SU691919A1 - High density digital magnetic recorder - Google Patents

Description

(54) DEVICE FOR. HIGH-DENSITY DIGITAL MAGNETIC RECORDING ..; ...: „

The newly added trigger and one input of the And element, the other input of which, as well as the trigger trigger input, are connected to the first output of the sending oscillator, and between the second 5 output of the master oscillator and the other stroke of the OR element are connected in series with a counting input a universal trigger, zero setup input which sub-Q keys to the output of the element I, as well as the newly-introduced pulse shaper and the direct input of the prohibition element, the inverse of the input of which is connected to the information device input. with

Figure 1 shows the structural diagram of the proposed device; in Fig. 2, time diagrams of his work. , . -

A device for high-density digital magnetic recording contains a master oscillator 1 with two outputs (FIG. 1). To one of the outputs of the generator 1 is connected to the synchronization input D - trigger 2. Delay; the other input of the trigger 2 is connected to the information input of the device. The output and the trigger input of trigger 2 are connected by a two-input element I 3. A universal trigger 4, a pulse shaper 5, a prohibition element 6, one input, a two-input element Ш1И 7, a counting trigger 8 are connected to another output of generator 1. and a block of 9 magnetic records. At the same time, the output of the two-input element AND 3 is connected in parallel with the zero setting input of trigger 4 and another input of the two-input element OR 7, and the zero input 40 of the prohibition element b is connected to the information input of the device.

 The input information binary sequence Vg (figure 2), in which the units are represented by the pulses themselves, and the zeros by the absence of pulses, goes to the delayed input of the trigger 2. At the same time, the synchronizing input of this trigger enters a double clock frequency generated by defining the gene er at m. 1. As a result, voltage V2 is formed at the unit output of flip-flop 2. Voltage Vj is gated by pulses on the two-input element IZ. The sequence of pulses V taken from the output of the And 3 element is the input information sequence delayed by half a cycle. By pulses of Vg odes, the setting of the universal trigger 4, which is started on the counting input syncro, to the zero state; pulses V / clock frequency,

from the other output of the voltage j taken from the single output of the flip-flop 4, a sequence of short pulses V5 is generated using the pulse shaper 5 pulses. The pulses Vg-are fed to the direct input of prohibition element b, the inverse input of which is fed to the input sequence Va.,.

The inhibitor 6 prohibits the passage of those impulses of a sequence V that coincide with the impulses Vg. The sequence of pulses V, removed from the output of prohibition element b, is summed with the pulses V on the element OR 7. The total sequence of pulses V is converted by the counted trigger 8 into the signal V, which is recorded on the magnetic media in the magnetic recording unit 9.

The proposed device differs from the prototype in its simplicity of circuit implementation. In particular, its implementation requires 4 packages of integrated circuits, while the implementation of the rototype requires 7 cases of integrated circuits.

Claims (2)

1. US patent 3774178, cl. 340-174.1, publ. K. 1973. 2. US patent number 3560947, cl. 340-174.1, publ. 1971 (prototype). . . , In / normal 0