SU1162025A1 - Pulse shaper - Google Patents

Description

The invention relates to impuls technology, can be used for digital control of the duration and repetition period of the pulses.

Known pulse shaper, 5 containing a counter, a trigger, an OR element, two sensor codes, two comparison units, a switch [}.

The disadvantage of the device is low reliability, due to the fact that, firstly, a large number of functional elements are required for its implementation, and secondly, the counters are connected to comparison units by means of a large number of links, the number of which is determined by the digit capacity of the counters.

The closest in technical essence to the invention is a device containing the first and second 20 counters, the first and second code sensors, the OR element and the trigger whose outputs are the device outputs, the third counter, the third code sensor, the first, second and third blocks. ki comparison, the first and second elements And [Y].

The disadvantage of this device is its low reliability, due to the large number of functional 3θ elements and a large number of links between the counters and comparison units.

The purpose of the invention is to improve the reliability of the device by reducing the number of functional elements and the number of interconnects.

This goal is achieved by the fact that in the pulse former containing the first and second counters 40, the first and second code sensors, the OR element and the trigger, the subtracting inputs of the first and second counters are connected to the input bus, the information inputs of the first counter are 45 yen counters the outputs of the first sensor codes, the information inputs of the second counter are connected to the outputs of the second sensor codes, the launch bus through the OR element is connected to the inputs of the record 50 of the first and second counters and the δ input of the trigger, the output of the first counter overflow and is connected to the second input of the OR gate, and a second counter overflow output 55 is connected to K input of flip-flop.

FIG. 1 shows a block diagram of a pulse shaper; on

FIG. 2 - time diagrams explaining his work.

The pulse shaper contains the first and second counters 1 and 2, the first and second sensors 3 and 4 codes, element OR 5, trigger 6, input bus 7, start bus 8, first and second outputs 9 and 10. Subtract inputs of the first and second counters 1 and 2 are connected to the input bus 7, the information inputs of the first counter 1 are connected to the outputs of the first sensor codes 3, the information inputs of the second counter 2 are connected to the outputs of the second sensor codes 4, the start bus 8 via the OR 5 element is connected to the write inputs of the first and second counters 1 and 2 and with 5 input trigger 6, o d overflow of the first counter 1 is connected to a second input of OR gate 5, and the output of the second overflow counter 2 is connected to the K-input of flip-flop 6.

Pulse shaper working

in the following way.

The information inputs of the first counter 1 from the outputs of the first sensor codes 3 receives the code of the repetition period of the generated pulses, and the information inputs of the second counter 2 from the outputs of the second sensor codes 4 receives the code of the duration of the generated pulses. Initially, the period and duration codes are recorded in the counters 1 and 2 according to the signal coming over the trigger bus 8 (Fig. 26). For the same signal, the trigger 6 is set to the initial (single) state (FIG. 2 e).

Further, the codes are recorded automatically by the signal from the overflow output of the first counter 1 (Fig. 2c). For example, suppose that code 9 (r] is recorded in the first counter 1 and code 2 in the second counter 2 ( ₂ }) 7, the subtractive inputs of these counters (Fig. 2a) reduce their contents by one. the output of the overflow of the first counter 1 (Fig. 2c), appearing at the post lyze tenth pulse on the input bus 7, sets the flip-flop 6, in one state, and

1162025

overwrites the codes of the period and duration of the generated pulses in the first and second counters 1 and 2. Next, the formation cycle repeats.

If it is necessary to change the period 5 or the duration of the generated pulses, the information inputs of counters 1 and 2 from the outputs of sensors codes 3 and 4 are supplied with corresponding codes, which are recorded in the counters at the 10th end of the next cycle, according to the overflow signal of the first counter. During operation of the pulse shaper, the period and duration of the output pulse sequence can be controlled by any given algorithm.

The gain in the amount of equipment when applying the proposed pulse shaper compared with the prototype is 50%.

Thus, in the proposed device, reliability is improved by reducing the number of functional elements and the number of inter-block links.

Claims (1)

PULSE FORMER, containing the first and second counters, the first and second code sensors, the OR element and the trigger, is distinguished by the fact that, in order to increase reliability, it subtracts the inputs of the first and second counters connected to the input bus, information inputs The first counter is connected to the outputs of the first sensor codes, the information inputs of the second counter are connected to the outputs of the second sensor codes, the launch bus through the OR element is connected to the recording inputs of the first and second counters and 8-trigger input, overrun output the first counter is connected to the second input of the OR element, and you, the overflow stroke of the second counter is connected to the K-input of the trigger. 1 > ι 1162025 ²