SU723658A1 - Device for reproducing digital information from magnetic record carrier - Google Patents

Description

one

The invention relates to magnetic recording, in particular, to devices for reproducing digital information from magnetic recording media.

A device for reproducing digital and {1format from magnetic recording media is known, containing 1: its information channel connected to the synchronization channel l. This device provides relatively high fidelity of digital information.

The disadvantage of it is the considerable difficulty of reproducing digital information recorded with high density.

It is also known a device for reproducing digital AND formations from a magnetic recording medium, containing information channels, each of which consists of an input bus of information signals and connected to its own level detector and an output bus of information pulses and connected to it.

the logical element And, the first input of which is connected to a peak detector of the synchronization channel connected between the input and output buses of the clock pulses 2. This unit provides playback of digital recordings recorded in high density.

Its disadvantage consists in a significant error of the result of reproduction of digital and 1 formation.

The purpose of the invention is to reduce the error of the result of reproducing digital information.

Claims (2)

This is achieved due to the fact that in the device for reproducing digital information from the magnetic recording medium, a trigger is inserted into each information channel and connected to the fuzz and zero inputs of the first and second differentiating chains. At the same time, in each information channel, the input of the first differentiating chain is connected to the output of the level detector, and the input of the second differentiating chain is to the top of the logical element And, the second input is connected to the trigger output. Not a drawing shows one of the possible variants of the proposed digital playback device ui}) from the magnetic recording medium. The device contains information channels, each of which consists of input 1 and output 2 bus pulse information, the first 3 and second Ф of differentiating chains, a level detector 5, trigger 6 and logic element 7. In each information channel the input bus of information pulses 1 is connected to level detector 5, the output of which is connected to the input of the first differentiating chain 3. In addition, in each information channel, the first differentiating chain 3 is connected to the single input of trigger 6, the zero input of which is connected to about the second differential chain 4. The input of the second differentiating chain 4 in the recurrent information channel is connected to the output of the logic element I 7 connected to the output bus of information pulses 2. In this case, the first input of each logical epitome I 7 is connected to the output of the peak detector 8 of the synchronization channel, and the second input to the output of the trigger 6 of the same information channel. The peak detector 8 of the sync channel is connected between the input 9 and the output 10 bus clock. In the proposed device, the arrival of a pulse I1 of the information on a level 5 detector of any information channel results in the appearance of a resolving potential at the output of the corresponding trigger 6. This provides the appearance of a 7 pulse and} an output at the output of the logical element I 7 of the same information upon receipt. sync pulse peak detector 8 sync channel. The use of the invention makes it possible to reduce the error in the result of reproducing digital information. The device for reproducing digital information from a magnetic recording medium, containing information channels, each of which consists of an input bus of information pulses and a level detector connected to it and from an output bus of information pulses and a logic element I connected to it, the first input of which is connected to A sync kail detector, connected between the input and output sync pulse buses, is characterized in that, in order to reduce reproduction error, in Each information channel was entered by a trshter and connected to its single and zero inputs of the first and second differentiating chains, with the input of the first differentiating chain in each information channel connected to the output of the level detector, and the input of the second differentiating chain to the output of the logical element I, the second input which is connected to the trigger output. Sources of information taken into account in the examination 1. US Patent No. 3562723, cl. 340-174.1, pub. 1971. 2, Copyright Certificate CCCF No. 538391, cl. Q 11 V 5/02, 1975 (prototype).