SU1631581A1 - Device for multichannel data recording on a magnetic medium - Google Patents

Abstract

The invention relates to instrumentation primarily to the recording of information in magnetographs. The invention allows to increase the volume of the recorded information without changing the number of tracks on the magnetic media. The goal is achieved by applying two carrier frequencies differing in magnitude, alternating along the carrier tracks with a sequence of alternating zeros and ones in the code of the value of the additional signal. The device contains generators 3, 4 of different carrier frequencies, connected through multiplexers 5 to analog-digital converter 6 and windings 2 biasing magnetic recording heads 1. 1 il.

Description

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The invention relates to instrumentation, primarily to recording information, for example, in magnetographs.

The purpose of the invention is to increase the amount of recorded information.

The drawing shows a block diagram of the proposed device.

The device contains magnetic recording heads 1 with windings 2 bias and information windings (not shown), 3 and 4 carrier generators and twice the carrier frequencies, respectively, multiplexers 5, analog-to-digital converter (ADC) 6, connected with an input to a source of additional information (not shown), and outputs through multiplexers 5 - with windings 2 and generators 3 and 4.

The device works as follows

From the output of the A / D converter 6, the digital code goes to the first inputs of multiplexers 5; in this case, with a digital signal corresponding to 1, a carrier 3 generator is connected to winding 2, and a double carrier frequency 4 is connected to O. At the same time, the main analog signals are fed to the information windings of the heads.

The recording of signals is carried out by the combined action of signals with frequencies of oscillators 3 and 4 and input analog signals.

During playback, a combination of carriers is identified as a combination of zeros and units of additional information.

Claims (1)

Invention Formula A device for multi-channel recording of information on magnetic media containing magnetic recording heads with information windings connected to a source of information and with bias windings and a carrier frequency generator, characterized in that, in order to increase the amount of recorded information, a source of additional information is entered into it, analog-to-digital converter with the number of outputs equal to the number of magnetic recording heads, multiplexers for the number of magnetic recording heads and a double carrier generator The inputs of the analog-digital converter are connected to a source of additional information, and the outputs are connected to the first inputs of multiplexers, the second inputs of which are connected to the output of the carrier frequency generator, the third inputs to the output of the double carrier frequency, and the outputs to the bias windings of the corresponding magnetic recording heads.