Magnetic recording system with peak shift compensation

Claim 1

A system for writing digital data on magnetic recording medium which is D.C. premagnetized in a substantially single polarized direction, which system compensates to avoid peak shift during read-out due to the subsequent magnetic recording of data on said medium which magnetic data traverses said medium in substantially the said polarized direction as the polarized direction of D.C. premagnetization, said system including: a magnetic write head transducer for selectively applying magnetic data to D.C. premagnetized magnetic recording medium in a polarized direction which traverses such medium in substantially the same direction and its D.C. premagnetized polarized direction and in at least one other direction; means for providing digital data encoding signals for activating said magnetic transducer to selectively apply polarized magnetic data to D.C. premagnetized magnetic recording medium in subsantially the same direction as the direction of D.C. premagnetization and in at least one other direction; and means for adjusting the timing of the digital data encoding signal means when its activating signal is of the kind which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of said medium, wherein said timing adjusting means includes a resistor, a capacitor, and a first and second inverter, said resistor and said capacitor being in parallel with one another, said resistor and capacitor also both being in series with said signal encoding means, and wherein said first inverter is located in series between said signal encoding means and said resistor and capacitor and said second inverter is located in series after said resistor and capacitor; whereby peak shift due to the recording of data which traverses D.C. premagnetized magnetic medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization of said medium is compensated to avoid shift in the read-out of data recorded on said D.C. premagnetized magnetic medium.

Claim 2

A system for writing digital data on magnetic recording medium which is D.C. premagnetized in a substantially single polarized direction, which system compensates to avoid peak shift during read-out due to the subsequent magnetic recording of data on said medium which magnetic data traverses said medium in substantially the said polarized direction as the polarized direction of D.C. premagnetization, said system including: a magnetic write head transducer for selectively applying magnetic data to D.C. premagnetized magnetic recording medium in a polarized direction which traverses such medium in substantially the same direction and its D.C. premagnetized polarized direction and in at least one other direction; means for providing digital data encoding signals for activating said magnetic transducer to selectively apply polarized magnetic data to D.C. premagnetized magnetic recording medium in subsantially the same direction as the direction of D.C. premagnetization and in at least one other direction; and means for adjusting the timing of the digital data encoding signal means when its activating signal is of the kind which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of said medium, wherein said timing adjusting means includes a resistor, a capacitor, and a first and second inverter, said resistor and said capacitor being in parallel with one another, said resistor and capacitor also both being in series with said signal encoding means, and wherein said first inverter is located in series between said signal encoding means and said resistor and capacitor and said second inverter is located in series after said resistor and capacitor; whereby peak shift due to the recording of data which traverses D.C. premagnetized magnetic medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization of said medium is compensated to avoid shift in the read-out of data recorded on said D.C. premagnetized magnetic medium.

Claim 4

A system for writing digital data on magnetic recording medium which is D.C. premagnetized in a substantially single polarized direction, which system compensates to avoid peak shift during read-out due to the subsequent magnetic recording of data on said medium which magnetic data traverses said medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization, said system including: a magnetic write head transducer for selectively applying magnetic data to D.C. premagnetized magnetic recording medium in a polarized direction which traverses such medium in substantially the same direction and its D.C. premagnetized polarized direction and in at least one other direction; means for providing digital data encoding signals for activating said magnetic transducer to selectively apply polarized magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction as the direction of D.C. premagnetization and in at least one other direction; and means for adjusting the timing of the digital data encoding signal means when its activating signal is of the kind which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of said medium, wherein said timing adjusting means includes a delay line and a "D" type flip-flop, said delay line being in series between said signal encoding means and said flip-flop, and with said flip-flop also being in shunted direct series contact with said signal encoding means, said flip-flop arranged for activation in response to a signal which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of polarized D.C. premagnetization of the medium; whereby peak shift due to the recording of data which traverses D.C. premagnetized magnetic medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization of said medium is compensated to avoid shift in the read-out of data recorded on said D.C. premagnetized magnesium medium.

Claim 5

A system for writing digital data on magnetic recording medium which is D.C. premagnetized in a substantially single polarized direction, which system compensates to avoid peak shift during read-out due to the subsequent magnetic recording of data on said medium which magnetic data traverses said medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization, said system including: a magnetic write head transducer for selectively applying magnetic data to D.C. premagnetized magnetic recording medium in a polarized direction which traverses such medium in substantially the same direction and its D.C. premagnetized polarized direction and in at least one other direction; means for providing digital data encoding signals for activating said magnetic transducer to selectively apply polarized magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction as the direction of D.C. premagnetization and in at least one other direction; and means for adjusting the timing of the digital data encoding signal means when its activating signal is of the kind which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of said medium, wherein said timing adjusting means includes a delay line and a "D" type flip-flop, said delay line being in series between said signal encoding means and said flip-flop, and with said flip-flop also being in shunted direct series contact with said signal encoding means, said flip-flop arranged for activation in response to a signal which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of polarized D.C. premagnetization of the medium; whereby peak shift due to the recording of data which traverses D.C. premagnetized magnetic medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization of said medium is compensated to avoid shift in the read-out of data recorded on said D.C. premagnetized magnesium medium.

Claim 6

A system for writing digital data on magnetic recording medium which is D.C. premagnetized in a substantially single polarized direction, which system compensates to avoid peak shift during read-out due to the subsequent magnetic recording of data on said medium which magnetic data traverses said medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization, said system including: a magnetic write head transducer for selectively applying magnetic data to D.C. premagnetized magnetic recording medium in a polarized direction which traverses such medium in substantially the same direction and its D.C. premagnetized polarized direction and in at least one other direction; means for providing digital data encoding signals for activating said magnetic transducer to selectively apply polarized magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction as the direction of D.C. premagnetization and in at least one other direction; and means for adjusting the timing of the digital data encoding signal means when its activating signal is of the kind which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of said medium, wherein said timing adjusting means includes a capacitor, said capacitor being in series with said signal encoding means, said capacitor located and selected for activation in response to a signal which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of the medium; whereby peak shift due to the recording of data which traverses D.C. premagnetized magnetic medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization of said medium is compensated to avoid shift in the read-out of data recorded on said D.C. premagnetized magnetic medium.

Claim 7

A system for writing digital data on magnetic recording medium which is D.C. premagnetized in a substantially single polarized direction, which system compensates to avoid peak shift during read-out due to the subsequent magnetic recording of data on said medium which magnetic data traverses said medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization, said system including: a magnetic write head transducer for selectively applying magnetic data to D.C. premagnetized magnetic recording medium in a polarized direction which traverses such medium in substantially the same direction and its D.C. premagnetized polarized direction and in at least one other direction; means for providing digital data encoding signals for activating said magnetic transducer to selectively apply polarized magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction as the direction of D.C. premagnetization and in at least one other direction; and means for adjusting the timing of the digital data encoding signal means when its activating signal is of the kind which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of said medium, wherein said timing adjusting means includes a capacitor, said capacitor being in series with said signal encoding means, said capacitor located and selected for activation in response to a signal which would activate said magnetic transducer to apply magnetic data to D.C. premagnetized magnetic recording medium in substantially the same direction of polarization as the direction of the polarized D.C. premagnetization of the medium; whereby peak shift due to the recording of data which traverses D.C. premagnetized magnetic medium in substantially the same polarized direction as the polarized direction of D.C. premagnetization of said medium is compensated to avoid shift in the read-out of data recorded on said D.C. premagnetized magnetic medium.