SU951682A2 - Pulse train envelope pulse shaper - Google Patents

Description

() FORMER OF A PULSE BENDING A SERIES OF PULSES

The invention relates to the field of pulsed technology and is intended to form with a high degree of accuracy a pulse enveloping a series of pulses, and may find application in telemetry systems and automation devices. According to the main author. St. ff is known: a pulse former enveloping a series of pulses containing a reference frequency generator, a key, a counter and a trigger, as well as a setup pulse shaping unit, a census block and a period setting unit, whose outputs through the census block are connected to the remaining meter inputs, respectively. Moreover, the output of the reference frequency generator is connected to the fifth input of the forming pulse forming unit, the first output of which is connected to the (n - "- 1) th input of the census block, and the second output is connected to the second trigger input, the output of which is connected to the second input key 1. However, in some cases it is necessary to form pulses, envelopes of distinctive series, the periods of the pulse following which vary from series to series (within the series, the period of the pulse following is constant). In a known device, in such a situation, it is necessary to rebuild the unit master, which does not allow for the prompt generation (without losses during the period measurement time and unit tuning) to generate output pulses. The aim of the invention is to increase the speed of the device under the conditions of a change in the pulse period from one series to another. The goal is achieved by the fact that in a pulse shaper enveloping a series of pulses containing a series connected reference frequency generator, a key, a counter and

39516824

the trigger, the shaping unit, the installer, runs the following pulse pulse, the census block and in a way.

a period sensor whose p outputs through the census block is connected to the remaining counter inputs, respectively, and the output of the reference frequency generator is connected to the first input of the setup pulse formation block, the first output of which is connected to the (n + 1) th input of the census block, and the second output is connected with the second trigger input, the output of which is connected to the second key input, the period setter is designed as an additional pulse counter, the counting 15 of which is connected to the output of the key, and the first and second groups of the inputs are connected respectively to the second output of the pulse shaping unit and the output of the main counter. The drawing shows the functional diagram of the pulse former. The pulse shaper contains an input bus 1, a generator 2 of the reference frequency, a key 3, a main counter, an additional counter (set period) 5, block 6 of the census, block 7 of forming a setting pulse. trigger 8, the output 9 of which is the output of the device. The device input bus 1 is connected to the first input of the installation impulse formation unit 7. The output of the reference frequency generator 2 is connected to one input of the key 3 and the third input of the forming unit 7. The output of the key 3 is connected to the counting inputs of the main counter 4 and the additional counter 5, the outputs of which are connected to the first inputs of the census block 6, the (n + 1) input of which is connected to the first output of the formation block 7, the second output of which is connected to the first installation the input or the first group of installation inputs of the additional counter 5 and the second input of the trigger 8, the output of which is connected to another input of the key 3 and the output 9 of the device. The output (for the overflow signal) of the main counter is connected to the second installation input or the second group of installation inputs of the additional counter and the first input of the trigger 8. The outputs of the census block 6 are connected to the installation inputs of the main counter k, respectively.

The first half-cycle of the reference frequency pulse, which binds the first pulse of the series, coming from the input bus 1, makes a forced recording from the additional counter 5, the initial state of which is 11 .. L, through block 6 of the census c. the main counter k of the magnitude of the return code corresponding to the maximum possible period of the pulse sequence.

By the second half-period, the trigger 8 is overturned and an additional counter 5 si is installed | - from the second output of the shaping unit 7, arriving at the first group of installation inputs of the additional counter 5, to a state greater than zero by some additive. At the output of the trigger 8 and the output 9 of the device, an impulse enveloping the series is formed. At the same time, key 3 is opened, and the reference frequency pulses fill the counters and 5. Before the counter k overflows, the second pulse of the series arrives from the input pin 1 in the formation unit 7. The first half-cycle of the reference pulse imposes a second pulse of the series. to the input of the control unit 6 of the census, sets in the counter actually counted by counter 5 (taking into account some additives during installation) the value of the return code of the period T of the series of pulses. The second half-period of this reference pulse confirms the inverted state of flip-flop 8 and again sets counter 5 to a state that is greater than zero by some additive. The process of forming the trigger 8 of the pulse enveloping the series continues until the series of pulses coming from the input bus is completed. The arrival of a series of pulses in the formation unit 7 is stopped. In this case, having counted the last number recorded in counter k from counter 5 (period of series T. with allowance for additive), counter k overflows (zeroed). The overflow impulse of the counter k returns to the initial state the trigger 8 and sets the state 111 ... 1 to the counter 5. The signal from the output of the trigger 8, acting on the control input of the key 3, closes

59

the arrival of pulses of the reference frequency at the inputs of the counters and 5.

The pulse that goes around the pulse train ends.

With the advent of the first impulse of the new series, the pulse period in which the process has changed is repeated, with an additional counter. 5 counts the number of reference frequency pulses corresponding to the pulse repetition period of the newly received series.

The counting volume of the counters C and 5 is selected taking into account the overlap in the number of pulses of the reference frequency (with some addition). The whole possible range of variation of the pulse following period in the series.

The proposed pulse shaper is characterized by an increased (as compared with the prototype) high-speed response under conditions of a period change. following impulses of series to series about

In addition, the accuracy of the formation of the pulse of the envelope is preserved in this device, since it is continuous.

but for each series of pulses, as it arrives, the period of the pulses inside the series from pulse to pulse is calculated. five

Claims (1)

1. USSR author's certificate ff, cl. , H 03 K 5/156, 01.30.78,