SU447760A1 - Device for reproducing information - Google Patents

Description

one

The invention relates to computing technology and can be applied in magnetic drum and disk storage devices.

The device is intended for use in storage devices using two magnetic heads on one track. The recording information is received in a sequential form and converted into a parallel form, with, for example, the first four bits being recorded by the first head, and the next four bits by the second and t, e. Since the frequency of recording information by each head is twice as low as the frequency of input information, there are no gaps in the recording signals of each arm corresponding to the missing fours. Since the two magnetic heads are located diametrically opposite on the same track and the signals of the data array are reproduced regardless of which of the two heads were recorded.

(signals, a reduction in the average circulation time is achieved.

Devices for reproducing information are known that contain reproduction amplifiers connected to a driver and shift registers.

. The described device is characterized in that it contains circuits.

0 matches, build scheme registers

and a tracer recognition unit, the output of the first pulse generator connected to the input of the tracer recognition unit and with the first

5 inputs of the first and second coincidence circuits, the output of the second pulse generator is connected to the first inputs of the third and fourth coincidence circuits, the output of the sign recognizer is connected to the register input, the first output of the register is connected to the second input of the first coincidence circuit and the second input of the fourth coincidence circuit. The second output of the register is subaligned to (the second input of the third coincidence circuit and the second input of the second coincidence circuit, the outputs of the first and third coincidence circuits are connected via the first assembly circuit to the input of the first shift register, and the outputs of the second and fourth coincidence circuits are connected via the second assembly circuit to the input second shift register.

This improves device performance.

The output of the second prepoferator of pulses is connected to the second input of the recognition unit.

In figl, where the described device is depicted, the following notation is accepted: 1 and 2 are playback amplifiers, 3 and 4 are pulse formers, 5 is a sign recognition unit, b is a register, 8.9 and 10 are coincidence circuits, ll and 12 are assembly circuits, 13, shift registers.

Fig. 2 shows one of the variants of the pattern of recognition of the feature of information, where 16 is a matching circuit, 17 is a multi-digit counter shifting register 18; 19 is a matching scheme.

The signals from the output of amplifiers 1 and 2 of the playback are fed to the inputs of the formers 3 and 4 pulses, which extract information from the output signals of the playback services. The high signals of the imaging unit 3 are fed to the input of the recognition unit 5 and to the first inputs of the circuits and 8 matches. The outputs of the imaging unit 4 are fed to the input of the recognition unit of the feature and to the first inputs of circuits 9 and 10,

From the output of the imaging unit 3, the first input of the coincidence circuit 16 receives a continuous sequence of units, indicating that when converting information from a parallel form to a serial one, the first four bits of information coming from the output of the imaging unit 3 must go. from the shaper output -is second four from the shaper 3 output before the second four from the Ford output: Irovatel 4 and so on. With the pressure; a continuous sequence of units from the output of the imaging unit 3 at the output of the imaging generator k, a continuous sequence of zeros is observed, and at the second input of the coincidence circuit 16 is a level that cuts the input

Formations from the output of the coincidence circuit to the shift register 17. The pulses of the synchronization series, which carry out the information shift in the shift register, arrive at the counting input of the multi-digit counter 18. After every pulse at the input of the counter 18, a coincidence circuit 19 is received. his exit. To the inputs of the coincidence circuit 19, the outputs of the registering register 1 receive the enabling signals, if a continuous sequence of units is entered in register 1. The pulse of the output of the coincidence circuit 19 transfers the register 6, previously set by the reset pulse to the zero state, to the one state. If at the moment of availability of the resolution at the second input of the coincidence circuit 1, the first input of this coincidence circuit receives a continuous sequence of zeros, the coincidence check 19 does not generate a pulse, and the register 6 remains in the merged state. This corresponds to the fact that when converting information from a parallel form into a sequential first four, the information bits from the output of shaper 4 must go before the first four, the information bits from the output of form-3, and so on.

rj In the event that the fours of the information bits from the output of the furiate 3 must go before, the fours from the output of the driver 4, at the second inputs of the Sov. 7 and 10

0 sets the resolving level, and at the second inputs, with hem, coincidence 8 and 9 - prohibiting -.

The pulses from the output of the coincidence circuit 7 and 10 are received through the schema) we build 11 and 12 corresponding to the shift registers 13 and 14. The infermation from the shift register 13 is rewritten to the higher bits of the shift register 15,

and from the shift register H to the lower bits of the shift register 15.

with significant phase shifts of information pulses at the output of pulse shapers 3 and 4, it may be necessary to use two sets of sync pulses from each other, one of which serves to extract information pulses in the pulse shaper 3, and the other to extract information pulses in the shaper 4. SUBSTANCE ISSETTING 1. A device for reproducing information comprising reproduction amplifiers connected to shapers and shifting registers, characterized in that, in order to increase It contains coincidence circuits, registers of the assembly circuit and a sign recognition unit, the output of the first pulse generator connected to the input of the recognition unit and with the first inputs of the first and second matching circuits, the output of the second pulse generator connected to the first inputs of the third and fourth circuits match, the output of the recognition unit is connected to the input of the register, the first 606 OUTPUT of the register is connected to the second input of the first matching circuit and the second input of the fourth matching circuit, the second the register output is connected to the second input of the third coincidence circuit and to the second input of the second coincidence circuit, the outputs of the first and third coincidence circuits are connected through the first assembly circuit to the input of the first shift register, and the outputs of the second and fourth coincidence circuits are connected via the second assembly circuit to the second shift input register. 2, The device according to claim 1 | characterized in that the output of the second pulse generator is connected to the second input of the recognition unit.

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6

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1 11

2

12

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5678 75

1 25

FIG. one

FIG. 2