Current injection tapped delay line spectral shaping equalizer a

Details Current injection tapped delay line spectral shaping equalizer a Current injection tapped delay line spectral shaping equalizer a

1980-04-09

1982-03-09

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 40, 360 45, G11B 509

Patent

active

043192882

ABSTRACT:
A tapped delay line (38) terminated with its characteristic impedance at both ends is connected to receive a differential input signal in intermediate taps (27, 29) of a delay line. Delay line taps (25, 27, 29, 31), as well as ends (21, 23) are connected symmetrically to two pair of summing networks (59, 61 and 83, 85) where voltage signal components having different delays from the input signal are linearly combined. One pair of summing networks (59, 61) produces a balanced differential output signal which is an amplitude equalized and differentiated version of the input signal, while the other pair of summing networks (83, 85) produces another balanced differential output signal which is a different amplitude equalized version of the input signal. Each version is needed in one of the channels of a dual channel signal detector for detecting the peaks of the variable amplitude input signal.

REFERENCES:
patent: 3516066 (1970-06-01), Jacoby
patent: 3775759 (1973-11-01), Armitage, Jr. et al.
patent: 4081756 (1978-03-01), Price et al.
"A 6K BPI Disk Storage Using Mod-II Interface" by A. P. Geffon, IEEE Transactions on Magnetics, vol. Mag-13 #5, Sep. 1977.
"Signal-Processing Circuit for Magnetic Data Recording" by D. M. Taub, IBM T.D.B., vol. 20, No. 5, 10/77.

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