SU873274A1

SU873274A1 - Device for reproducing digital data from multi-track magnetic medium

Info

Publication number: SU873274A1
Application number: SU792849465A
Authority: SU
Inventors: Альберт Константинович Смирнов; Сергей Семенович Шульгин
Original assignee: Предприятие П/Я А-1001
Priority date: 1979-10-25
Filing date: 1979-10-25
Publication date: 1981-10-15

Description

Изобретение относится к приборостроению и может быть использовайо в запоминающих устройствах цифровых вычислительных комплексов.The invention relates to instrumentation and can be used in the storage devices of digital computing systems.

Известно многоканальное устройство воспроизведения информации с магнитного носителя,(Содержащее блок магнитных головок, выходы которого через формирователи подключены к регистру, а выход регистра, подключен к блоку элементов й£1] . · ·A multi-channel device for reproducing information from a magnetic medium is known (containing a block of magnetic heads, the outputs of which are connected via a shaper to the register, and the output of the register is connected to the block of elements £ £ 1]. · ·

Недостатком такого устройства является снижение достоверности воспроизведения информации при отклонении от допустимого смещения головок в блоке и перекосе блока относительно магнитной ленты.The disadvantage of this device is the decrease in the reliability of reproduction of information when deviating from the allowable displacement of the heads in the block and the skew of the block relative to the magnetic tape.

Известно также устройство, в котором для исключения влияния относительного смещения головок в блоке , используют метод электронного выравнивания. Устройство содержит блок головок , синхронизирующие выходы которых подключены к счетчикам, а инфор2 мационные выходы через блоки элементов И подключены к входам регистров, счетчик разгрузки, выходы которого . через дешифратор подключены к другим входам регистров, выходы счетчиков ⁵ через соответствующие дешифраторы подключены к управляющим входам блог ков элементов ИС2].A device is also known in which to eliminate the influence of the relative displacement of the heads in the block, the electronic alignment method is used. The device contains a block of heads, the synchronizing outputs of which are connected to the counters, and information outputs through the blocks of AND elements are connected to the inputs of the registers, the discharge counter, the outputs of which. through a decoder they are connected to other inputs of the registers, the outputs of counters ⁵ through the corresponding decoders are connected to the control inputs of the blogs of elements IS2].

Недостатком этого устройства явялется его сложность и низкая информационная способность, что вызвано необходимостью для каждой инфорт мационной дорожки иметь дополнительную синхронизирующую дорожку.The disadvantage of this device is its complexity and low information ability, which is caused by the need for each information track to have an additional synchronization track.

Наиболее близким техническим ре^,s шением к предлагаемому изобретению является устройство для воспроизведения цифровой информации с многодорожечного магнитного носителя, содержащее блок магнитных головок воспро²⁰ изведения информационных сигналов, выход которого через блок формиро- . вателей информационных сигналов подключен к единичным входам' тригге- , ров первого регистра, одну магнитную головку воспроизведения синхроимпульсов, выход которой через последовательно соединенные формирователь синхроимпульсов и элемент задержки подключен к нулевым входам одной труппы триггеров первого регистра, блок элементов совпадения, число элементов которого равно числу информационных дорожек С31 Недостатком известного устройства является потеря достоверности . воспроизводимой информации при фазовых искажениях в каналах воспроизведения.The closest technical ^{D, s} k the present invention is an apparatus for reproducing digital information from a multitrack magnetic medium comprising a magnetic head unit ²⁰ repro product of information signals, the output of which through the formation unit. of information signal generators is connected to the single inputs of the triggers of the first register, one magnetic clock reproduction head, the output of which is connected through a serially connected clock generator and a delay element, is connected to the zero inputs of one trigger register troupe of the first register, the block of matching elements, the number of elements of which is equal to the number information tracks C31 A disadvantage of the known device is the loss of reliability. reproducible information with phase distortion in the playback channels.

Цель изобретения - повышение достоверности воспроизведения информации .The purpose of the invention is to increase the reliability of the reproduction of information.

Поставленная цель достигается тем, что в устройство для воспроизведения информации с многодорожечного магнитного носителя, содержащее блок воспроизведения информационных сигналов, выход которого через блок формирователей информационных сигналов подключен к единичным входам триггеров первого регистра, одну магнитную головку воспроизведения синхроимпульсов, выход которой через последовательно соединенные первый формирователь синхроимпульсов и первый элемент задержки подключен к нулевым входам одной группы триггеров первого регистра, блок элементов совпадения, число элементов которого равно числу информационных дорожек, введены второй регистр, выход которого связан с входом блока элементов совпадения, а единичный вход - с выходом первого регистра, последовательно соединенные элемент совпадения и второй элемент задержки, два триггера, нулевые входы которых подключены к выходу второго элемента задержки и нулевым входом триггеров второго регистра, а выходы триггеров подключены к входам элемента совпадения, соединенного выходом с управляющим входом блока элементов совпадения, а также последовательно соединенные другая магнитная головка воспроизведения синхроимпульсов, второй формирователь синхроимпульсов и третий элемент задержки, выход которого подключен к нулевым входам второй группы триггеров первого регистра, при этом выходы первого и третьего элементов задержки подключены к единичным входам триггеров.This goal is achieved by the fact that in the device for reproducing information from a multi-track magnetic medium containing an information signal reproducing unit, the output of which through the information signal former is connected to the single inputs of the first register triggers, one magnetic clock reproduction head, the output of which is through the first former in series clock pulses and the first delay element is connected to the zero inputs of one trigger group of the first reg tra, block of coincidence elements, the number of elements of which is equal to the number of information tracks, a second register is introduced, the output of which is connected to the input of the block of coincidence elements, and a single input is connected to the output of the first register, the coincidence element and the second delay element are connected in series, two triggers, zero inputs which are connected to the output of the second delay element and the zero input of the triggers of the second register, and the outputs of the triggers are connected to the inputs of the match element connected by the output to the control input of the element block in coincidence, and another series-connected magnetic head reproducing clock, a second clock generator and the third delay element, the output of which is connected to the zero input of the first register of the second group of flip-flops, the outputs of the first and third delay elements are connected to individual inputs of flip-flops.

На чертеже представлена структурная схема устройства.The drawing shows a structural diagram of a device.

Устройство содержит блок 1 магнитных головок воспроизведения информационных сигналов, выход которого через блок 2 формирователей подключен к единичным входам триггеров регистра 3, последовательно соединенные магнитную головку 4 воспроизведения синхроимпульсов, формирователь 5 и элемент 6 задержки, выход которого подключен к нулевым входам одной группы триггеров регистра 3 и к единичному входу триггера 7, магнитную головку 8,воспроизведения синхроимпульсов, выход которой через последовательно соединенные формирователь 9 и элемент 10 задержки подключен.к нулевым входам другой группы триггеров регистра 3 и к единичному входу триггера 11, выходы триггеров 7 и 11 подключены к элементу совпадения 12, выход которого подключен к управляющему входу блока 13 элементов совпадения и через элемент 14 задержки - к нулевым входам триггеров регистра 15 и к нулевым входам триггеров 7 и 11. Единичные входы триггеров регистра 15 подключены к выходу регистра 3, а выход регистра 15 подключен к входу блока 13 элементов совпадения. В состав регистров 3 и 15 входят триггеры 16, а в состав формирователей 5, 9 и блока 2 формирователей входят усилители сигналов головок 4,8,1 и формирователи импульсов стандартной форг мы.The device comprises a block 1 of magnetic heads for reproducing information signals, the output of which through the block 2 of the formers is connected to the unit inputs of the triggers of the register 3, the magnetic head 4 of the reproduction of clock pulses is connected in series, the former 5 and the delay element 6, the output of which is connected to the zero inputs of one group of triggers of the register 3 and to the single input of the trigger 7, the magnetic head 8, the reproduction of clock pulses, the output of which through series-connected shaper 9 and the element 10 rear LCD is connected. To the zero inputs of another group of triggers of register 3 and to the single input of trigger 11, the outputs of triggers 7 and 11 are connected to coincidence element 12, the output of which is connected to the control input of block 13 of coincidence elements and through element 14 of the delay to zero inputs of register triggers 15 and to the zero inputs of triggers 7 and 11. The single inputs of the triggers of register 15 are connected to the output of register 3, and the output of register 15 is connected to the input of block 13 of matching elements. The registers 3 and 15 include triggers 16, and the shapers 5, 9 and block 2 of the shapers include signal amplifiers for the heads 4,8,1 and pulse shapers of the standard form.

Устройство работает следующим образом.The device operates as follows.

Запись информации производится паг раллельным кодом на несколько информационных дорожек. Одновременно с информацией на две дорожки носителя записываются синхроимпульсы. В процессе воспроизведения на блок 2 поступают импульсы с информационных дорожек, а на формирователи 5 и/9синхроимпульсы. Выходные импульсы блока 2 формирователей устанавливают соответствующие триггеры регистра 3 в состояние ”1. ОДЦа группа триггеров регистра 3 устанавливает' ся в ”0 синхроимпульсами головки 4, сформированными формирователем 5 и задержанными элементом .6, а другая группа триггеров регистра 3 устанавливается в ”0” синхроимпульсами головки 8, сформированными формирователем 9Information is recorded using a parallel code on several information tracks. Simultaneously with the information, clock pulses are recorded on two tracks of the medium. In the process of reproduction, pulses from information tracks come to block 2, and sync pulses to 5 and / 9 sync pulses. The output pulses of the block 2 shapers set the corresponding triggers of register 3 in the state ”1. The OTC group of triggers of register 3 is set to “0” by the clock pulses of head 4, formed by driver 5 and delayed by element .6, and the other group of triggers of register 3 is set to “0” by the clock pulses of head 8, formed by driver 9

873274 6 и задержанными элементом 10. По зад* * ним фронтам выходных сигналов регистр ра 3 соответствующие триггеры регистра J5 устанавливаются в 1”. Выходные сигналы элементов би ·10 поступают на входы 1 триггеров 7 и II. При установке этих триггеров в ”1” выходной сигнал элемента 12 совпадения поступает на вход блока 13, опрашивая состояние регистра 15, и формирует выходной код. Задержанный элементом 14 выходной сигнал элемента 12 совпадения устанавливает в О регистр 15 и триггеры 7 и 11. Длительность выходных импульсных сигналов блока 13 равна времени задержки элемента 14. Допустимая временная нестабильность входной информации групп .триггеров регистра 3, подключенных к выходу элемента 6 (или элемейта873274 6 and delayed element 10. On the rear * * front edges of the output signals of register 3, the corresponding triggers of register J5 are set to 1 ”. The output signals of the elements of bi · 10 are fed to the inputs of 1 triggers 7 and II. When these triggers are set to “1”, the output signal of the match element 12 is input to the block 13, interrogating the state of register 15, and generates an output code. Delayed by element 14, the output signal of element 12 matches sets O register 15 and triggers 7 and 11. The duration of the output pulse signals of block 13 is equal to the delay time of element 14. Permissible temporary instability of the input information of the groups of triggers of register 3 connected to the output of element 6 (or element

10), равна длительности периода синхроимпульсов с выхода элемента 6 (или элемента 10 У. А временная нестабильность входной информации всех триггеров регистра 3 равна длительности двух периодов синхроимпульсов .10) is equal to the duration of the period of clock pulses from the output of element 6 (or element 10 U. And the temporary instability of the input information of all triggers of register 3 is equal to the duration of two periods of clock pulses.

Таким образом, применение двух последоватёльностей синхроимпульсов позволяет увеличить достоверность воспроизведения информации или при той же достоверности вдвое расширить допуски на фазовую нестабильность блока головок, формирователей импульсов и снизить требования к лентопротяжному механизму.Thus, the use of two sequences of clock pulses can increase the accuracy of information reproduction or, with the same reliability, double the tolerances for phase instability of the head block, pulse shapers and reduce the requirements for the tape drive mechanism.

Наиболее целесообразно использование изобретения в лентопротяжных кас*< сетных накопителях, в которых информа* ция с о^ной кассеты воспроизводится различными накопителями.It is most expedient to use the invention in tape drives * <network drives, in which the information * from one tape is reproduced by various drives.

Claims

The invention relates to instrumentation and can be used in the storage devices of digital computing systems. A multichannel device for reproducing information from a magnetic carrier is known (containing a block of magnetic heads whose outputs are connected to the register through shapers, and the register output is connected to a block of ICP elements. A disadvantage of such a device is a decrease in the reliability of reproduction of information when the head is off block and skew of the block relative to the magnetic tape. A device is also known in which, to exclude, the relative displacement of the heads in the block, use electronic alignment method.The device contains a block of synchronization outputs of which are connected to the counters, and information outputs through the blocks of the AND elements are connected to the inputs of the registers, an unloading counter, the outputs of which through the decoder are connected to other inputs of the registers, the outputs of the counters through the corresponding decoder connected to the control input of the blog of the elements of IS2. The disadvantage of this device in years is its complexity and low information capacity, which is a necessity for each information system. hydrochloric additional synchronization tracks have track. The closest technical solution to the inventive invention is a device for reproducing digital information from a multi-range magnetic carrier, comprising a block of information playback magnetic heads, the output of which through a block is formed. Information signal sources are connected to single trigger inputs, 3 channels of the first register, one magnetic playback head of sync pulses, the output of which is through a series of connected clock generator and a delay element connected to the zero inputs of one group of triggers of the first register, a block of coincidence elements, the number of elements of which equal to the number of information tracks G31 A disadvantage of the known device is the loss of reliability. reproducible information with phase distortions in the playback channels. . The purpose of the invention is to increase the reliability of reproduction of information. The goal is achieved by the fact that a device for reproducing information from a multi-track magnetic medium containing a reproducing unit of informational signals, the output of which is connected to unit inputs of triggers of the first register through a unit of information formers of the first register, a single magnetic head for reproducing sync pulses, which output sequentially the first clock generator and the first delay element are connected to the zero inputs of one group of first-stage triggers a gistra, a block of match elements, the number of elements of which is equal to the number of information tracks, a second register is entered, the output of which is connected to the input of a block of matching elements, and a single input - with the output of the first register successively connected match element and a second delay element, two triggers, zero inputs 1x connected to the output of the second delay element and the zero input of flip-flops in the third register, and the outputs of the flip-flops connected to the inputs of the coincidence element connected to the output from the control input of the electrical unit the matching and serially connected magnetic head of the sync pulses, the second clock generator and the third delay element, whose output is connected to the zero inputs of the second group of triggers of the first register, while the outputs of the first and third delay elements are connected to the unit trigger inputs. 4 The drawing shows a block diagram of the device. The device contains a block of 1 magnetic heads for reproducing information signals, the output of which through the block 2 drivers is connected to the single inputs of the trigger 3 of the register 3, serially connected magnetic head 4 of the playback of the clock pulses, the driver 5 and the delay element 6 whose output is connected to the zero inputs of one group of trigger 3 of the trigger 3 and to the single input of the trigger 7, the magnetic head 8, reproducing the clock pulses, the output of which through the serially connected driver 9 and element 1 0 delay connected to the zero inputs of another group of trigger registers 3 and to the single input trigger 11, the outputs of the trigger 7 and 11 are connected to the matching element 12, the output of which is connected to the control input of the block 13 matching elements and through the delay element 14 to zero the inputs of the trigger 15 register and to the zero inputs of the trigger 7 and 11. The unit inputs of the trigger register 15 are connected to the output of the register 3, and the output of the register 15 is connected to the input of the block 13 matching elements. The registers 3 and 15 include the triggers 16, and the formers 5, 9 and the block 2 of the formers include the signal amplifiers of the heads 4,8,1 and the pulse formers of the standard form. The device works as follows. Information is recorded by a parallel code on several information tracks. At the same time, sync pulses are recorded on the two tracks of the carrier. During playback, block 2 receives pulses from the information tracks, and synchro-pulses are sent to drivers 5 and 9. The output pulses of the block 2 of the formers set the corresponding triggers of the register 3 to the state 1. The BDCA group of the trigger of the register 3 is set to O by the clock 4 of the head formed by the shaper 5 and the delayed element 6, and the other group of the trigger of the register 3 is set to O by the clock of the 8 formed by the shaper 9 and the delayed elements 10. On the back of the fronts of the output signals of the register 3, the corresponding triggers of the register .15 are set to 1. The output sieve of elements 6 and 10 of the post go to the inputs of the I triggers 7 and II. When these triggers are set to 1, the output signal of the coincidence element 12 is fed to the input of block 13, testing the state of register 15, and generates an output code. The output signal of the coincidence element set by element 14 sets in O register 15 and triggers 7 and II. The duration of the output pulsed signals of block 13 is equal to the delay time of element 14. The time instability of the input information of groups of triggers of register 3 connected to the output of element 6 is acceptable (or element 10), is equal to the duration of the period of sync pulses from the output of element 6 (or element ICf J. And the time instability of the input information of all triggers of register 3 is equal to the duration of two periods of sync pulses. Thus In this case, the use of two sequences of sync pulses allows to increase the reliability of information reproduction or, with the same reliability, double the tolerances on the phase instability of the head unit, pulse shapers, and reduce the requirements for a tape drive mechanism. which information from one cassette is reproduced by various accumulators. The invention of the device for playback. digital information from a micro-track magnetic carrier containing a block of magnetic heads for reproducing information signals, the output of which through the block of information signal drivers is connected to the single inputs of the first register flip-flops, one magnetic head for reproducing clock pulses, the output of which is connected through the series-connected first driver of synchronous pulses and the first delay element is connected to zero inputs of one group of triggers of the first register, block of elements of coincidence, number of elements Which is equal to the number of information tracks, characterized in that, in order to increase the reliability of reproduction of information, a second register is entered into it, the output of which is related to the input of a block of matching elements, and a single input with an output of the first register, the serially connected matching element and the second a delay element, two triggers, the zero inputs of which are connected to the output of the second delay element and the zero input of the second register triggers, and the outputs of the triggers are connected to the inputs of the coincidence element, The control output of the block of matching elements, as well as sequentially connected friend's magnetic playback head, the second clock generator and the third delay element, the output of which is connected to zero, inputs of another group of triggers of the first register, while the outputs of the first and third the delay elements are connected to the single inputs of the triggers. Sources of information taken into account in the examination I. USSR Copyright Certificate №545005, cl. G 1 B 27/14, 03.11.73.

2. Kagan, BM and others. Mass storage devices. M., Energie, 1968, p. 296-299, fig. 8.11.

3.Shigin A. G. Digital computer machines. M., Energie, 1975, p. 387, fig. 12.50 (prototype j.