Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2007-09-18
2007-09-18
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S552000
Reexamination Certificate
active
10680129
ABSTRACT:
A ladder filter includes multiple inductor sections, each including voltage-controlled current sources and capacitors. A second signal input terminal is provided for the filter separately from an ordinary signal input terminal and a signal, which has been input through the second terminal, is supplied to one of the voltage-controlled current sources by way of a gain calculator. By adjusting the gain obtained by the gain calculator to an appropriate value, the ladder filter can make the numerator of its transfer function freely definable.
REFERENCES:
patent: 4381489 (1983-04-01), Canning et al.
patent: 4823092 (1989-04-01), Pennock
patent: 4839542 (1989-06-01), Robinson
patent: 5257286 (1993-10-01), Ray
patent: 5392003 (1995-02-01), Nag et al.
patent: 5596459 (1997-01-01), Kovner et al.
patent: 6144981 (2000-11-01), Kovacs et al.
patent: 6317016 (2001-11-01), Kuo
patent: 6369644 (2002-04-01), Yoshizawa
patent: 6838929 (2005-01-01), Mitteregger
patent: 7009446 (2006-03-01), Yoshida et al.
patent: 50-43860 (1975-04-01), None
patent: 6-61791 (1994-03-01), None
patent: 6-78007 (1994-03-01), None
patent: 6-164314 (1994-06-01), None
patent: 8-274583 (1996-10-01), None
“A 160 MHz Front-End IC for EPR-IV PRML Magnetic Storage Read Channels”, P. Pai et al., 1996 International Solid-State Circuits Conference (1996).
Dosho Shiro
Morie Takashi
Le Dinh T.
McDermott Will & Emery LLP
LandOfFree
Ladder filter, analog equalizer and signal readout system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ladder filter, analog equalizer and signal readout system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ladder filter, analog equalizer and signal readout system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3777856