SU873393A1 - Pulse package former - Google Patents

Description

(54) FORMULATOR PUTS PULSES

The invention relates to a pulse technique and can be used to produce a burst of pulses. A pulse shaping device is known which comprises two triggers, a counter and a delay element 1. A disadvantage of the known device is its complexity. The closest in technical essence to the present invention is a pulse sequencer, a counter, an element NOT, two NAND elements and a trigger, one input of which is connected to the input of the AND-NO element, the other input of which is NOT connected to the trigger output, but the output is directly and via a counter connected to the inputs of the second NAND element, the output of which is connected to another trigger input, the second input of the counter is connected to the third trigger input (2 The disadvantage of the known sequence generator impulses its complexity. The aim of the invention is to simplify the driver. The goal is achieved by the fact that in the driver a bundle of pulses contains a pulse counter, an AND-NOT element trigger and an NOT element connected between the output of the trigger and the second input connected to the first input of the trigger, and the output with the counting input of the pulse counter, the setup input of which is connected to the second input of the trigger, the output of the pulse counter is connected to the third input of the NAND element. FIG. 1 shows a functional diagram of the pulse builder; in fig. 2 - time diagrams of device operation. The former contains a counter 1, a NOT 2 element, an AND-HE 3 element and a trigger 4, the R input of which is connected to the input circuit 5 and to the input of the AND-NE element 3, whose other input through the NOT 2 element is connected to the single output of the trigger 4 and the output is connected to the counting input of the counter 1, in which the setup input is connected to the trigger input 4 and bus 6 clock pulses, the inverse output of the counter 1 is connected to the third auxiliary input of the element AND-NOT 3. The output of the element AND-3 3 is connected to the output 7 shaper.

The device works as follows.

The initial state of the counter 1, and the trigger 4 is set to a low level of the control signal, which is set on the input bus 5 (Fig. 2 b). As a result, at the unit output of the trigger 4, the inverse output of the counter 1 and at the output of the element. ION 3 is set to high levels, and NOT 2 is low at the output of the element. When a high level control signal is applied to the input bus 5, the trigger 4 is set to the zero state (Fig. 2c), when there are no clock pulses on the bus b (Fig. 2 a) and from the output of the NOT element 2 a high level allows the clock pulse to flow through the element 3 to the counting input of the counter 1 and to the output of the imaging unit (Fig. 2 d).

When filling the capacity of the counter 1 at the inverse of its output (Fig. 2 e), a low level appears, which blocks the output of clock pulses to the output 7 of the driver.

Thus, at the output 7 of the former, a packet of pulses is formed, the number of which is determined by the capacity of the counter 1. The former transmits whole pulses to the output 7.

Changing the level of the control signal to low corresponds to the setting of the elements of the former in the initial state.

The introduction of new connections allows us to simplify the circuit of the pulse former.

Claims (2)

1. USSR author's certificate 601810, cl. H 03 K 5/01, 1976. 2..Avtorskoe certificate of the USSR № 661745, cl. H 03 K 5/01, 1977 (prototype).