SU1599893A1 - Pulse shaper for precise magnetic recording - Google Patents

Abstract

The invention relates to the accumulation of information and can be used for generating recording pulses on magnetic media, for example, in devices of precise magnetic PWM and FM recording, as well as in digital magnetic recording devices. The aim of the invention is to increase the magnetic recording density. The goal is achieved due to the formation of different-polarity pulses with strictly constant volt-second (ampere-second) areas due to the use of one single-oscillator 7 in the formation of different-polarized recording pulses and the logical features of operation of the trigger 8. 2 Il.

Description

The invention relates to the accumulation of information, namely to a pulse shaper for accurate magnetic recording.

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

FIG. 1 shows a structural diagram of a pulse former for accurate magnetic recording; in Fig. 2. - time diagrams of his work.

A pulse shaper for accurate magnetic recording contains an inverter 1 connected by an input to input tire 2 and to the first input of the first element AND 3 and an output to the first input of the second element AND 4. The pulse shaper for precise magnetic recording also contains the element OR 5 connected by inputs to the outputs of the first and second elements And 3 and 4 to the magnetic

the recording head 6, the one-shot 7 and the trigger 8. The trigger 8 is connected to the synchronous oIch input by the one-shot .7 to the output of the element OR 5, the information input to the output of the inverter 1, the output from the second input of the first element AND 3 and the inverting output to the second input the second element and 4.

A pulse shaper for accurate magnetic recording. Works as follows.

The input signal 2 of the information signal, for example, receives a 1CHM signal (either a 4-signal or a pulse-code signal). Let trigger 8 na .; goes in a single state (Fig. 2e), then on the signal of the first element I 3.- signal 1 (Fig. 2, b), which through the element OR 5 (Fig. 2d) starts the one-shot 7 (Fig. 2e) . The signal at the output of the one-shot 7 led

with so

00

with

00

The clock signal for the trigger 8 is set. According to the forward signal phase (FIG. 2d), the trigger 8 is set to the state corresponding to the signal at the information input of this trigger 8, since in this case the signal at the output of the inverter 1 is O, therefore trigger 8 is set to

using the same one vibrator 7,

The signals at the outputs of the elements And 3 and 4 cause a current in the magnetic head. in the record (fig, 2g), while the directions of these currents are opposite.

Claims (1)

zero state, i.e. on its inverse shch formula of invention Signal 1 will set signal 1, and direct output 0 (FIG. 2e). The disappearance of signal 1 at the output of the trigger 8 leads to the disappearance of signal 1 at the output of the first element And 3 (Fig. 26). The occurrence of signal 1 at the inverse output of trigger 8 prepares the second element 4 for receiving a signal from inverter 1. When the input information signal is set at the time point O, the output 1 of the second element 4 turns on the signal 1 which through the element OR 5 starts the one-shot 7 (fig, 2d)., The positive front of which is written to the trigger B unit, i.e. at the output of the trigger 8 in Wits 1, and in the inverse output O, and this, in turn, will generate a signal at the output of the second element. And 4. It should be noted that the duration of negative pulses (Fig. 2e) are strictly equal to each other, since they are formed with 15 20 25 thirty Pulse generator for accurate magnetic recording, containing an invert connected with 1 input to the input bus and the first input of the first element AND and connected by an output to the first input of the second element AND connected by an output to the first input of the element OR connected by an output to the input of the monotrader and the second input - with the output of the first element I, as well as the magnet head of the recording, about the same and so that, in order to increase the magnetic recording, in it introduce a trigger connected by the information input to the output of the inverter with a single input to the one-vibrator output, an output to the second input of the first element AND and an inverting output to the second input of the second element AND, the magnetic head being connected to the outputs of the first and second elements I. using the same one vibrator 7, The signals at the outputs of the elements And 3 and 4 cause a current in the magnetic head. in the record (fig, 2g), while the directions of these currents are opposite. A pulse shaper for accurate magnetic recording, containing an inverter, is connected by 1 input to the input bus and the first input of the first AND element and connected by the output to the first input of the second AND element connected by the output to the first input of the OR element connected by the output to the one-input input and the second input - with the output of the first element I, as well as the magnetism of the recording head, that is, so that, in order to increase the density of the magnetic recording, a trigger is connected to it, connected by an information input to the output of the inverter, si hroniziruyuschim input - to the output odnovibra- torus output - to the second input of the first AND gate and invertiruyui1im output - to the second input of the second AND gate, and a magnetic recording head connected to the outputs of the first and second elements I. a i AT / L 7 g Fig 1 a) 6) &) 2) e) c) F) t. t. st (Reg. 2