公开(公告)号：JP2001274657A

公开(公告)日：2001-10-05

申请号：JP2001031150

申请日：2001-02-07

Applicant: ST MICROELECTRONICS SRL

Inventor： PISATI VALERIO ,  ROSSI AUGUSTO ,  BETTI GIORGIO ,  CAZZANIGA MARCO

IPC: G11B5/09 ,  G11B20/10 ,  H03H17/02 ,  H03H17/06

Abstract: PROBLEM TO BE SOLVED: To provide an FIR filter design that has a structure and a functional feature suitable for processing a signal whose spectrum is not known in advance and executes Hilbert transform so as to eliminate limitations and overcome defects of the design of a conventional technology. SOLUTION: This invention relates to a time continuous FIR(finite impulse response) filter that executes the Hilbert transform. The filter is provided with a delay cell connected in cascade between an input terminal and an output terminal of the filter and with a programmable time delay(Td) for a programmable filter cell having fixed filter coefficients (c0,..., cn). Furthermore, this invention also relates to a filtering method to use the structure of the Hilbert FIR filter to process a signal produced by reading data from a magnetic storage medium adopting the vertical recording.

公开(公告)号：DE60032727D1

公开(公告)日：2007-02-15

申请号：DE60032727

申请日：2000-02-29

Applicant: ST MICROELECTRONICS SRL

Inventor： PISATI VALERIO ,  ROSSI AUGUSTO ,  BETTI GIORGIO ,  CAZZANIGA MARCO

IPC: G11B5/09 ,  H03H17/02 ,  G11B20/10 ,  H03H17/06

Abstract: The invention relates to a time-continous FIR (Finite Impulse Response) filter whereby a Hilbert transform can be implemented. The filter comprises a cascade of delay cells connected between an input terminal of the filter and an output terminal; constant filter coefficients (cO,...,cn) and a programmable time delay (Td) of the programmable filter cells are provided. The invention also relates to a filtering method effective to enable use of this Hilbert FIR filter structure for processing signals originated by the reading of data from magnetic storage media which employ perpendicular recording.