In 1976, ISS Sperry/UNIVAC introduced the 8434 disk drive with the binary 3PM code. This
code increased the linear bit density by 50% over the generally accepted MFM code. The …

US4244008A - Read back compensation circuit for a magnetic recording device - Google
Patents US4244008A - Read back compensation circuit for a magnetic recording device …

Apparatus and method for decreasing decoding errors in data encoding of the type where
the relative time of occurrence of successive peaks determines the data content, and the …

In a storage system having a moving magnetic recording sur face, a method and apparatus
for providing constant am plitude readback information data, regardless of the initial …

57 ABSTRACT A data extracting circuit including an input terminal supplied with an input
signal which is reproduced from a magnetic tape, positive and negative peak hold cir cuits …

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 …

In a magnetic recording system wherein a playback waveform is induced in a read
transducer, detecting apparatus adapted to sense the occurrence of positive and negative …

An apparatus for recovering pulse-code modulated digital data from a readback signal has
equipment for partially equalizing the readback signal, and equip ment for completing the …

The present invention is a read post compensator circuit for a magnetic record/reproduce
device, and comprises transducer means for reading a sequence of magnetically coded …

The invention is concerned with producing interference-free (square) pulses with clean
leading and trailing edges, from a pulse generator subject to vibration. This is effected by …