SU661745A1 - Pulse train shaper - Google Patents

Description

I

The invention relates to a pulse technique, can be used in automation devices and computing devices.

A pulse trainer is known that contains a trigger, the output of which is connected to the input of counter 1 via a matching element.

This driver has a distorted pulse at the output from an incomplete superposition of the starting and clock pulses.

Closest to the proposed form, Tel sequence of pulses, containing a counter and trigger 2.

The known device has a low functional reliability.

The purpose of the invention is to increase the functional reliability of the device.

This goal is achieved by the fact that a NOT element and two NAND elements are entered into a pulse sequence generator containing a counter and a trigger, one trigger input is connected to the input of the NAND element, the other input of which is NOT connected to the trigger output, but the output directly and through the counter is connected to the inputs of the second NAND element, the output of which is connected to another trigger input.

FIG. Figure 1 shows a structural electrical circuit of a pulse trainer; in fig. 2 shows a diagram of his work.

The device contains a counter 1 and a trigger 2, the input of which is connected to the input of the element AND-NO 3, another input of which through the element NOT 4 is connected to the output of the trigger 2, and the CALL - directly and through the counter connected to the inputs of the element AND-NOT 5, which in turn

connected to another trigger input 2.

The device works as follows.

In the initial state, the counter 1 and the trigger 2 are set to a low input signal level (Fig. 2 b), and the clock frequency pulses (Fig. 2 a) do not pass the generator output through the AND-NOT element 3, at the other input of which the inhibitory potential from the output element is NOT 4 (Fig. 2d).

When a high level input signal is applied, the trigger 2 changes its state (Fig. 2c), and the clock pulses go through the AND-NE 3 element to the input of counter 1 (Fig. 2e) and to the output of the imager.

When the meter's capacity is filled, the potential from its output (Fig. 2e) is fed to an AND-HE element 5, from the output of which, after the last clock pulse, the potential (Fig. 2g) enters the switching of trigger 2, which through HE 4 prohibits the flow on the output of the next clock pulse pulse.

In the event that the leading edge of the high level of the input signal coincides with the clock pulse, trigger 2 switches from the initial state only after the end of the indicated clock pulse, and the next clock pulses arrive at the output of the driver.

Thus, at the entrance, the form pulse forms a "burst of pulses, the number of which is determined by the capacity of counter 1, and the appearance of a distorted output pulse is excluded.

Changing the input level to low corresponds to resetting the counter.

Claims (2)

1. E. Glisis. Information Transformers, M., Energie, 1975, fig. 6-8. 2. USSR author's certificate No. 443469, H 03 K 5/01, 1973. ) -JUi q Ji-ri n AlaZ S sSbiirtS j Rig. one -1pp | i J 2