SU1223291A1 - Device for digital magnetic recording - Google Patents

Abstract

This invention relates to digital magnetic recording devices. The purpose of the invention is to increase the credibility of the magnetic recording while ensuring the mutual exchange of information. The device contains a register 1, an input bus 2, a memory block 3, a driver 5 clock signals to the trigger. 6. The device also contains a binary counter 8, and the memory block 3 is provided with a control signal bus 9. A binary counter 8 and a trigger 6 are part of the control signal generator 12. The introduction of new elements and the formation of new connections between them allows one to achieve the goal of the invention. 1 il ..

Description

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

The purpose of the invention is to increase the reliability of a digital magnetic recording while ensuring the mutual exchange of information.

The drawing shows the proposed device for digital magnetic recording.

The device contains a register 1 connected by an input to the input data bus 2 and connected by outputs to the address inputs of a memory block 3 connected by other address inputs to the input buses 4 control signals, a driver 5 clock signals and a trigger 6. At the same time, the driver shaper 5 clock signals pbd- is connected to the input bus 7 of the siihrosignal.

The device also contains a binary counter 8, connected by a synchronization input and a load input, respectively, to the first and second outputs of the shaper 5 clock signals and connected by inputs of parallel recording with the outputs of the states of the memory block 3. The memory unit 3 is equipped with an additional control signal bus 9 connected to its control input. The transfer output of the binary counter 8 is connected to the synchronization input of the trigger 6, with the direct and inverse outputs of which the first and second output ports 10 and 11 are connected, respectively. The inverse output of the trigger 6 is connected to its information input and the second output of the driver 5 clock signals are connected to register 1, the binary counter 8 and the trigger 6 are part of the controlled shaper 12 of the write signal.

Digital magnetic recording using the proposed device occurs in the following manner.

According to the signal received from the input strip 7 of the clock signal, the driver of 5 clock signals amplifies the first and second pulse sequences. The first pulse sequence is fed to the synchronizing input of the binary counter 8. The second pulse sequence is fed to the loading input of the binary counter 8 and to the ... register 1. In register 1, the current code is stored

states and the next bit of information received on the input bus 2 data The memory block 3 generates a status code that enters the register 1. Signals from the codes of the register 1 and control signals arriving on the input buses 4 are sent to the address inputs of the memory block 3 control signals. The first control signal determines whether information is being recorded or a block of data is being marked. The second control signal determines whether the record is being recorded in a modified phase-modulated manner or twice-modified phase-modulated method. The third control signal determines whether a record is made with an information density of 1 bit per symbol or with an information density of 0.5 bits per symbol. In addition, the control input of the memory unit 3 receives a fourth control signal, which selects an information word containing the control code and the status code.

When a pulse of the first sequence of pulses arrives, the processed state signals in register 1 are stored as a state code and the control code is loaded into the binary counter 8 in accordance with the control signals of memory block 3. Each state code corresponds to a certain information that must be recorded on a magnetic recording medium. This information contains information about whether a signal transition corresponding to an information unit or an auxiliary signal transition should be recorded during coding, or there should be no signal transitions at all, as well as the necessary amount of overcompensation. Depending on the next bit of information, a transition occurs from the current status code to one of the two subsequent status codes, the control signal codes are loaded into binary counter 8 at the beginning of each clock cycle, and 14 pulses of the first pulse sequence are received between the pulses of the second pulse sequence. When the next pulse of the second pulse sequence arrives, a new binary counter 8 is loaded, which acts on trigger 6. From the direct and inverse outputs of trigger 6, information arrives on the first and second output tires 10 and 11.

Claims (1)

Invention Formula A device for digital magnetic recording containing a register connected by an input to an input data bus and connected by outputs to an address input of a memory unit connected by other address inputs to input control signal buses, a driver of clock signals connected by an input to an input bus of a sync signal, trigger and first and second output buses, characterized in that, in order to increase the reliability of the digital magnetic recording while ensuring mutual exchange of information, a binary counter is inserted in it, connected by a synchronization input and a load input, respectively, to the first and second outputs of the clock signal generator and connected by inputs of parallel recording to the outputs of the signals of the state of the memory unit equipped with an additional control signal bus The direct and inverse outputs of the trigger are connected respectively to the first and second output buses, and the transfer output of the binary subkey counter to the synchronization input of the trigger, the inverse output of which is connected to its information input, and the second output of the clock generator is connected to the register.