SU1210134A1 - Device for magnetic recording-reproducing of digital information - Google Patents

Abstract

This invention relates to magnetic recording and reproducing digital information devices. The device contains a shift register 1, an information signal input bus 2, triggers 3, 6, one-shot 4, 5, 10 and 11, a decoder 7, a recording-playback node 8, a playback amplifier 9, AND NOT elements 12, 14 and 15, a counter 13, AND element 16, shift register 17, decoder 18, pulse generator 19, control signal input bus 20, clock pulse generator 21, information signal output bus 22, control signal output bus 23, control signal output shaper 24 with control signal output bus 25 , the driver 26 of the recording signal (providing yuschy parallel entry in the information shift register 1) interconnected by a certain way, which allows to increase the accuracy of the magnetic recording-reproducing digital information. 1 il. i (L 1c with

Description

The invention relates to the field of magnetic recording, in particular, to devices for magnetic recording-reproduction of digital information.

The aim of the invention is to improve the accuracy of magnetic recording-reproducing digital information.

The drawing shows one of the possible variants of the proposed device for magnetic recording-reproduction of digital information.

The device contains a shift register 1, the first input of which is connected to the input bus 2 of the information signal, the first trigger 3 connected by the outputs to the inputs of the first and second one-shot 4 and 5, the second trigger 6 and the decoder 7. The output of the second trigger 6 is connected to the input of the recording unit 8 - reproduction, for example, a household tape recorder, the output of which is connected to the input of the playback amplifier 9 connected by the outputs to the inputs of the third and fourth one-shot 10 and 11

The device also contains the first element AND-NO 12 connected by the output to the input of the second trigger 6 and connected by the first input to the output of the first one-1 vibrator 4 connected to the first input of the shift register 1 and the first input of the counter 13, the second and third elements AND-NOT 14 and 15, element 16, additional shift register 17 and additional decoder 18 The second element NOT 14 is connected by a first input to the output of the second odiovibrator 5 and is connected by a second input to the output of the shift register 1. The third element AND-NOT S5 is connected by inputs to the outputs of the third and fourth one-shot and connected by an output to the input of the imaging unit 19 pulses. The element 16 is connected by the output to the second input of the counter 13 and is connected by the first input to the input bus 20 of the control signal connected via a clock generator 21 to the input of the first trigger 3. An additional shift register 17 is connected to the output signal bus 22 and connected to the first input to the output of the former 19 pulses. An additional decoder 18 is connected by an output to the output bus 23 of the control signal. The output of the counter 13 is connected to the input of the decoder 7, the output of which is connected via the read signal generator 24 to the additional output bus 25 of the control signal and connected to the third input of the shift register 1 and to the input of the write signal generator 26. The output of the write signal generator 26 is connected to the fourth input of the shift register 1 and connected to the second input of the AND 16 element. The output of the second element AND-NOT 14 is connected to the second input of the first AND element — NOT 12. The output of the third AND-NE element 5 is connected to the second the input of the additional register 17 of the shift connected by the second output to the input of the additional decoder 18.

The device for magnetic recording-reproducing digital information operates as follows.

In the process of recording from the signal received via the control signal input bus 20, the clock pulse generator 21 acts on the first trigger 3.

0 On the leading edges of the pulses of the first trigger 3, the first and second single-shot 4 and 5 are activated, affecting the counter 13 and the shift register 1. When this is shifted in the shift register 1, information bitwise arrives at the second AND element — NOT 14. After filling the counter with 13 with a number corresponding to the number of bits of shift register 1, the decoder 7 generates a signal affecting the write signal generator 26. Shaper 26

0 write signals provide parallel entry in the register 1 of the shift information received on the input bus 2 signal information. If a logical zero level arrives from the output of the shift register to the second element IS 14, the second trigger 6 is switched only by pulses of the first one-shot 4. If the level of the logical unit arrives from the output of the shift register 1, the second trigger 6 switches as the pulses of the first single vibrator 4 and pulses of the second one-shot 5. The signal from the output of the second flip-flop 6 is fed to the node 8 recording-playback.

In the course of reproduction, the reproduction result from the recording-reproducing unit 8 is fed to the reproduction amplifier 9, acting in antiphase on the third and fourth one-shot 10 and 11. The third and fourth one-shot 10 and 11 reduce the influence of the distortion of the result of reproduction and shape it

0 strictly rectangular pulses of a given duration. The pulses of the third and fourth one-shot 10 and 11 are fed to the third element AND-NO 15, which forms a sequence of pulses characterizing digital information. The third element AND - NOT 15 through the shaper 19 pulses and directly affects the additional register 17 shift. The additional shift register 17 acts on the additional decoder 18, which divides the control signal to the control signal output bus 23. An additional shift register 17 generates an information signal supplied to the information signal output bus 22.

Claims (1)

5 Formula of Invention Magnetic recording-reproducing device for digital information, co0 holding the shift register, the first input of which is connected to the information signal input bus, the first trigger connected by the outputs to the inputs of the first and second single vibrators, the second trigger connected to the input of the recording-playback node, the output of which is connected to the input of the playback amplifier connected to the inputs the third and fourth one-shot, decoder, counter, pulse shaper, write driver, clock driver, input bus control signal ti output bus information signal and control signal, characterized in that, in order to increase the recording density of digital information, the first element AND-NOT connected to the input of the second trigger and connected to the output of the first single-oscillator connected to the second input of the shift register and with the first input of the counter, connected by the output to the input of the decoder, the output of which is connected to the third input of the shift register and to the input of the writing signal generator, the second AND-NOT element connected by the first input to the output of the second one-shot and connected by the second input to the output of the shift register, the third element AND-NOT connected by the inputs to the outputs of the third and fourth one-shot and connected by the output to the input of the pulse former, the element And connected by the output to the second input of the counter and connected by the first input to the input control signal bus connected via driver clock pulses with the input of the first trigger, an additional shift register connected by the first output to the output bus of the information signal and connected by the first input to the output of the pulse driver, and an additional decoder connected by the output to the input bus of the control signal, the output of the write signal generator connected to the fourth register input shift and connected to the second input element And the output of the second the NAND element is connected to the first input of the NAND element, and the output of the third NAND element is connected to the second input of the additional shift register connected by the second output to the input of the additional decoder.