SU1206835A1 - Method of magnetic recording of digital information signals - Google Patents

Description

1206835

sequences of sync signal of the fourth type n p and when storing signals of the corresponding types.

one

The invention relates to instrumentation, in particular to digital magnetic recording, to moving magnetic media, such as magnetic tapes, disks, drums in high-performance multi-channel processing systems (registration) of large amounts of information, i.e. in systems where there is a need for simultaneous processing of information from several independent sources with recording or playing it on independent media or parts of the carrier (for each information source there is at least its own magnetic recording-playback channel) and is intended for savnicH binary electrical signals.

The aim of the invention is to determine the likelihood of recording by simplifying the logical processing of digital signals. .

FIG. 1 shows the time range

Agram to explain the proposed

recording method (where Ct is the recording resolution signal, & recording data, 6, t and Q are synchronization signals, e, -G. and d are status signals, c and c are control signals, L is the result of signal selection 1 and); on league. 2 - timing diagrams explaining the principle of unloading the information bus, which increases the system performance (where a is the recording resolution signal, b is an in () law bus, data is recorded, 6.2 and 1 are synchronization signals, е, 7t and 5 - state signals, U and K - control signals); Fig. 3 is a block diagram of the recording method; Fig. 4 is a device variant implementing the proposed method; Fig. 5 is a state graph of the circuit shown in Fig. 3 FIG. 6 - the correspondence between the input and transformed information (where l is the input information, S is the conversion Anne information, 6 - write current.

fourth quarter

Sixth types.

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The table shows the contents of the memory element shown in FIG. 4 (one of many that satisfies the graph shown in Fig. 5).

The input information 5 (Fig. 1 and 2) is synchronized to the clock sync series 6 and in block 1 (Fig. 3) one bit (Fig. 1) or two bits (Fig. 2) of the information is stored. The recording resolution signal in block 2 generates signals of state e, zHiZ and control signals and and K, which select one of the sync series g and j in block 3 or prohibit both sync series. The state signals are taken as input and fed to block I. The output signal A of block 3 is taken as a signal under signal and recorded through trigger 4 on the device 5 of the magnetic recording device.

The method (Fig. 4) is implemented as follows.

Input information S (Fig, 1) is stored in the zero discharge de register 1 (Fig. 4). In this case, the previously located bit is shifted to the first register bit 1, realizing the diagram of FIG. 2 (in the implementation of the diagram of Fig. 1, the register I has one bit less and, at the same time, the zero input of the La register is connected to the first input of the memory element 2 to the O input — directly the information line i5, Fig. 4). Prior to the start of recording (in the absence of the recording strobe c) of the status signals, the code 111 corresponds to the state of the state graph C (Fig. 5) compiled for the device of FIG. 3. As a result, code 111 is stored in the bits of register 1, beginning with the second multiple at each clock pulse.

When a recording strobe memory element 2 arrives at the control input (recording resolution) produced by the controller or communication unit with the central system (not shown),

1206835

the zero and single outputs of element 2 form control signals and, and K (Fig. 2) corresponding to the stored input information bits and the state code taken from the outputs, starting with the second memory element (signal. e, and 5), One of the variants of the contents of the memory element implementing the state graph — FIG. 5 is shown in the table.

1 i o o 1

11001

11010

11010

11110

11110

11,100

11011

01001

01001

10110

10110

10101

10101

11,100

11110

01110

01110

01101

about 1 about 1

Table continuation

ten

(FIG. 5) in the dependence on whether O or 1 is fed to the input of the first bit of the address (in the diagrams of figs, I and 2 the transition to state A is shown) .- Then the recording procedure is repeated. The removal of the recording strobe L (FIGS. 1 and 2) automatically switches the device to state C in the nearest clock cycle,

It should be noted that when two bits of information are memorized, a signal recording (as in FIG. 3) must be sent to a clock later than when recording with memorizing one bit of information. Signal Recording Recording in real i time can be performed as a controller whose performance is sufficient for correct performance hall-vrzhk. and hardware in the form of

delay elements of 1-1.5 / 2-2.5 cycles from the moment the information flow is started to be recorded, which in turn is determined by the computer command, external signal, etc,

Pulses removed from the output of the I-SHSh 3 element are converted using a counting trigger 4 into a signal recorded by block 5 on a magnetic carrier. No return to zero.

(FIG. 6), In the Record signal, the minimum duration between adjacent zero-intersections is set to 1.5T, and the maximum - 4T,

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Claims (1)

METHOD FOR MAGNETIC RECORDING OF DIGITAL INFORMATION SIGNALS by synchronizing the input information signals, their logical conversion, the subsequent formation of the recording signal and magnetization reversal of the magnetic medium at two levels with minimum and maximum durations between the differences equal to I, 5T and 4T, respectively, where T is the period of the sequence of bit signals input information, characterized in that, in order to increase the probability of recording by simplifying the logical processing of digital signals, in the process of logical transformation I store signals from one to two bits of input information, form seven state types of signals and control signals from them, the received state signals are stored and used as input information signals, and control signals allow recording by magnetization reversal of a magnetic medium using signals from one of two sequences of clock signals, in this case, state signals of the first type are formed prior to recording, state signals of the second and third types are recorded at the time of recording, if the recorded signal is sets the bullet bit and unit ”, respectively, when storing state signals of the second type, they generate state signals of the fourth and fifth types for the next bit signal, if it represents zero and one, respectively, when storing state signals of the third type they form state signals of the second type for the next bit signal, if it represents zero, of the sixth type, if it represents one, and the next bit is zero, and of the seventh type, if the unit following the next unit bit, when remembering every state signals of the fourth and fifth types generate state signals of the second and third types for the next bit signal, if it represents zero and one, respectively, when storing the state signals of the sixth type, the state signals of the fourth type are generated for the next bit, and when the state signals of the seventh type are stored, state signals are generated of the sixth and second types for the signal of the next unit bit, if the next bit represents zero and one, respectively, and magnetization reversal is carried For enable control signals for the signals of the first and second SU .. „1206835 according to the sequence of sync signals when storing signals of the fourth type and the fifth and sixth types, respectively.