SU1314383A1 - Device for measuring time error in magnetic recording-reproducing - Google Patents

Abstract

This invention relates to the accumulation of information. The purpose of the invention is to determine the accuracy of measuring the time error in magnetic recording-reproduction. The device contains a reproducing magnetic head, a pulse signal shaper 2, a periodic signal generator 3, a trigger 4, an indicator 5, a BAN 6 element, a decoder 7 dual multiplexers 8 and 9, delay elements 10 and 11, a reversible counter 12 and element 13. And New elements and the formation of new connections between the elements of the device allows to determine the time error by calculating the difference between the number of periods of the reproduced signal and the signal of the generator 3 of the periodic signal. 1 il. i 1sl 00 00 CO

Description

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11314383

The invention relates to the accumulation of information, namely, devices for measuring the time error during magnetic recording-reproduction.

The purpose of the invention is to improve the accuracy of measuring the time error during magnetic recording-reproduction,

The drawing shows a device for measuring the time error during magnetic recording-reproduction.

The device contains a reproducing head 1, connected to the input of the imaging unit 2 of the pulse signal, the generator 3 of the periodic signal, the trigger 4, the indicator 5, the element BAN 6, connected by the input to the output of the imaging generator 2 of the pulse signal connected to the input of the gene-. periodic signal rarator 3, de-coded 7, connected to the first input of indicator 5, first and second dual multiplexers 8 and 9, first and second delay elements 10 and 11, reversible counter 12 and AND 13 element. First dual multiplexer 8 is connected the input of the first digit of the switch mode setting code to the trigger output .4 connected to the second input of the indicator 5. The second dual multiplexer 9 is connected by the first and second outputs to the trigger inputs 4. The outputs of the periodic signal generator and element

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means of the proposed device is as follows.

The periodic signal recorded on the magnetic recording medium is reproduced by the reproducing magnetic head 1 and is fed to the pulse shaper 2, generating a pulse sequence. The last pulse generator 2 is fed to the periodic signal generator 3 and to the BAN 6 element. The periodic signal generator 3 is phased with the first pulse of the pulse sequence of the pulse signal generator 2, and the BAN 6 element prevents the pulse from passing.

The generator 3 of the periodic signal and the element BAN 6 affect the first and second elements 10 and 11 of the delay. From the outputs of the first and second delay elements 10 and 11, the pulse sequences of the generator 3 of periodic si1; the pulse generator 2 of the pulse signal are received at the first moment. The first and second dual multiplexers B and 9, trigger 4, and element And 13 provide the summation, the input of the reversing counter 12, of that pulse, the pulse sequence, whose frequency is higher. In this case, if the frequency of the pulse sequence of the generator 2 pulse signal

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BAN 6 is connected to the information 5 of the frequency of the pulse sequence of the generator 3 of the periodic signal, then the sign of the time error coming from trigger 4 to the second input of indicator 5 is positive, and if lower, is negative.

Reversible counter 12 determines the difference between the number of pulses of the pulse sequences of the driver 2 of the pulse signal and the generator 3 of the periodic signal supplied to the decoder 7, which affects the first input of the indicator 5. Thus, the time error is determined by counting the difference between the number of periods of the reproduced signal and signal 3 periodic signal generator.

The use of the present invention provides an increase in the accuracy of measuring the time error during magnetic recording playback, as well as extending the upper limit of the time error measurement.

first and second parts of the second dual multiplexer 9, respectively, and connected respectively to the input of the first delay element 10 connected to the information inputs of the first and second parts of the first double multiplexer 8, and to the input of the second delay element connected to the other information inputs of the first and second parts of the first multiplexer 8, the outputs of which are connected respectively to the summing and subtracting inputs of the reversible counter 12. The outputs are reversible The second counter 12 is connected to the inputs of the decoder 7 and the inputs of the element I 13 connected to the output of the first bit of the mode setting code, switching the second dual multiplexer 9.

Measurement of time error in magnetic recording-playback by 50

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means of the proposed device is as follows.

The periodic signal recorded on the magnetic recording medium is reproduced by the reproducing magnetic head 1 and is fed to the pulse shaper 2, generating a pulse sequence. The last pulse generator 2 is fed to the periodic signal generator 3 and to the BAN 6 element. The periodic signal generator 3 is phased with the first pulse of the pulse sequence of the pulse signal generator 2, and the BAN 6 element prevents the pulse from passing.

The generator 3 of the periodic signal and the element BAN 6 affect the first and second elements 10 and 11 of the delay. From the outputs of the first and second delay elements 10 and 11, the pulse sequences of the generator 3 of periodic si1; the pulse and the former of the pulse signal 2 are received. The first and second dual multiplexers B and 9, trigger 4, and element And 13 provide the summation, the input of the reversing counter 12, of that pulse, the pulse sequence, whose frequency is higher. In this case, if the frequency of the pulse sequence of the generator 2 pulse signal

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Claims (1)

Invention Formula A device for measuring the time error during magnetic recording-reproduction, which contains a reproducing magnetic head connected to the input of the pulse former, a periodic signal generator, a trigger and an indicator, characterized in that., In order to measure the accuracy of the time error, an element is introduced into it A BAN, connected to the output of a pulse signal generator connected to the input of a periodic signal generator, a decoder connected to the first input of the indicator connected to the first input of the indicator Secondary dual multiplexer connected by the first digit input of the switch mode setting code to the trigger output connected to the second indicator input, the second dual multiplexer connected by the first and second part outputs to the inputs Editor I. Casard Compiled by Y.Rosenkrants Tehred V.Kadar Order 2215/52 Circulation 590 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 34 the trigger, the first and second delay elements, the reversible counter and the I element, with the outputs of the generator of the periodic signal and the BANNER element connected to the information inputs of the first and second parts of the second dual multiplexer, respectively, and connected respectively to the input of the first delay element, connected by the output to the information inputs of the first and second parts of the first dual multiplexer, and with the input of the second delay element connected by the output to other information inputs of the first and second parts of the first dual multiplexer connected by outputs Respectively to the summing and subtracting inputs of the reversing account the inputs of the decoder and the inputs of the AND element connected by the output to the input of the first digit of the code for setting the switching mode of the second dual multiplexer. Proofreader S.Lykova Subscription