steps of receiving the sampled input signal, filtering the sampled input signal through P filters, combining the outputs of the P filters to produce M output signals, 1<M.ltoreq.P, each m'th one of the M output signals being updated in time for respective m'th one of the phase of the input sampling frequency F.sub.S, and combining the M output signals to produce a combined output signal having a sample rate of at least MF.sub.S.