SU957260A2

SU957260A2 - Device for digital magnetic recording

Info

Publication number: SU957260A2
Application number: SU772527013A
Authority: SU
Inventors: Альгимантас-Бернардас Антанович Килна; Линас Ионо Закарявичюс
Original assignee: Институт Математики И Кибернетики Ан Литсср; Каунасский Медицинский Институт
Priority date: 1977-09-27
Filing date: 1977-09-27
Publication date: 1982-09-07

Description

1 one

Изобретение относитс к приборостроению , а частности, к устройствам записи цифровых кодов ритмических процессов на магнитный носитель.The invention relates to instrumentation, and in particular, to devices for recording digital codes of rhythmic processes on magnetic media.

По основному авт.св. № известно устройство дл записи цифровых кодов периода входного сигнала на магнитный носитель, которое содер житпоследовательно соединённые формирователь импульсов, блок управлени to первую схему И, подключенную к первому генератору импульсов, счетчик импульсов , регистр и блок записи, второй генератор эталонных импульсов, подключенный через вторую схему И, js соединенную с соответствующим выходом -блока управлени ,к регистру и через второй счетчик импульсов - к блоку уп равлени ,причем выход блока управлени соединен с входом приема кода регист- М ра, выход которого подключен к его младшему разр ду l ,According to the main auth. No. a device for recording digital codes of the period of the input signal on a magnetic carrier, which contains successively connected pulse generator, control unit to the first AND circuit connected to the first pulse generator, pulse counter, register and recording unit, second reference pulse generator connected via the second And, js connected to the corresponding output of the control unit, to the register and through the second pulse counter to the control unit, the output of the control unit connected to the input receiving code regist- M pa, whose output is connected to its least significant bit do l,

Однако в известном устройстве недостаточна помехоустойчивости запоминаемых данных при записи кодовых групп с паузами при использовании способов записи с самосинхронизацией , например, методами частотной или фазовой записи.However, in the known device, the noise immunity of the stored data is insufficient when recording code groups with pauses when using recording methods with self-synchronization, for example, using frequency or phase recording methods.

Цель изобретени - повышение помехоустойчивости записываемой информации .The purpose of the invention is to improve the noise immunity of the recorded information.

Цель достигаетс тем, что устройство снабжено схемой ИЛИ, включенной между выходом pervicTpa и блоком записи, пересчетной схемой, входом подключенной к второму генератору эталонных импульсов, а выходом через дополнительную .схему И, соединенную через инвертор с соответствующим выходом блока управлени , к второму входу схемы ИЛИ.The goal is achieved in that the device is equipped with an OR circuit connected between the pervicTpa output and a recording unit, a scaling circuit, an input connected to the second reference pulse generator, and an output through an additional AND circuit connected through an inverter to the corresponding output of the control unit to the second input of the circuit OR.

На чертеже приведена блок-схема устройства.The drawing shows a block diagram of the device.

Claims

The pulse shaper 1 is connected via control unit 2 to one of the inputs of the AND 3t circuit, the second input of which is connected to the first generator of 4 reference pulses, and the output of the counter is connected in series to the first counter of 5 pulses, the register 6 and the OR 7 circuit with the 8 recording block. The second generator of reference pulses is connected via the AND 10 circuit to an additional input of register 6 and, through the second counter, 11 pulses with the corresponding input of control unit 2. The output of the generator y is also through the Scaling circuit 12 and the circuit AND 13. Connected via an inverter 1 to the control unit 2, connected to the circuit OR 7. The device operates as follows. . The input periodic signal is. steps onto the shaper 1, the output pulses of which are fed to the control unit 2. At certain intervals, this block opens the AND 3 circuit, and the counter 5 receives impulses from the generator k. At the end of the interval between the pulses of the driver 1, the control unit 2 transmits the code of the counter 5 to the register 6, the counter returns to the initial state and the AND 10 circuit opens. Then the pulses of the generator 9 start to flow to the register 6 and the counter 11. The pulses from the output of the register arrive at its the first bit and through the scheme OR 7 to block 8 records. Therefore, counter code 5 is recorded on the media sequentially and repeatedly. Output im pulse counter. 1, the control unit enters, and the AND 10 circuit is closed, and the AND 13 circuit opens through the inverter I. Therefore, the generator 9 pulses through the counting circuit 12 is fed to the second input of the OR circuit 7. Thus, in the pauses between the code groups, oscillation with a frequency that is less than the clock frequency of recording information; the device can be used in the study of rhythmic processes and provides higher immunity of data, since it allows for the definition of the beginning and end of the code r during playback. groups carry on the frequency jumps of the playback signal. The invention The device. Digital magnetic recording auth.St. No, characterized in that, in order to improve the noise immunity of the recorded information, it is equipped with an OR circuit connected between the register output and a recording unit, a scaling circuit, an input connected to the second reference pulse generator, and an output through an additional I circuit connected via an inverter with the corresponding output of the control unit, to the second input of the OR circuit. Sources of information taken into account in the examination 1. USSR author's certificate N, cl. G 11 B 5/09, 1976 (prototype).