SU758498A1 - Pulse duration shaper - Google Patents

Description

one

The invention relates to a pulse technique and can be used in devices that are part of automatic control systems.

A pulse shaper is known that contains a static trigger, an integrating chain, and an IYidt trigger; the static trigger output is the output of driver 1.

This pulse shaper generates pulses of a given duration from signals having a duration both longer and shorter than a predetermined duration, and without making requirements to limit the duration of the fronts of the input pulses. The disadvantage of it is that in the case. When the duration of the input signal exceeds the specified duration of the signal, the input signal causes the static trigger to be

in an unstable state for a time equal to the difference between the durations of the input and output signals. In addition, the known pulse shaper produces pulses of only one specific duration.

Of the known pulse width formers, the most close to the IMF of a technical entity is a driver containing a counter, the input of which is connected to the clock pulse generator via a key, the control input of the key is connected to the output of the actuator, which input is connected to the trigger output through the OR element is connected to the sources right. pulses, the encoder, the outputs of which are connected to the sources of control of the pulses, the output of the encoder is connected to the inputs of the installation of the counter, the output of the higher bit of which is connected to the second input of the trigger 25,

This pulse shaper generates pulses of different (many) specified durations with their high stability.

30 and synchronization accuracy. However in

The known pulse shaper has limitations on the duration of the input pulses, which must be less than the total response time of the OR element, the trigger and the actuator.

 In the case when the duration of the input pulses is longer than the specified time interval, the known generator cannot perform its functions for a time equal to the difference between the duration of the input pulses and this time intertak as in this case,

Tick received simultaneously clock and code pulses. In addition to this, the well-known pulse shaper does not have the functional ability to produce a series of pulses of one given duration with one input signal;

The purpose of the invention is to expand the functionality of the former.

This is achieved by the fact that, in a pulse width driver containing a serially connected clock, an element AND, a counter and a trigger, the first output of which is connected to the second input of the element AND, an element OR whose output is connected to the second input of the trigger which are connected to the outputs of the sources of control pulses, and the outputs - to the inputs of the installation of the counter, the second output of the trigger is connected to the control input of the encoder, the outputs of which are connected to the inputs of the element OR-,

The drawing shows the block diagram of the shaper.

The pulse width former contains an encoder 1, a counter 2, a generator of 3 clock pulses, an element 4 AND, an element 5 OR, and a trigger b.

The formulator works as follows. A signal that a trigger is enabled (for one or another duration comes to the input of the encoder). Encoder 1 converts this signal, arriving as a voltage pulse through the corresponding bus, into a binary code. The value of this code is dependent on the required duration of trigger triggering. 6. The code is written to the counter 2. At the same time, the signal at the output of element 5 OR sets trigger one in one state. In this case, trigger 6 blocks information inputs of the encoder 1 trigger 6 for a particular duration, and opens the element 4 AND, through the element 4 And the pulses from the generator 3 tact pulses begin to flow on, the counting input

counter 2. After a time interval, the duration of which depends on the number recorded in counter 2, the latter overflows, and a signal about this goes to the input of the installation in the zero state of trigger 6. At

5 this element 4 and closes, and the encoder 1 opens. If at the same input of the encoder 1 there is still a signal that the trigger B is turned on for the same duration, then the shaper's operation cycle is repeated. At the single output of trigger b, when ajroM is received, a series of pulses of one given duration with one input signal is obtained.

5 As a result of the use of new connections, the functionality of the pulse width generator is expanded.

Claims (2)

Invention Formula Shaper pulse width, containing sequentially connected clock generator, element-I, a counter and a trigger, the first output of which is connected to the second input of the element AND, an OR element whose output is connected to the second input of the trigger, and an encoder whose information inputs are connected to the outputs of the sources of control pulses, outputs to the inputs of the installation of the counter, characterized in that, in order to expanding the functionality of the driver, the second trigger output is connected to the control input of the encoder, the outputs of which are connected to the inputs of the OR element. Sources informi 1, taken into consideration pri.expertise 1, USSR Author's Certificate 329663, cl. H 03 K 5/04, 1970. 2. USSR author's certificate number 502493, cl. H 03 K 5/04, 1974. CT