SU1256087A1 - Device for digital magnetic recording - Google Patents

Abstract

The invention relates to the accumulation of information and makes it possible to increase the reliability of the device. When the storage device 4 on the magnetic tape goes into the unsuitable state, the input level of the element 16 is fed to a high level. According to the polling signal received via the polling bus 19, the element 16 forms a signal supplied to the triggers 17 and 18, to the elements Y and Y and 12 and to the distributor 15. The trigger 17 switches to a single state, which ensures the selection of the accumulator 5, and trigger 18 and valve 15 are reset. If the reading is made from memory block 2, then the element YYLY 12 is opened by a signal from the driver of 6 signals. The signal of the element and 16 through the element IS-NOT 12 and the element and 10 resets the counter 14 to the initial state. The signal of the signal generator 6 again starts the distributor 15, setting the trigger 18 and allowing the operation of the pulse generator 8. Again, all information is recorded from memory block 2 to drive 5, which eliminates the loss of information. 1 il. ((L Is :) ate od about 00

Description

The invention relates to the accumulation of information, namely, devices for digital magnetic recording.

The purpose of the invention is to increase the reliability of a digital magnetic recording device.

The drawing shows the proposed device for digital magnetic recording.

The device contains the first and second blocks 1 and 2 of memory, connected by information inputs to input information buses 3 and connected by outputs to information inputs of a recording unit made in the form of first and second drives 4 and 5 on a magnetic tape, l driver 6 of control signals reading, connected to the input control bus 7 and to the first output of the generator 8 pulses.

The device also contains a cervical element AND 9, a second element AND 10, a first element AND-NOT 11 and a first element AND-NO 12 connected by the first inputs to the generator 6 of the write-read control signals, the first and second counters 13 and 14 connected by the first outputs to the address inputs of the first and second blocks 1 and 2 of memory, respectively, the distributor 15 connected by the first output to the input of the generator 8 pulses, the third element AND 16 and the first and second triggers 17 and 18. The third element AND 16 is provided with an interrogation input bus 19 connected with his first entrance ohm, and a second input connected to the output recording block sovpadayush, outputs them to the first and second storage devices 4 and 5 on the magnetic tape. The output of the third element And 16 is connected to the inputs of the first and second elements AND-NOT 11 and 12, to the input of the first trigger 17, to the first input of the second trigger 8 and to the first input of the distributor 15. The second output and the second and third inputs of the distributor are connected to the driver 6 read-write control signals connected to the first inputs and to the second outputs of the first and second counters 13 and 14. The second inputs of the first and second counters 13 and 14 are connected to the outputs of the first and second elements 9 and 10, respectively, connected by second inputs from the output The inputs of the first and second elements are AND-NAND and 12. The third and fourth outputs of the distributor 15 are connected to the second and third inputs of the second trigger 18, which is connected to the first and second drives 4 and 5 on the magnetic tape, which connected by second control inputs to the second output of the generator 8 pulses and connected by third control inputs to the inverse and direct outputs of the first trigger 17, respectively.

Digital magnetic recording using the proposed device is as follows.

The information to be written on the g input information buses 3 is fed to the first and second blocks 1 and 2 of the memory, and the accompanying clock on the input control bar 7 to the driver 6 of the write-control signals. A read / write control signal generator 6 generates a signal arriving at the first memory block 1, which ensures that information is written to it. Consequently, the driver 6 write control signals

5 generates a signal applied to the first input of the first counter 13, providing a change in its state by one. When the first block 1 of memory is filled, the first counter 13 generates a signal arriving at the write-read control generator 6 that generates a negative signal applied to the first element 9 and causes the first counter 13 to reset to its initial state. If the second memory block 2 is free,

5, the second counter 14 is reset and the information is recorded in the second memory block 2 in the same way as in the first memory block 1, but using the second And 10 element and the second counter 14.

Shaper 6 control signals

0 write-read generates a signal that ensures that the first memory block 1 effects the first tape drive 4, selected by the first trigger 17, and the signal that triggers the distributor 15. The valve 15 sets the second trigger 18 and resolves with some delay work of the generator of 8 impulses. The signal from the second trigger 18 begins the movement of the magnetic tape in the first drive 4 to

0 on the magnetic tape, and according to the signals from the pulse generator 8, information is recorded into it from the first memory block 1. In this case, the signals from the pulse generator 8 are fed to the driver 6 of the write-control signals, which

 produces signals that change the state of the first counter 13. When reading from the first memory block 1 the entire array of information recorded previously, the first counter 13 generates a signal arriving at

Q shaper 6 write-read control signals generating a signal applied to the valve 15. The valve 15 disables the operation of the pulse generator 8 and resets the second trigger 18 stopping the movement of the magnetic tape in the first drive 4 on the magnetic tape.

When the second memory block 2 is filled, the shaper 6 of the write-read control signals on the signal of the second counter 14 generates a negative signal arriving at the second element I 10 and resetting the second counter 14 through its initial state. If the first memory block 1 is free, the shaper 6 of the read / write control signals resets the first counter 13, after which information is recorded in the first memory block 1.

The read-write control signal generator 6 generates a signal arriving at the second memory block 2, which ensures that the latter acts on the first tape drive 4. The generator of the read-write control signals b also starts the distributor 15, which sets the second trigger 18 and enables the operation of the pulse generator 8. According to the signals of the pulse generator 8, a record is recorded in the first drive 4 on a magnetic tape of information read from the second memory block 2.

When the first storage device 4 on the magnetic tape goes into a state of disrepair, a high level is applied to the second input of the third element 16. According to the polling signal received at the polling input bus 19, the third element AND 16 generates a signal supplied to the first and second triggers 17 and 18, to the first and second elements AND-NOT 11 and 12 and to the distributor 15. The first trigger 17 switches to one a state providing selection of the second accumulator 5 on a magnetic tape, and the second trigger 18 and the distributor 15 are reset. If the information is read out from the second memory block 2, the second element IS-NOT 12 is opened by a signal from the imager 6 of the read / write control signals. At the same time, the signal of the third element AND 16 through the second element IS-HEN 12 and the second element AND 10 resets the second counter 14 to the initial state. The signal of the generator of read-write control signals 6 again starts the distributor 15, which sets the second trigger 18 and enables the operation of the pulse generator 8. Thus, the entire information array from the second memory block 2 is again recorded in the second magnetic tape drive 5, thereby eliminating information losses.

Claims (1)

The claims of the device for digital magnetic 5 records containing the first and second memory blocks, connected by information inputs to the input information skins and connected by outputs to the information inputs of the recording unit, and the driver Q write-read control signals connected to the input control bus and to the first output of the pulse generator, characterized in that, in order to increase reliability in operation, the first AND element, the second AND element, and the the second element is NOT connected with the first inputs to the generator of the read-write control signals, the first and second counters connected by the first outputs to the address inputs Q, respectively, of the first and second memory blocks, the distributor connected by the first output to the input of the pulse generator, the third element I, equipped with the input interrogation bus connected to its first input, and connected by the second input to the outputs of the recording unit made in the form of the first and second tape drives, and the first and second triggers, with the output of the third element AND connected to the inputs of the first and second elements AND-NOT, to the input of the first trigger, to the first input of the second trigger and to the first input of the distributor, Connected by the second output and the second and third inputs with a write-read control signal generator connected to the first inputs and second outputs of the first and second counters, the second inputs of which are connected to the outputs of the first and second elements, respectively, connected by the second inputs to the outputs of the first and second elements NAND, and the third and fourth outputs of the distributor are connected to the second and third inputs of the second trigger connected to the output of the first control inputs of the first and second Tape drives, which are connected by the second control inputs to the second output of the pulse generator and connected by the third control inputs to the inverse and forward outputs of the first trigger, respectively. 0 0