SU1448358A2 - Apparatus for magnetic recording of digital information - Google Patents

Abstract

The invention relates to a device for recording digital information on moving magnetic media and allows for improving the accuracy of the recorded information on the pilot signal. The device contains a receiving register 1 connected in a definite way, a buffer memory block 2, a code converter -3, a control and recording circuit 4, a magnetic head block 5, a magnetic carrier movement unit 6 including a speed control circuit 7. The magnetic heads unit 5 contains N magnetic heads, N of which are connected to the inputs of the pilot amplifier driver 8, the output of which is through the additionally inputted analog adder 11, the low-pass filter 12 and the driver 13 are connected to the inputs of the buffer memory unit 2, circuits 7, speed control, code converter 3, buffer storage analysis circuit 9. The N-1 magnetic head is connected to the second input of the adder 11 through an additional amplifier-shaper 10. The N-1 magnetic head is used as an adder of electromagnetic interference from other magnetic heads operating in the recording mode, the phase of which is opposite to the phase of the output noise amplifier-driver 8 pilot signal. 1 il. I cl 4 00 00 ate as

Description

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The invention relates to instrumentation and, in particular, to a device for recording digital information on a magnetic carrier, and is an improvement of the known device for recording digital information on the author. St. No. 720493.

The aim of the invention is to improve the accuracy of the recorded information on the pilot signal.

The drawing shows a block diagram of a device for magnetic recording of digital information.

The device contains a receiving register 1, a buffer memory block 2, a code converter 3, a control and recording circuit 4, a magnetic head block 5 installed in a magnetic carrier transfer unit 6, including a speed control circuit 7, sequentially connected to the information channel. In this case, the N-magnetic head is connected to the inputs of the amplifier-fordator 8 pilot signal.

The device contains a buffer memory analysis circuit 9, an additional amplifier driver 10, the output of the amplifier driver 8 sub-keys to the corresponding inputs of the buffer memory block 2, the code converter 3, the buffer memory full analysis circuit 9 and to the first input of the control circuit 7 speed through serially connected analog adder 11, low-frequency filter 12 and shaper 13, while the additional amplifier-shaper 10 is switched on by means of (Y-1) -th magnetic head of the magnetic heads block, containing its N magnetic heads, and the second input of the analog adder 11, while the other inputs of the buffer storage analysis circuit 9 are connected to the signal outputs of the buffer memory block 2, with one of the outputs of the receiving register 1 connected to the second input of the circuit 7 speed control, the third input connected to the output of the circuit 9 analysis of the buffer memory.

Device for magnetic recording 1 DIFFERENT information works as follows.

The signals, the subject of the recording, are transmitted via the information channel to the receive register 1, which is transformed into a register-friendly form.

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radios in block 2 of the buffer memory, at the same time, in the receiving register 1, a frequency is proportional to the frequency of words arriving at block 2 of the buffer memory, which is fed as a reference to the speed control circuit 7 of the magnetic carrier, which This includes the motor moving the magnetic carrier for acceleration. With the beginning of the movement of the magnetic carrier, the last N magnetic head reproduces the pilot signal, which is amplified by the amplifier shaper 8 and fed to one of the inputs of the analog adder 11. To eliminate electromagnetic interference from the recording amplifiers occurring in the pilot magnetic reproduction head in recording mode ( N-1) —The magnetic head is used as an adder for electromagnetic interference from other magnetic heads operating in recording mode.

(L-1) —the magnetic head of the magnetic heads unit 5 is connected via the amplifier-shaper 10 to the second input of the analog adder 11, and the phase of the interference signal is opposite to the phase of the interference at the output of the pilot-forming amplifier 8, and its amplitude is adjusted during tuning adjusting the gain of the amplifier-amplifier 10. From the code of the analog adder 11, the pilot signal jammed with only high-frequency interference 1and determined by parasitic capacitive connections is fed to the low-pass filter 1-2. From the output of the filter 12, the pilot signal is fed through the driver 13 to the block 2 of the buffer memory for recording the signal on magnetic media and on the speed control circuit 7 for comparison with the reference frequency.

The speed control circuit 7 maintains the speed of movement of the magnetic carrier, ensuring that the average frequencies of the arrival of the words in the block 2 of the buffer memory and its polling are equal. Analysis buffer filling circuit 9, depending on the speed and filling level of the buffer memory block 2, absorbs signals that provide accelerated acceleration of the engine at a high filling rate and deceleration in case of fast or extreme freeing of the buffer memory.

Claims (1)

Invention Formula A device for magnetic recording of digital information on the author. St. 720493, characterized in that, in order to improve the recording accuracy of the pilot signal, an additional amplifier-shaper is inserted into it, the output of the amplifier-shaper -Y-magnetic head is connected 83584 to the corresponding inputs of the buffer memory block, the code converter, the buffer memory filling analysis circuit, and the first input of the speed control circuit through an input serially connected analog combiner, low pass filter and driver, while the additional amplifier is connected between (N -1) -th magnetic head of the block of magnetic heads from N-rollers and the second input of an analog summatr.