SU1483482A1 - Device for multichannel magnetic recording and playback of pulse train - Google Patents

Abstract

The invention relates to the accumulation of information and can be used to determine the performance of objects, in particular, to record and play analog and time signals, as well as to obtain information about the number of signals and the operation time of the nodes. In order to increase the recording-reproducibility of information while increasing the information recording density on the tape by reducing the copier-effect noise, the device combines the input signals 38 in time with the formation of amplitude pulses using a linearly varying voltage generator 40 and in the playback channel the inverse conversion of the amplitude pulses into the original signals is performed. 2 Il.

Description

effect.

Figures 1 and 2 illustrate functional diagrams of the proposed device for multi-channel magnetic recording and reproduction of a sequence of pulses.

A device for multichannel magnetic recording and reproduction of a pulse train comprises a clock pulse generator 1, iodine output к to the input of the first distributor 2 pulses connected by outputs through a series of first pulse drivers 3 pulse-connected and an amplifier 4 clock pulses to the input of the magnetically recording unit 5, connected by an input with an output of an amplifier b of information pulses and coupled via a magnetic recording medium with a magnetic reproducing unit 7, connect you to exit to the clock inputs of the isolation unit 8, connected via the selector 9 to the time the first and second inputs of the second distributor 10 pulses and data pulses separation unit 11. An information pulse extraction unit I1 is connected by the output.

The input of the time selector 9. The latter contains the first element OR 28 connected by one input through the second one-shot 29 and the other input through the serial 1, the third one-shot 30 and the first delay element 31 to the output of the clock selection unit 8 and the output through the first inverter 32 to the first input of the first trigger 33 connected by the output to the first input of the second element AND 34 connected by the second input to the output of the clock extracting unit 8 and the output to the first input of the second distributor 10 pulses pulses. The device also contains a second inverter 35, a group of second shapers 36 and the third element And 37.

In addition, a device for multichannel magnetic recording and pulse playback contains a switch 38, the first inputs of which are connected to input buses 25, a first pulse counter 39 connected by an input to the output of the 3 clock pulse generator, a setting input to the last discharge output of the first distributor 2 pulses and output

via serially connected nep-viQ mi to the second inputs of the switch 38,

the first one-shot 12 and the first element And 13 to the same inputs of the first group of elements And 14 connected by other inputs to the outputs of the second distributor 10 pulses and outputs through serially connected first group of counters 15 pulses and the second group of elements And 1 b with the inputs of the first block 17 digital display , through the first group of single vibrators 18 connected in series, the group of elements OR 19, the second group of counters 20 pulses and the third group of elements 21 - with the inputs of the second digital display unit 22 and through sequentially the connected group of delay elements 23 and the second group of one-shot 24 - with the corresponding inputs of the ele

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and a linearly varying voltage generator 40 and a voltage comparator 41, the corresponding input of which is connected to the output of the switch 38 and to the input of the generator of linear voltage varying 40, the output of which is connected to the input of the information pulse amplifier, as well as a group of switches 42 the outputs of which are the outputs 43 of the device, the second and third elements OR 44 and 45, and the decoding block 46. The decoding unit 46 contains the fourth and fifth elements OR 47 and 48, the second trigger 49, the reference pulse generator 50, the fourth element AND 51 and the second counter 52 and the decoder 53 connected in series by the output

through a group of second pulse shapers 36 to one input of a group of switches 42. The other inputs of a group of switches 42 are connected to the outputs of the first group of elements AND 14, the third element OR 45 being connected between the output of the first inverter 32 and the first input of the first trigger 33 connected by the output to one of inputs of the third element OR 45 and the installation input to the control input of the temporary selector 9 and the first input of the second element OR 44 and through the second inverter 35 to the third input of the second element AND 34. The second pulse counter 52 under connected by the input to the output of the third element And 37, connected by inputs to the outputs of the generator 50 reference pulses and the second trigger 49, connected by outputs to the inputs of the fourth element And 51 connected by the output to the installation input of the second trigger 49 and the first input of the fifth element OR 48. Fifth element OR A8 is connected by an output to a setup input of a second pulse counter 52, a second input to a control input of a temporary selector 9 and a third input to interconnected control input of a decoder 53, an output of block 1 These information pulses and the first input of decoding unit 46 connected to the first input even of the input buses 25 time or g analog pulses arrive at the corresponding inputs of the analog switch 38. From the incoming clock pulses from the output of the generator 1 at the output of the counter 39 alternately

10 information binary codes appear that are bitwise supplied to the gate inputs of the analog switch 38 and, depending on the weight of the code, the input buses are switched.

15 25 to your exit. The appearance of the first, second, etc. clock pulses at the output of the distributor 2 and the commutation of the input buses 25 to the output of the switch 38 is carried out synchronously

20 This is necessary for the burn; in the intervals of the first, second g etc. tact pulses, pulses of the first, second, etc. input tires 25, respectively. Such synchronization is provided by the operation of the distributor 2, the counter 39 and the switch 38 of the analog signals from one generator 1.

From the output of the switch 38 in the time interval equal to the duration

The 30 clock pulses of the generator 1, the pulses of the analog signals are rarely fed to the inputs of the generator 40 of a linearly varying voltage and voltage comparator 41. So

In this way, the analog switch 38 of the OR element 47, connected by the second input to the second input of the decoding unit 46, connected to the output of the clock extraction unit 8. The fourth element OR 47 is connected by an output to the input of the second trigger 49, while the second element OR 44 is connected by an output to the second input of the second distributor 10 pulses.

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successively connects the input buses 25 to the inputs of the generator 40 linearly varying voltage and the comparator 41, converting the analog signals into discrete ones. The principle of converting discrete pulses by level and placing them on a time scale is as follows. When pulses arrive at the inputs of the generator 40 and the voltage comparator 41, a sawtooth voltage appears at the output of the generator 40, which is applied to one input of the comparator 41, at which time there is a voltage equal to the sum of the reference voltage at the other input of the comparator 41 voltage and convertible voltage. At the moment of equality of the voltage of the generator 40 and the measured voltage at the output of the comparator 41, a pulse appears, and the greater the level of the measured pulse, the more time is spent for the appearance of the pulse at the output of the comparator 41,

The device works as follows.

When recording the clock pulses come from the output of the generator 1 to the inputs of the distributor 2 and the counter 39 pulses and starts them. From the output of the distributor 2 pulses in turn arrive at the inputs of the formers of 3 pulses, which at the output form short pulses. From the output of the formers 3, the pulses arrive through the amplifier 4 clock pulses and after amplifying the latter, write 834826

with one polarity in the magnetically recording unit 5.

From the input bus 25 time or g analog pulses arrive at the corresponding inputs of the analog switch 38. From the incoming clock pulses from the output of the generator 1 at the output of the counter 39 alternately

10 information binary codes appear that are bitwise supplied to the gate inputs of the analog switch 38 and, depending on the weight of the code, the input buses are switched.

15 25 to your exit. The appearance of the first, second, etc. clock pulses at the output of the distributor 2 and the switching of the input buses 25 to the output of the switch 38 is carried out synchronously.

20 This is necessary for the burn; in the intervals of the first, second g etc. clock pulses, pulses of the first, second, etc. input tires 25, respectively. Such synchronization is provided by the operation of the distributor 2, the counter 39 and the switch 38 of the analog signals from one generator 1.

From the output of the switch 38 in the time interval equal to the duration

The 30 clock pulses of the generator 1, the pulses of the analog signals are rarely fed to the inputs of the generator 40 of a linearly varying voltage and voltage comparator 41. So

the analog switch 38

successively connects the input buses 25 to the inputs of the generator 40 linearly varying voltage and the comparator 41, converting the analog signals into discrete ones. The principle of converting discrete pulses by level and placing them on the time scale is as follows. When pulses arrive at the inputs of the generator 40 and the voltage comparator 41, a sawtooth voltage appears at the output of the generator 40, which is fed to one input of the comparator 41, during which time the voltage at the other input of the comparator 41 is equal to the sum of the reference voltage and convertible voltage. At the moment of equality of the voltage of the generator 40 and the measured voltage at the output of the comparator 41, a pulse appears, and the greater the level of the measured pulse, the more time is spent for the appearance of the pulse at the output of the comparator 41,

In other words, the time of appearance of the pulse on the output of the comparator 41 is proportional to the level of the converted pulse. The information output 5 received from the output of the comparator 41 is preamplified and recorded with a different sequence in the recording unit 5. The greater the level of the converted pulse, the greater the distance between the clock and -1 the information pulse. In addition, the pulse conversion allows the counter 39 and the analog signal switch 38 to be reset to the initial state after the end of each cycle of operation,

The playback channel of the device operates as follows: From the output of block 7, it reproduces the clock 20 and information pulse; arrive at the inputs of blocks 8 and 1 of the ejection of IIH-I-formation and clock pulses. The selected clock pulses simultaneously arrive at the inputs of the temporal 25 selector 9 clock pulses and to the input of the decoding unit 46.

The principle of operation of the time selector circuit 9 clock pulses is as follows. The pulses received from the output of the block 8 of the clock pulses simultaneously arrive at the inputs of the one-shot 29 and 30, the delay element 31 and the input element I 34. The one-shot 29 starts from the incoming clock pulse and produces a pulse with a certain duration arrives at the input element of the element OR 28, Clock pulses arriving at the input, Q of the element And 31 delays, shifted in time, arrive at the input of the odiovibrator 30 and start it. The mononibrator 30 also produces pulses of a certain duration, which arrive at the input of the OR element — 28. The total pulse duration produced by the one-oscillators 29 and 30 is equal to the repetition period between clock pulses. Thus, if the repetition period between clock pulses is less than or equal to the specified one, a temporary pulse appears at the output of OR 28, the duration of which is equal to the total repetition code time between clock pulses. If the repetition periods between clock pulses are greater than the specified one, then at the output of OR 28 is35

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a temporary pulse, which means the end of a series of clock pulses, results in the logical 1 appearing at the output of the HE 32 element, which serves as a reset pulse for the pulse distributor 0, preparing it for receiving the first clock pulse. At the same time, from the output of the HE element 32, the pulses arrive through the element OR 45 at the input of the trigger 33,

During playback of clock and information pulses as a result of incorrect installation of the magnetic tape or due to the impossibility of recording information from the first clock pulse, information may not be read off from the first clock (information) pulse. and on the other (any), then when reading the information an error occurs, i.e. the information corresponding to the first channel can enter any other channel. Such an error has a significant impact on the number of cycles of operation of the nodes. To eliminate this error, you must skip (reset) the first series of clock and information pulses. The task can be solved by the prohibition of the reception of the first series of information pulses. The trigger 33 is triggered from the falling edge of the incoming pulse, and in the initial state at the output of the HE 32 and OR 45 elements there is a logical 1. At the output of the trigger 33, pulse 1 appears after the pulse disappears at the outputs of the OR 45 and HE 32 elements and is subsequently held regardless of the pulse change at the output of the HE element 32, since at the first input of the OR element 45 a logical lls is kept from the trigger 33 itself. Thus, after the first series of clock and information pulses, the logical 1 appears at the output of the trigger 33, which blunt to the first inputs of AND 34 and AND 13 and is held until a manual reset. The beginning of this time pulse is a command that permits AND 34 and 13 elements to skip the clock and data pulses for reading, since at this time the output of the HE 35 element is logical 1 (at the output of the HE 35 logical O appears only

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yes, when manual reset of trigger 33 and distributor IOJ is performed. Since at this time the clock pulses arrive at the input of the element I 34, t after the appearance at the first input of the element 34 of the logical I 1 the clock pulses begin to flow into the input of the distributor 10. From the incoming clock pulses at the outputs of the distributor 10 pulses alternately appear which arrive at the other inputs of the first group of 14 elements AND,

Information pulses from the output of block 11 of the information pulses are fed to the input of the single-oscillator 12, at the output of which pulses whose duration is longer than the duration of the input pulse are pulsed. In this case, the matching of the corresponding clock information pulses is ensured, and their binding is created as a result of the synchronization pause formed between n-1 and the first clock pulses. From the output of the one-cycle 12, information pulses, extended in duration, arrive at other inputs of the first group of 14 elements AND At the output of element II 13, information pulses appear only when logic 1 appears at the output of trigger 33. Since the information pulses are written next to with its own clock pulses, then when the first clock pulse appears, at the first output of the distributor 10 at the output of the first element AND of the first group of 14 elements AND the first information pulse appears. Then these are decoded e and consecutive information pulses arrive at the corresponding inputs of the node operation time counter 15 and bitwise accumulate until the end of the processing of the magnetic tape.

If the repetition periods between clock pulses are equal to or less than the specified ones, there is a logical 1 at the output of the HE element 32 50, causing the dispenser 10 pulses to its original state. Thus, after each n-1 pulse, the pulse distributor 50 starts counting from the first 55 clock pulse. Using elements 18-21, 23 and 24, the repetition periods of the corresponding information pulses are found, 10

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D1HSO in the next series with the given. At the same time, if the periods of the gotov, for example, the information pulses of the first channel, located in the adjacent series, are equal to or equal to: predetermined, then the single vibrators 18 to 24 produce pulses, the total duration of which is sufficient df continuous retention ps-element OR 19 logical that corresponds to the included state (work cycle) of the monitored object node. Otherwise, the logical element 1 disappears at the output of the element OR 19, which means the end of operation of the nodes. Thus, depending on the incoming information pulses at the output of the element OR 19 soil, the time pulses correspond to the number of cycles of operation of the nodes, which are stored by the counters 20 pulses until the end of the processing of the magnetic tape. After finishing the processing of the magnetic tape by pressing the corresponding keys 27 on the digital display unit 22, you can get information about the number of cycles and the operation time of the object nodes.

The principle of operation of amplitude pulse decoding unit 46 and restoring (decoding) the shape of the original signals is as follows. From the output of the highlighters 11 and 8 information and clock pulses, the selected clock and information pulses also arrive at the first and second inputs of the OR element 47 of the amplitude pulse decoding unit 46, respectively. Since the clock pulses always arrive earlier than the information pulses, upon receipt of the clock pulse, the trigger 49 switches and always on its forward output appears logical 1, which is fed to the second input of the element 37. Since at that time the first input of the element 37 is impulses from generator 50 are received, these pulses of elements AND 37 are passed to the input of counter 52. Element I 37 continues to pass a series of pulses of generator 50 until logical 1 disappears at output of trigger 49, Logical 1 at output three The game 49 disappears in two cases: if, after the clock pulses, an information pulse arrives at the trigger input and if the counter 52 overflows from a series of incoming pulses (this happens when there is no information pulse). Since the information pulses are placed on a time scale when they appear at the input of the trigger 49, they depend on time. Otherwise, the greater the distance between the clock and information pulses, the more open the element And 37, which is omitted. A large number of pulses. Or vice versa, the smaller the distance between clock and information pulses, the smaller the number of pulses passed by element AND 37 to the input of counter 52. Thus, from input clock pulse, element And 37 opens, and from information pulse, it is locked. The number of transmitted pulses is proportional to the level of pulses recorded (reproducible) on a time scale.

Counter 52 counts the number of consecutively received series of pulses, converts them into a normal binary code. From the output of counter 52, parallel binary codes, the weight of which is proportional to the level of recorded (reproduced) pulses on a time scale, arrive at the corresponding inputs of the decoder 53. The latter accepts and converts these codes into sequential decimal codes only when its gate input information pulse. The information pulse on the one hand permits the decoder 53 to decrypt the information supplied to its input, on the other hand resets the information recorded in the counter 52, preparing it to receive the next series of pulses. If there are no information pulses between the clock pulses, then the information available at the outputs of counter 52 is not received by the decoder 53. In the absence of an information pulse between the clock pulses, the pulse counter replenishes from the series of incoming pulses, as a result of which is a logical 1, causing the trigger 49 in the counter 52 to the initial state. Trigger 49 and counter 52 open from the next clock pulse.

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From the output of the decoder 53, decimal codes corresponding to the level of pulses through a group of 36 drivers are amplified to a value proportional to the value of the decimal code. From the output of a group of 36 drivers, amplified amplitude pulses arrive at one input of all channel analog switches 42. The decoding of amplitude pulses through channels is performed as follows. Since information pulses are recorded in the interval of their own and neighboring clock pulses, when the first clock pulse appears at the first output of the distributor 10, the first information pulse of the first element I of the AND 14 element group appears, which is fed to the second input of the first switch of group 42 analog switches. At this moment, an amplitude pulse (recorded in the interval of the first and second clock pulse) appears from the outputs of the group 36 of amplitude pulse generators, which is fed to the first inputs of the group of channel analog switches 42. Since at this moment there is a logical 1 the input of the first analog switch group of switches 42, then the first amplitude pulse appears at its output. At the output of the first switch of the group 42 of analog switches, information pulses appear, which are located in the interval of the first and second clock pulses of all adjacent series of information pulses. At the output of the second switchboard of a group of 42 analogue switches, information amplitude pulses appear, located in the interval of the second and third pulses of all adjacent series of information pulses, etc. From the output of the switches of the group 42 of analog switches, the pulses are output to the output buses 43.

Claims (1)

Invention Formula A device for multichannel magnetic recording and playback of a pulse train, comprising a clock pulse generator connected by an output to an input of a first pulse distributor connected by outputs through series-connected groups of first pulse shapers and an amplifier of clock pulses to an input of a magnetic recording unit connected to the output an amplifier of information pulses and interfaced through a magnetic recording medium with a magnetic reproduction unit connected output to the inputs of the clock selection unit connected via a temporary selector to the first and second inputs of the second pulse distributor and information pulse selection unit connected by an output through the first single vibrator and the first element I serially connected to one input of the first group of elements And connected by other inputs with the outputs of the second pulse distributor and the outputs through the first group of pulse counters connected in series and the second group of elements AND with the inputs of the first about a digital information block through a serially connected first group of one-vibration, a group of elements OR, a second group of pulse counters and a third group of elements AND with inputs of a second block of digital information and through series-connected group of delay elements into a second group of one-vibrators with corresponding inputs of a group of elements OR, as well as input buses and a key block, connected by outputs to the corresponding inputs of the second and third groups of AND elements and connected by a corresponding output to the connected between each other, the setup inputs of the first and second groups of pulse counters and the control input of the time selector containing the first OR element connected by one input through the second single vibrator, the other input through the third one-channel vibrator and the first delay element to the output of the block the selection of clock pulses and the output through the first inverter to the first input of the first trigger connected by the output to the first input of the second element And connected by the second input to the output of the allocation unit clock and pulse output to a first input of the second pulse distributor, and comprising a second inverter, the second group formi0 five 0 five 0 five 0 five 0 five pulsers and grpn element I, O tl and h a n a p y s with the fact that, in order to increase the informativity of recording-reproduction with increasing recording density by reducing the effect of copier-effect noise, a switch is introduced into it , the first inputs of which are connected to the input buses, the first pulse counter connected by the input to the output of the clock pulse generator, installing the input to the output of the last bit of the first pulse distributor, and the outputs to the second inputs of the switch, and serially connected line generator Voltage varying voltage and voltage comparator, the corresponding input of which is connected to the output of the switch and to the generator input of a linearly varying voltage, the output of which is connected to the input of the information pulse amplifier, as well as a group of switches, the outputs of which are outputs of the device, the third OR element and the decoding unit containing the fourth and fifth elements OR, the second trigger, the reference pulse generator, the fourth AND element and the second pulse counter in series the encoder connected to the output through a group of second pulse formers to one input of a group of switches connected by other inputs to the outputs of the first group of elements AND, and the third element OR is connected between the output of the first inverter and the first input of the first trigger connected by the output to one of the inputs of the third element OR and the installation input to the control input of the time selector on the first input of the second element OR and through the second inverter to the third input of the second element AND, the second pulse counter. The input to the output of the third element AND connected to the outputs of the generator of the reference pulses and the second trigger is connected to the inputs of the fourth element AND connected to the installation input of the second trigger and the first input of the fifth OR element connected to the input of the second counter pulses, the second input with the control input of the time selector and the third input with interconnected 51 the control input of the decoder, the output of the information pulse extraction unit and the first input of the decoding unit connected to the first input of the fourth OR element connected by the second input to the second input of the decoding unit are connected HRO o-chr oqp 3482 sixteen with the output of the clock extraction unit and the output connected to the input of the second trigger, while the second OR element is connected by the output to the second input of the second pulse distributor. 1 27} I / 7 I