SU1569878A1 - Device for digit magnetic recording - Google Patents

Abstract

The invention relates to magnetic recording devices and allows for an increase in recording density while ensuring self-synchronization. When writing, the information word is expanded by the shift register 13 from a sequential form into a parallel one and by means of elements 14, 15, 17 is converted into a code word, and then by the shift register 4 is again transformed into a sequential form. The code words are fed to a recording unit 8 for recording on a magnetic tape. The device uses Fibonacci channel codes to increase the recording density.

Description

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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 enhance the recording while maintaining the condition of self-synchronization.

Figure 1 presents the block diagram of the device; FIG. 2 shows time diagrams of the device operation.

The device contains a generator 1 connected by an output to the counting input of the second counter 2 pulses and the third counter 3 pulses. The output of counter 2 is connected to the synchronous input of the second shift register 4 and through the inverter 5 to the synchronous input of the second trigger 6 connected by an output to the control input of register 4, the output of which is connected to the counting input of the first trigger 7 connected by an inverted output to the information input of this trigger and the direct input is to block 8 of recording associated with magnetic media (not shown). The outputs of counter 3 are connected through an I 9 element to its reset input, when Ztom one of the outputs of counter 3 is connected via the first pulse counter U, the second inverter 11 and the driver 12 to the input of the trigger 6, as well as the synchronous input of the first shift register 13 connected via a static register 14 and a persistent storage device 15 (ROM) with the corresponding inputs of register 4. An input bus 16 is connected to the information input of the register 13. The corresponding outputs of the register 14 are connected via a digital comparator 17 to one of the regis inputs pa 4, wherein the other inputs of the comparator 17 are connected to the bus 18 of the reference signal.

The device works as follows.

The input binary signal is divided into uniform time sequences of ELEVATED BOTH Intervals, converted using channel Fibonacci codes into independent sequences, and then into the recording current. The clock signal generated by the generator 1 (Fig. 2a) is divided by 8 using counter 2 by 9 by means of counter 3 (Fig. 26 ib). Information signals in the binary code from the output of the register 13 are recorded in the register 14 at the time of a positive differential signal coming from the output of the inverter 11 (Fig. 2d). The output pulses of the driver 12 (Fig.2d) are fed to the installation input of the trigger 6, the output signal of which (Fig.2e) is fed to the installation input of the register 4 and sets the parallel recording or serial shift. In blocks 15 and 17, information 8 is encoded into 9. Register 4 produces a parallel write to the serial shift of the code information, which, after serialization, enters block 8 of the record.

Claims (1)

Invention Formula A digital magnetic recording device comprising a generator, an input bus connected to the information input of the first shift register, the outputs of which are connected to the information inputs of a static register, the first counting trigger whose output is connected to the input of the recording unit, the pulse shaper, the first pulse counter characterized by that, in order to increase the recording density while maintaining the condition of self-synchronization, a second pulse counter with division by 8 is entered into it, a counting input connected to the output g generator, the counter output is connected to the input of the first inverter and the synchronous input of the second shift register, the third pulse counter, a divider for 9, whose input is connected to the output of the generator, the outputs of which are connected to the corresponding inputs of the element And whose output is connected to the installation input of the third pulse counter, output which is connected to the sync input of the first shift register and to 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 synchronous input a static register and the input of the pulse generator, the output of which is connected to the installation input of the second counting trigger, whose counting input is connected to the output of the first inverter, while the output of the second counting trigger is connected to the installation input of the second the shift register, the output of which is connected to the counting input of the first counting trigger, and the inverse output to its information inputs, the outputs of the static register are connected to the corresponding inputs of the digital comparator and to the address inputs of the permanent storage device, the outputs of which are connected to the information inputs of the second shift register, bus reference signal connected to the input of the reference signal of the digital comparator, the output of which is connected to the information input of the second shift register.