SU834745A1

SU834745A1 - Device for reproducing pulse information from magnetic record carrier

Info

Publication number: SU834745A1
Application number: SU792835463A
Authority: SU
Inventors: Альгимантас-Бернардас Антанович Килна; Владимир Константинович Прусаков; Владимир Михайлович Ерастов
Original assignee: Институт Математики И Кибернетикиан Литовской Ccp; Предприятие П/Я A-3593
Priority date: 1979-10-30
Filing date: 1979-10-30
Publication date: 1981-05-30

Description

1one

Изобретение относитс к приборостроению и может быть использовано в технике магнитной записи при воспроизведении дискретных сигналов.The invention relates to instrumentation and can be used in the technique of magnetic recording when playing discrete signals.

Известно устройство, реализующее способ воспроизведени , в котором задержанный воспроизведенный сигнал сравнивают с сигналом, воспроизведенным ранее, после чего вырабатываетс импульс в моменты совпадени упом нутых сигналов р-JНедостатком известного устройства вл етс низка стабильность импульсов из-за того, что импульсы формируютс при нулевом значении производной сигнала, т.е. в тех местах, где вли ние аддитивных шумов тракта записи-воспроизведени вл етс максимальным .A device implementing a reproduction method in which a delayed reproduced signal is compared with a signal reproduced earlier is known, after which a pulse is generated at the instants of coincidence of said signals p-J The disadvantage of the known device is the low stability of pulses due to the fact that derived signal, i.e. in those places where the effect of the additive noise of the record-play path is maximum.

Наиболее близким к предлагаемому вл етс устройство дл воспроизведени импульсной информации с магнитного носител записи, содержащее магнитную головку воспроизведени , подключенную через усилитель к первому входу порогового элемента, а также выходную шину Г2 1Недостатком данного Устройства вл етс невысока достоверность воспроизведени .The closest to the present invention is a device for reproducing pulse information from a magnetic recording medium, containing a magnetic reproduction head connected through an amplifier to the first input of a threshold element, as well as an output bus G2 1 The disadvantage of this Device is the low fidelity of reproduction.

Цель изобретени - повышение достоверности воспроизведени .The purpose of the invention is to increase the reliability of reproduction.

Поставленна цель достигаетс за счет того, что устройство дл воспроизведени импульсной информации с магнитного носител записи, содержгицее магнитную головку воспроизведени , подключенную через усилитель к первому входу порогового элемента, а также This goal is achieved due to the fact that the device for reproducing pulse information from a magnetic recording medium, contains a magnetic reproduction head connected through an amplifier to the first input of the threshold element, as well as

0 выходную шину, снабжено подключенным к выходу порогового элемента формирователем пр моугольных сигналов, св занным одновременно с выходной шиной и, через соединенные последовательно0, the output bus is provided with a square wave driver connected to the output of the threshold element and connected simultaneously with the output bus and connected through in series

5 дополнительно введенные блок вьщелени посто нной составл ющей сигнала и блок управлени пороговым уровнем сигнала - с вторым входом порогового элемента.5 additionally inputted block of the constant component of the signal and block of control of the threshold level of the signal - with the second input of the threshold element.

0 На чертеже изображена структурна схема устройства.0 The drawing shows a block diagram of the device.

Устройство содержит магнитную головку 1 воспроизведени , воспроиэвод щую сигнал с магнитного носител 2The device contains a magnetic reproduction head 1, which reproduces the signal from the magnetic carrier 2.

Claims

5 recording connected via amplifier 3, threshold element 4 and square wave shaper 5 to output bus b, which is also connected via signal extractor 7 and signal threshold control unit 8 to the second input of threshold element. The device works by following the image of an Ohm. Reproduced by magnetic reproduction head 1 from magnetic recording medium 2, the signal is amplified by amplifier 3 and fed to threshold element 4, which produces pulses when the amplified signal reaches a predetermined threshold level. The pulses from the threshold element 4 are fed to the block 5 of the formation of rectangular signals, from the output of which the signal is fed to the output bus beat by the block 7 of the selection of the constant component of the signal from which the output voltage, which appears when the signal is reproduced or when unequal values of positive and negative threshold levels on the threshold element 4, enters block 8 of the control unit by a threshold signal level, which, depending on the magnitude and sign of the input voltage, changes the threshold level of pores pulling element 4 so as to exclude the constant component in the output device. The change in the threshold level depending on the magnitude of the constant. The component in the output square signal allows to increase the reliability of reproduction of information. An apparatus for reproducing pulse information from a magnetic recording medium, comprising a magnetic reproduction head connected through an amplifier to a first input of a threshold element, as well as an output bus, characterized in that, in order to increase the reliability of reproduction, it is provided with a shaper connected to the output of the threshold element rectangular signals connected simultaneously with the output bus and, through connected additionally connected consecutive allocation unit connected in series the signal component and the signal threshold level control unit are with the second input of the threshold element. Sources of information taken into account during the examination 1. USSR author's certificate No. 541192, cl. G 11 On 5/06, 1976.

2. USSR author's certificate number 647726, cl. G 11 B 5/06, - 1978 (prototype).

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