SU699550A1 - Information recording apparatus - Google Patents

Description

one

The invention relates to a magnetic recording technique and can be used when recording code information on magnetic media.

A device comprising a control unit, an information input unit, a switch connected to an input unit and a control unit, a clock signal generator also connected to an input block and a control unit, and a recording unit 1 are known. However, this device does not have sufficient speed of recording information .

It is also known a device 2 comprising a control unit, an information input unit, a switch connected to an input unit and a control unit, a clock signal generator also connected to the input unit and a control unit, a recording unit, a frequency modulator and a generation unit, one output of which is connected to the recording unit, another output to the control unit, and the input to the output of the frequency modulator, the input of which is connected to the output of the switch.

The drawback of the device is the limited amount of information that

can be converted into the time interval between two successive drops of the recorded signal, and, therefore, limiting the speed of recording information.

The aim of the invention is to reduce the time of registration of information.

Claims (2)

For this purpose, a device for recording information, comprising a serially connected input unit, a switch and a recording unit, as well as a clock generator connected to the second input of the input unit and through the control unit to the second input of the switch, is equipped with a conversion unit connected between the output of the switch and the input the recording unit, as well as serially connected with the third input of the switch, the master oscillator and the frequency divider; the output of the master oscillator is connected to the second inputs of the conversion unit audio and control unit, the second output of which is coupled to the third input converting unit, whose output is connected to the third input of the control unit. FIG. 1 shows a block diagram of the proposed device; in fig. 2 is a timing diagram explaining his work. The device comprises a control unit 1, an information input unit 2, a switch 3 connected to the input unit 2 and the control unit 1, a 4 clock signal generator, also connected to the input unit 2 and the control unit 1, the recording unit 5. . The device is equipped with a conversion unit b, a master oscillator 7 and a frequency divider 8. The output of frequency divider 8 is connected to switch 3. The output of master oscillator 7 is connected to the inputs of frequency divider 8, control unit 1 and conversion unit b. Two other inputs of the conversion unit b are connected to the output of the switch 3 and the second output of the control unit i. The output of block 6 is connected to the input of block 5 of the record and the input of block 1 of control. The device operates as follows. The generator signals 4 and the codes of the channels 9 are connected in series through the input unit 2 by the switch 3 to the input of the conversion unit b, which directly converts the recorded code information into the duration of the time intervals between successive voltage drops. In block b, the number of units in the code word is compensated by pulses (TO) from generator 7, the frequency of which signals are higher than the frequency of signal generator 4. The compensation time determines the duration of the intervals into which the input codes are converted. Compensation signals are supplied to the recording unit 5 and to the control unit 1, where, together with the signals of the generators 4 and 7, they are used to synchronize the operation of the switches 3 and the conversion unit b. The signals from generator 7 are divided in frequency, divide those in frequency 8 and, as reference signals (td,), are fed through switch 3 and conversion unit 6 into recording unit 5 at a time when there are no code words at the input of input unit 2, and serve to divide code words. The proposed device eliminates the need for preliminary conversion of code and information into analog and the use of a frequency modulator. The frequency modulator introduces an error when converting an analog signal from an information input unit to a period duration and thereby limits the amount of information that can be converted in a time span. The registration error with frequency modulation consists mainly of two components 2, and 12 2, respectively, conversion errors and errors due to the instability of the velocity of the magnetic carrier. For example, usually for serial equipment "Astra-2B e 2%; g, 1.5%; 2 0.5% (1). By eliminating the error component, it is possible to increase the number of bits of information contained in one period, to N, ent iog2-p (2), which, when accounting is (1) b, instead of N ent 1odg-4gp- (which, when accounting (1) gives The error in converting input information in the duration of time intervals in the proposed device is determined by the magnitude 2 t depending on the instability of speed and detonation of the magnetic media in recording and playback devices. It should be noted that the errors are due to the instability of the fronts and pulses of the b block The frequency and frequency of the generator 7 is usually several orders of magnitude lower than the angle A. Therefore, the amount of information that can be contained in one time interval between adjacent drops will be determined by the formula (2). Invention The device for recording information containing serially connected input block, a switch and a recording unit, as well as a clock generator, connected to the second input of the input unit and through the control unit to the second input of the switch, characterized in that, in order to reduce the time of registration information page, it is equipped with a conversion unit connected between the switch output and the record block input, and connected in series with the third switch input of the master oscillator and frequency divider, while the output of the master oscillator is connected to the second inputs of the conversion block and the control unit, the second output which is connected to the third input of the conversion unit, the output of which is connected to the third input of the control unit. Sources of information taken into account during the examination 1. Author's certificate of USSR No. 539315, cl. G 11 B 5/09, 1975. 2. USSR Author's Certificate No. 2359767, 1976 (prototype). and 5x5 ODDQ ufffO