SU1458886A1 - Apparatus for two-channeld magnetic recording of digital information - Google Patents

Abstract

The invention relates to equipment, build-up, in particular, to devices for recording digital information signals on magnetic media and allows for increasing the linear density of information recording on magnetic media by registering three binary bits in two.

Description

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The invention relates to instrumentation, in particular, to a device for recording digital information signals on a magnetic carrier.

The purpose of the invention is to increase the linear density of information recording

The drawing shows a block diagram of the device ..

A device for two-channel magnetic recording of digital information contains a register 1 connected by inputs to information bus 2, the first output through serially connected first element AND 3, first element OR 4, first trigger 5 and first recording amplifier 6 to the first recording head 7 , the second output is to the first inputs of the second and third elements I 8 and 9, the second input of the last of which is connected to the output of the first element N Yu and the output through serially connected second element OR 11, second trigger 12 and second amplifier 13 zap isi - to the second recording head 14, the fourth - the sixth elements 15-17, in addition, serially connected bus 18 clock pulses, the third trigger 19, the first driver 20 pulses, the delay line 21 and the fourth trigger 22, the second input of which is connected to the output the first element OR 4, and the outputs, respectively, to the second input of the element AND 8 and to the third input of the element AND 9, the fourth input of which is connected to the output of the driver of 20 pulses, with

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the third input element And 8 directly and through the element And 15 - with the second inputs of the elements OR 4 and 11, the third inputs of which are connected to the output of the element And 16, the second driver 23 pulses, the input connected to the second output of the third trigger 19, -a output - with the control input of the register 1, with the second input of the element And 3, with the first inputs of the elements And 16, 17, the decoder 24, the inputs connected to the outputs of the register 1, the output to the second input of the element And 16 and through the element NOT 10 - with the fourth input of the element And 8, the output of which is connected to the fourth in one of the first element OR 4, the second element NOT 25, connected between the second input of the AND 15 element and the second output of the register 1, the third input of which is connected to the second input of the AND 17 element, the output connected to the fourth input of the OR 11 element.

A device for two-channel magnetic recording of digital information works in the following way.

The digital code in the form of three parallel binary bits lio bus 2 is fed to register 1, and the write clock clock on bus 18 to the counting input of trigger 19. Formers 23 and 20 pulses form two parallel pulse sequences in jumps of output voltages of trigger 19 The pulses of the generator 23 are controlled by the reception of the code in the register 1. The writing of the code group of three bits using the device 10

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Wa takes place within two clock pulses. The first two bits of the group are recorded in the first cycle by changing the magnetization on parallel tracks of the carrier in accordance with signals 1. The third bit of the group is recorded in the second cycle by parallel changing the magnetization in accordance with the signal O and changing on one of the tracks in accordance with signal 1 In addition, a code pattern of type 001 is determined, which is recorded by the presence of parallel changes in magnetization in the first recording cycle and the absence of changes and magnetism. ; STI - in the second measure. Therefore, in the presence of signals 1 in the first bits of the bits, the pulses of the first cycle of recording from the output of shaper 23 pass the elements AND 17, 3 and through the elements OR 11, 4 arrive at the counting inputs of the trigger 12 and 5. The output signals of the trigger 12 and 5 are amplified by amplifiers 13 and 6 and using magnetic heads 14 and 7 are recorded on a magnetic carrier (not shown in the drawing). At the same time, the presence of a change in the state of trigger 5 is remembered before the second recording cycle by trigger 22. If the third bit is the signal O, the pulse of the driver 20 passes through the AND 15 element opened by the signal of the HE 25 and the OR 11 and 4 elements arrive triggers 12 and 5, causing a change in the direction of magnetization of the carrier in the second clock period of the recording. If in the second cycle 1 is recorded, then the signal from the output of register 1 goes to elements AND 9 and 8, one of the inputs of which is connected to trigger 22. Therefore, the pulse from the output formed 20 passes through that element AND 8, OR 11 and 4 to trigger 12 "5, which did not change state in the pen clock period. If there is one group of the species; 001, the decoder 24 is triggered, which opens the element I 16. The impulse of the former 23 drives an element AND 16 and through the elements OR 11 and 4 triggers triggers 12 and 5. This is a code entry. group 001 ends as l of the given code combination changes the carrier magnetization in

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the second clock period is not produced. Thus, the device provides recording of a code group of, three bits in two clock intervals,. Rhoda.

Claims (1)

Invention Formula A device for two-channel magnetic recording of digital information, containing a register, connected to the information bus by inputs, the first output through serially connected first element AND, the first element OR, the first trigger and the first recording amplifier to the first recording head, the second output to the first inputs of the second and The third element And, the second input of the last of which is connected to the output of the first element is NOT, and the output is connected via the second element OR connected in series, the second trigger and the second recording amplifier to the second catching record, the fourth, fifth and sixth elements AND, characterized in that, in order to increase the linear density of the recording information; S entered afterwards 30 40 clock connected pulse bus, third trigger, first pulse driver, delay line and fourth trigger, the second input of which is connected to the output 25 of the second element OR, and the outputs, respectively, to the second input of the second element, AND, and to the third input of the third element, AND, the fourth input of which is connected to the output of the first pulse generator, to the third input element, AND directly and through the fourth element, AND to the second the inputs of the first and second elements OR, the third inputs of which are connected to the output of the fifth element AND, the second pulse shaper, the input connected to the second output of the third trigger, and the output to the control input of the register, with the second input first And, with the first inputs of the fifth and sixth elements And, the decoder, the inputs connected to the outputs of the register, the output to the second input of the fifth element And through gg the first element is NOT connected to the fourth input of the second element AND, the output of which is connected to the fourth input of the first element OR, the second element is NOT included between the second 45 50 514588866 the input of the fourth element AND and the input element AND, the output of the connected register output, the third input of which to the fourth input of the second element is connected to the second input of the neck OR.