SU1270787A2 - Device for performing digital magnetic recording - Google Patents

Abstract

The invention relates to magnetic recording and allows increasing the recording density by group coding of information. The signals from the outputs of the counter 4 pulses and from the outputs of the static register 6 arrive at the address inputs of the memory block 5, the information from the cells of the last block is read by the sync pulses. The output signal from the unit flip-flop 11 is fed to one of the inputs of the static register 6. The pulse shaper 8 produces short pulses that are mixed on the OR 7 element with the signal taken from one of the generator 1 outputs, as a result, a control signal is generated. The counting trigger 9 converts one of the signals from the memory block 5 into a recording signal supplied to the magnetic recording block 10. The recording signal has a structure that allows one to achieve the purpose of the invention, which is additionally (Ref. To auth. No. 1113845. 1 tab., 2 ill.

Description

to :) m about -j

00

Nl

tso

The invention retracts to magnetic recording and goes to digital magnetic recording devices.

The purpose of the invention is to increase the recording density by group coding of information.

Fig. I shows a functional-on-device diagram for digital magnetic recording; FIG. 2 shows temporary diagrams that explain his work.

The device for digital magnetic recording contains a master oscillator 1S, the first output of which is connected to the clock input of the shift register 2 whose information input is connected to the input information bus 3 3 and the second generator code 1 is connected to the counter input of the counter. 4 pulses and to the control input of the memory block 5 connected by address inputs to the outputs of the counter 4 pulses and the static register 6 ,, connected by the information input w to the outputs of the shift register 2 and the synchronization input is compatible with the zero setting input of the counter 4 pulses to the output of the element OR 7, to one of the inputs of which the third output of the generator 1 is connected; and to the other, the output of the driver 8 1: the pulsator connected to the first output of the memory 5, the second output of which through Tel'nykh vklyuchenny counting trigger 9 is connected to the magnetic recording unit 10

In addition, the device for digital magnetic recording contains an additional trigger connected to the installation inputs to the additional outputs of the memory block 5 and with the WCECO to one of the inputs of the static register 6 "

The device works as follows.

The input information signaling, in which information units correspond to a high voltage level, and informational zeroes, a low level, comes from bus 3 to the information input of the shift register 2. The clock pulse sequence and I15 produced by the master oscillator 1 are synchronized to the input of the shift register 2. Signals from the outputs of the shift register 2 are transmitted to the static register 5 by the control signal and 7 generated at the output of the element OR 7, the control signal and 7 is a pulse s indicating the boundaries of the groups to which the input information sequence is broken. At the same time, the W-pulses and 7 translate the counter of 4 pulses into the zero state. Sync pulses are sent to the counting input of the counter of 4 pulses and 12 with a frequency of 3/2 times the clock frequency, taken from another output of the generator 1, the clock pulses and 12 start

5 to be generated by the generator 1 after the occurrence of the signal U 13 taken from the third output of the generator 1 and indicating the beginning of the conversion of the input information binary sequence.

The signals of both 41, and 42, and 43 from the outputs of the counter of 4 pulses and the signals from the outputs of the static register 6 are fed to the address inputs of the memory block 5. Information is read from the cells of memory 5 by sync pulses and 12, while the output Q, j of memory 5 forms a 0 signal and 5 that defines the boundaries of the groups into which the input information sequence is divided, and the output Q- a signal is generated and 52, which represents a co5 battle of the recoded information sequence: 01 XOO Ш 010 1 Х10

0 0001 HOO 001 0010 HOO 000 OOP 010. 00 0000 010 000

3 In order to remember the state of the last bit of the previous group, an additional trigger 11 is used, which is controlled by the signals and 53 and 54 formed on

0 outputs Q and Q of memory block 5. Output, signal and 11 from a single output of the trigger 11 is fed to one of the inputs of the statistical register 6. From the rear edges of the signal U 51 with

5 using a pulse shaper 8, short pulses are generated and 8 that are mixed on the element of the school 7 with the U 13 signal, resulting in a control signal and 7. The signal and 52 are converted by the counting trigger 9 into the recording signal and 9, which is fed to the magnetic block 10 records The recording signal has a structure that allows for greater information recording density than that of the prototype, while maintaining reliable self-synchronization, and, moreover, obtaining a higher noise immunity than that of the prototype.

1000 11 1 1 О О 1001

and ,, lg1gt

// JLJIJUULJIJIJLJIJ P

fie.2 7 of the invention. Formula A device for digital magnetic recording according to the author. St. No. 1113845, characterized in that, in order to increase the recording density by group coding of information, an additional trigger is inserted in it, connected by setup inputs to the additional outputs of the memory block, and output to one of the inputs of the static register.

Claims (1)

Claim A device for digital magnetic recording by ed. St. No. 1113845, about 5, characterized in that, in order to increase the recording density by group encoding information, an additional trigger is inserted into it, connected by the installation 10 inputs to the additional outputs of the memory unit, and the output to one of the inputs of the static register. ______ D I ____ GT ____ gt_ b13 ----------- P _______________________________