Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Patent
1993-10-19
1995-05-16
Psitos, Aristotelis
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
360 67, G11B 5035, G11B 502
Patent
active
054166470
ABSTRACT:
A continuous-time analog signal filter arrangement, for realizing a magnitude frequency characteristic which increases for increasing frequencies over a part of the operating frequency range of the filter arrangement, includes an input terminal (1) for receiving an input signal, an output terminal (9) for supplying an output signal which is a filtered version of the input signal, and a number of N integrator elements (5.1, 5.2, . . . , 5.N) connected in series and being included in a feedback loop, where N.gtoreq.2. For each of the N integrator elements the relation holds that the input signal of an integrator element is a differentiated version of its output. Further, the filter arrangement includes a first multiplier arrangement (7) for multiplying the signals present at the input of the first integrator element in the series arrangement of N integrator elements and present at the outputs of the integrator elements by a multiplication factor (a(n)) and for supplying the multiplied signals to signal combination circuit (6), an output (8) of which is being coupled to the output terminal.
REFERENCES:
P. Pai et al., "A simple continuous-time equalizer for use in magnetic storage read channels", IEEE Journal on Selected Areas in Communications, vol. 10, No. 1, Jan. 1992, pp. 289-299.
R. C. Schneider, "An improved pulse-slimming method for magnetic recording", IEEE Transactions on Magnetics, vol. Mag-11, No. 5, Sep. 1975, pp. 1240-1241.
G. A. de Veirman et al., "Monolithic 10-30 MHz tunable bipolar Bessel lowpass filter", Proc. of the ISCAS, pp. 1444-1447, 1991 no month available.
Trihy et al., "An Accurate and Compact Model For The Transient Simulation of Continuous-Time Filters", Proc. of the IEEE 1990 Custom Integrated Circuits, pp. 881-884. May 1990.
Gensel, "Entwurf Von RC-Activen FLF-Filtern", Nachrichten Technik Elektronik, vol. 27, No. 5, 1977, pp. 200-202 no month available.
Goodman Edward W.
Psitos Aristotelis
U.S. Philips Corporation
Wamsley Patrick
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