Read channel for magnetic recording

Claim 2

A read channel for magnetic recording comprising: a magnetic head for reproduction of information recorded on a magnetic recording medium; a read pulse generator responsive to a reproduction signal from said magnetic head and a differentiated signal of said reproduction signal to produce a read pulse signal, said read pulse generator including a first limiter circuit for generating a first gate signal from said reproduction signal, a second limiter circuit for generating a second gate signal from said differentiated signal, delay means for delaying said second gate signal relative to said first gate signal by a predetermined time delay and an OR circuit for ORing said first gate signal and said delayed second gate signal; and an output circuit responsive to said read pulse signal to produce a read data signal representative of the information.

Claim 3

A read channel for magentic recording according to claim 1 wherein said read pulse generator comprises means for delaying said second gate signal relative to said first gate signal by a predetermined time delay.

Claim 4

A read channel for magnetic recording according to claim 1 wherein said predetermined time delay is approximately 1/4 (1/fw), where fw is the maximum recording frequency for information to be recorded on the magnetic recording medium and (1/fw) is the maximum time for a data portion to be recorded on the magnetic recording medium.

Claim 5

A read channel for magnetic recording comprising: a magnetic head for reproduction of information recorded on a magnetic recording medium; a read pulse generator responsive to a reproduction signal from said magnetic head and a differentiated signal of said reproduction signal to produce a read pulse signal, said read pulse generator including a first limiter circuit for generating a first gate signal from said reproduction signal, a second limiter circuit for generating a second gate signal from said differentiated signal, a third limiter circuit for generating a zero-cross pulse from said differentiated signal, a first logical circuit for delivering only a zero-cross pulse generated during the delivery of said first gate signal, a second logical circuit for delivering only a zero-cross pulse generated during the delivery of said second gate signal, and an OR circuit for ORing the output signals of said first and second logical circuits; and an output circuit responsive to said read pulse signal to produce a read data signal representative of the information.

Claim 6

A read channel for magnetic recording comprising: a magnetic head for reproduction of information recorded on a magnetic recording medium; a read pulse generator responsive to a reproduction signal from said magnetic head and a differentiated signal of said reproduction signal to produce a read pulse signal, said read pulse generator including a first limiter circuit for generating a first gate signal from said reproduction signal, a second limiter circuit for generating a second gate signal from said differentiated signal, a third limiter circuit for generating a zero-cross pulse from said differentiated signal, a first logical circuit for delivering only a zero-cross pulse generated during the delivery of said first gate signal, a second logical circuit for delivering only a zero-cross pulse generated during the delivery of said second gate signal, and an OR circuit for ORing the output signals of said first and second logical circuits; and an output circuit responsive to said read pulse signal to produce a read data signal representative of the information.

Claim 7

A read channel for magnetic recording according to claim 4 wherein said read pulse generator comprises means for delaying said second gate signal relative to said first gate signal by a predetermined time delay.

Claim 8

A read channel for magnetic recording according to claim 5 wherein said predetermined time delay is approximately 1/4 (1/fw), where fw is the maximum recording frequency for the information to be recorded on the recorded medium and (1/fw) is the maximum time for a data portion to be recorded on the magnetic recording medium.

Claim 9

A read pulse generator for use in a read channel for magentic recording comprising: a first limiter circuit for generating a first gate signal from a reproduction signal waveform produced from a magnetic head; a second limiter circuit for generating a second gate signal from a differentiated signal waveform of said reproduction signal; delay means for delaying said second gate signal relative to said first gate signal by a predetermined time delay; and an OR circuit for ORing said first gate signal and said delayed second gate signal.

Claim 10

A read pulse generator for use in a read channel for magentic recording comprising: a first limiter circuit for generating a first gate signal from a reproduction signal waveform produced from a magnetic head; a second limiter circuit for generating a second gate signal from a differentiated signal waveform of said reproduction signal; delay means for delaying said second gate signal relative to said first gate signal by a predetermined time delay; and an OR circuit for ORing said first gate signal and said delayed second gate signal.