SU1674238A2 - Information recording device - Google Patents

Abstract

The invention relates to instrumentation, in particular, to devices for recording or recording information. To improve the recording accuracy and simplify the process of reproducing information in the device, the recorder 2 is calibrated against the reference voltage, which eliminates the occurrence of spurious error signals at the outputs of the integrators 10 and prevents the reference voltages from entering the device output. To eliminate spurious signals at the outputs of the integrators 10 and to prevent the passage of the reference voltages to the output of the device, automatic switches 1, 11 and 12 are used, the operation of which is synchronized by the switching generator 13. 1 sludge.

Description

The invention relates to instrumentation, in particular, to devices for recording or recording information, and is an improvement to the auth. No. 781925

The aim of the invention is to improve the recording accuracy and simplify the process of reproducing information.

The drawing shows a diagram of the device.

The device contains a main automatic switch 1, recorder 2, adder 3, reference voltage sources 4, electrical model of device 5, negative characteristic converter 6, subtraction unit 7, selective amplifiers 8, phase-sensitive rectifiers 9, integrators 10, additional automatic switches 11 and 12, a switching generator 13, the automatic switches having a moving contact 14 and fixed contacts 15 and 16.

The device works as follows.

The electrical model of the device 5, made of highly stable elements, is a functional unit whose dynamic characteristic coincides with the nominal dynamic characteristic of the recorder. When setting up the device during its manufacturing, the frequency ranges of the amplitude-frequency characteristic (AFC) of the recorder 2 are controlled. To this end, it contains a controllable element in each sub-band, and the choice of the conversion factor of the converter 6 with the foot-frequency characteristic is equal to There are no signals at the inputs of the subtraction unit 7, as a result of which at its output, as well as at the output, of all the integrators 10.

A change in the environmental conditions, as well as the aging of the device elements, leads to a change in the frequency response of the recorder 2. In one of the switching cycles in the automatic switches 1, 11, 12, which are controlled by the switching generator 13, the movable contacts 14 are connected to the fixed contacts 15 and 16. In this case, the reference voltages generated by the sources 4, through the adder 3, are fed to the recorder 2 and to the electrical model of the device 5. From the last output, the signal goes to one of the outputs of the subtraction unit 7, From the output of the recorder 2 through a negative characteristic transducer 6 is fed to another input of subtraction unit 7, from the output of which the differential signal simultaneously enters the inputs of all selective / amplifiers 8, the outputs of which are connected to one of the inputs of phase-sensitive rectifiers 9. Each selective amplifier 8 is tuned to the frequency of that reference voltage that is applied to the second input of the corresponding

phase-sensitive rectifier 9. Due to the equality of the voltage frequencies at the inputs of the phase-sensitive rectifiers 9, their outputs contain a constant component that is integrated by the integrator 10, affects the corresponding controllable element of the recorder 2, restoring the original appearance of its frequency response in the corresponding frequency sub-band. In this half cycle switching input

the device signal does not reach the recorder 2, since the automatic switch 1 pins 14–16 are open and the reference voltage from the output of the recorder 2 does not reach the output terminal of the device’s terminals, since contacts 14–16 are open at the automatic switch 12.

In the second switching period in the automatic switches x 1, 11, 12, contacts 14-16 are closed. At the outputs of the integrators 10

there are no signals, since the selective amplifiers 8 are switched off by the automatic switch 11 from the subtraction unit 7. The input of the recorder 2 receives the input signal of the device, which through the automatic switch 12 passes to the output of the device.

In the following, the process is repeated.

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Claims (1)

Invention Formula A device for recording information on the author. No. 781925, which is based on the fact that, in order to improve the recording accuracy and simplify the information reproduction process, two additional automatic switches and a switching generator, the outputs of which are connected to the control inputs of the main and additional automatic switches, are introduced into it. In this case, the output of the subtraction unit is connected to the inputs of the selective amplifiers through one of the additional automatic switches, and the output of the recorder and the input of the converter from the negative characteristic connected to the output terminal through another additional automatic switch.