Patent Number: 7,046,745

Title: Signal processing circuit

Abstract: In a data demodulating method, predetermined input data is demodulated based upon a response characteristic of the partial response class 4; the demodulated input data is discrete-filtered to thereby produce filtering data; and the filtering data is maximum likelihood-decoded to thereby produce asymmetrical response data. Further, a magnetic recording/reproducing apparatus is arranged by using this data demodulating method.

Inventors: Mita; Seiichi (Kanagawa-ken, JP), Sawaguchi; Hideki (Kodaira, JP), Kobayashi; Naoya (Odawara, JP), Kondo; Masaharu (Odawara, JP)

Assignee: Hitachi, Ltd.

International Classification: H03D 1/00 (20060101); G11B 5/035 (20060101); H04B 1/10 (20060101)

Expiration Date: 5/16/02018