SU1674232A1 - Digital magnetic recorder - Google Patents

Abstract

The invention relates to magnetic recording devices and allows for enhanced dense recording while maintaining self-synchronization. When writing, the information word is expanded by the shift register 15 from a sequential form into a parallel one and by means of elements 16, 17 of the control circuit built on elements 1, 2, 3, 5, 10, 11, 12, 13, 8, 14, 7 is converted into a code word and then the shift register 4 is serialized again. The code words are fed to a recording unit 10 for recording on a magnetic tape. The device uses Fibonacci channel codes to increase the recording density.

Description

The invention relates to the field of information storage, in particular to devices for high-density magnetic recording.

The aim of the invention is to increase the recording density of information while maintaining the condition of self-synchronization.

FIG. 1 is a block diagram of a device for high-density digital magnetic recording; in fig. 2 - timing charts of the device.

The device contains a generator 1, the second counter 2 pulses, the third counter 3 pulses, the second shift register 4, the first element And 5, the first inverter 6, the second counting trigger 7, the third element And 8, the first counting trigger 9, block 10 records, the first counter 11 pulses, second element 12, second inverter 13, driver 14, first shift register 15, parallel register 16, read-only memory 17, input bus 18, connected in a certain way.

The device works as follows.

The clock frequency generated by the generator 1 (Fig. 2a) simultaneously arrives at the counting input of counter 3, dividing by 9 (Fig. 26) and at the counting input of the third counter 3 of the divider by 10 (Fig. 2c), from the output of which the signal goes The counting input of counter 11 and the synchronizing input of register 15. The binary signal from the output bus 18 enters the information input of register 15 and is recorded from it into register 16 at the time of a positive differential from the output of inverter 13 (Fig. 2d). From the output of the inverter 13, the pulses through the shaper 14 (Fig. 2d) are fed to the setup input of the trigger 7, the output of which (Fig. 2e) is connected to the control input of the second register 4, and a parallel recording or a serial shift is set. From the output of the register 16, the information signal is fed to the address

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Claims (1)

input of the persistent storage device 17. In this block, information 9 to 10 is encoded. The encoded information signal is fed to the information inputs of register 4. which performs parallel recording and serial shift of the code information that goes to one of the inputs of the And 8 element, from the output which comes through the trigger 9 on the block 10 entries. The invention The device for digital magnetic recording, containing an input bus connected to the information input of the first shift register, the outputs of which are connected to the information inputs of the parallel register, the outputs of which are connected to the address inputs of a permanent storage device, the outputs of which are connected to the information inputs of the second shift register, the first counting trigger, the inverse output of which is connected to the information input, the direct output to the input of the recording unit, the second impu counter sov, counting input connected to the generator output and the output - to the first inverter and the timing input of the second shift register, the third pulse count input which is connected to the generator output, and the output to the synchronization input of the first shift register and the counting input of the first pulse counter, the output of which is connected to the input of the second inverter, the output of which is connected to the synchronizing input of the parallel register and the input of the pulse shaper, the output of which is connected to the installation input the second counting trigger, the counting input of which is connected to the output of the first inverter, and the output - to the installation input of the second shift register, the first element I. characterized in that, with in order to increase the recording density while maintaining the condition of self-synchronization, the second element I is entered into it, the inputs of which are connected to the corresponding outputs of the first pulse counter, The installation input of which is connected to the output of the second element I, the third element I, the first input of which is connected to the first inverter, the second input to the output of the second shift register, and the output to the counting the input of the first counting trigger, the outputs of the second pulse counter connected to the corresponding inputs of the first element And the output of which is connected to the installation input of the second pulse counter. J WITH Z "SI I  B "and