SU853654A1 - Device for magnetic recording and reproduction - Google Patents

Description

one

The invention relates to the field of magnetic recording, in particular to devices for magnetic recording and reproduction.

A device for magnetic recording and reproducing is known, which contains an information signal input bus connected via a recording amplifier to a recording head mounted with interface with a magnetic tape mounted to affect a reproduction head connected through an amplifier of reproduction with an output signal of information 1 .

The known device has a relatively simple design, but does not provide a sufficiently high accuracy of the playback result.

It is also known a device for magnetic recording and playback, containing input buses of information signals, connected to the first inputs of voltage adders, the outputs of which are connected via recording amplifiers to recording heads mounted with a possibility of interfacing with magnetic tape.

playback heads connected via playback amplifiers with the inputs of bandpass filters and with the inputs of low-pass filters whose outputs are connected to analog-code converters connected to the outputs of pulse shapers and to the output data-line voltage generator 2.

This device provides relatively high reproduction accuracy. The drawback of the device is that it does not allow for a high density of magnetic recording.

The purpose of the invention is to increase the magnetic recording density.

Claims (2)

This is achieved due to the fact that phase manipulators made with the input buses of the pulse signals and connected to the output of the periodic voltage generator, high-pass filters connected to the second inputs of the voltage adders, phase demodulators, are inserted into the device for magnetic recording and playback. made with the output buses of pulse signals and connected to the outputs of the bandpass filters, and full-wave rectifiers connected to the inputs of the pulse shapers. At the same time, the outputs of phase handles are connected to high-pass filters, and the outputs of bandpass filters are connected to full-wave rectifiers. The drawing shows one of the possible variants of the proposed device for magnetic recording and playback. The proposed device contains input buses 1 of information signals connected to the first inputs of the adders of the 2 voltages. The outputs of the adders 2 voltages are connected via amplifiers 3 recordings with recording heads 4 mounted to act on magnetic tape 5. Magnetic tape 5 is mounted to mate with reproducing magnetic heads 6 connected through playback amplifiers 7 to inputs of bandpass filters 8 and with 9 low-pass filter inputs. The outputs of the low-pass filters 9 are connected to converters 10 analog-code connected to the outputs of the formers of 11 pulses and to the output currents of 12 information pulses. The proposed device also contains phase manipulators 13, made with input buses 14 of pulse signals, and high-pass filters 15 connected to the second inputs of the adders 2 of the voltages. In this case, the high-pass filters 15 are connected to the outputs of phase handlers 13 connected to the output of the generator 16 of a periodic voltage. The device also contains phase demodulators 17, made with output fluxes 18 of impulse signals, and full-wave rectifiers 19, connected to the inputs of the formers 11 of pulses. The phase demodulators 17 are connected to the outputs of the bandpass filters 8 connected to the full-wave rectifiers 19. In the proposed device, during the magnetic recording process, the recording heads 3 receive information signals and the results of phase manipulation of the periodic voltage pulse signals. In the course of reproduction, information signals are extracted by filters 9 of the LOWER frequencies and are fed to converters 10 analog-code. In addition, in the process of reproducing, the results of phase manipulation of the periodic voltage by pulsed signals are separated by band-pass filters 8 and fed to phase demodulators 17. The use of the invention substantially increases the density of magnetic recording. Claims X (Magnetic recording and playback device containing information signal input buses connected to the first inputs of voltage adders, the outputs of which are connected through recording amplifiers to recording heads mounted with conjugation playback heads connected via playback amplifiers to the inputs of bandpass filters and to the inputs of low-pass filters whose outputs are connected to the converter Lm analogue code, connected to the outputs of the pulse formers and to the output signals of the information signals, and a periodic voltage generator, characterized in that, in order to increase the density of the magnetic recording, it is entered-phase manipulators made with input buses pulse signals and connected to the output of a periodic voltage generator, high-pass filters connected to the second inputs of the voltage adders, phase demodulators made with output buses of pulse signals and connected to outputs of bandpass filters, and full-wave rectifiers connected to the inputs of pulse shapers, with the outputs of phase manipulators connected to high-pass filters, and the outputs of band-pass filters with full-wave rectifiers. Sources of information taken into account in the examination 1. A. Efimov. Recording sound and images. M., “Svy, 1966, p. 26 2. USSR author's certificate number 323793, cl. G 11 B 5/00, 1970 (prototype).