SU1325675A1 - Pulse duration shaper - Google Patents

Abstract

The invention may be used in automation and computer technology. The purpose of the invention is to increase the stability of the duration of the output pulse. The shaper contains the counter 1 and the element SHSh-NOT 2, the introduction of the trigger 3 and not exceeding the duration of the trigger pulse of the period of the input clock frequency provides a stable output pulse. 1 il. . i (L

Description

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

The purpose of the invention is to increase the stability of the duration of the output pulse.

The drawing shows a structural diagram of the pulse width driver

Ces unit is the beginning of a form an output impulse.

From the inverse output of trigger 3, a logical zero arrives at the input 5 of transferring counter 1, removes the block from it, and with the arrival of the next clock pulse at the counting input of counter 1, running for subtraction, the code in it decreases by one when it arrives

Shaper pulse duration of each subsequent clock

Sov. contains a counter 1, the element OR - NOT 2, the trigger 3, the first 4 and the second 5 input bus of the driver. Information inputs and razimpulsa input, and so on until zeroed.

At the moment of zeroing of the counter 1, a signal of a logical unit appears at the output of the element OR-NOT 2, which

The decision to install counter 1 connects 5 triggers trigger 3, while being connected to the first input bus A, the output output of trigger 3 is the signal input of counter 1 connected to the second bus 5 of the driver. The outputs of counter 1 are connected to the inputs of the ele20

Mint OR NOT 2.

In addition, the output of the element OR- NOT 2 is connected to the input of the Trigger zero, 3, the counting input of which is connected to the second bus 5 of the driver, the information input to the power bus, the inverse output is connected to the transfer input of the counter. 1, and the direct output is the output 6 of the former.

The shaper works as follows.

In the initial state, counter 1 is zeroed out and blocked by the transfer input by a signal of a logical unit coming from the inverse output of trigger 3 held in the zero state by a signal of a logical unit coming from the output of the OR-NOT 2 element to the counting inputs of counter J and trigger 25

Logical zero, which indicates the end of the formation of the output pulse, at the same time from the inverse output of trigger 3, the signal of a logical unit arrives at the transfer input of counter 1 and blocks it until the next start pulse arrives.

Thus, at the output 6 of the device, a pulse is formed, the duration of which is proportional to input-; Nomu code.

as a counter can be

30 used microcircuits of type 564, IEI, 564 IE14, etc. It should be noted that in order to obtain a stable output pulse, the duration of the trigger pulse must not be longer than the period of the input clock frequency.

Invention formula.

The pulse width former containing the counter and the element Hera 3 from the second input bus 5 is post-40 OR NOT, the inputs of which are connected to the clock signal. The counter inputs, informational formation inputs of the counter 1 post inputs and the installation enable input disappear from the first input bus 4, the code of which is connected to the first input corresponding to the specified long imaging bus, and the counting output pulse .45 The input is to the second bus of the imaging device. With the arrival at the input of the resolution, the device differs in that, from the setting of the short pulse counter 1, in order to ensure the stability of the duration of the start, the output pulse is written into it, the input pulse is entered into it. In this case, the output element is a trigger, whose counting input

50 is connected to the second input bus of the imaging unit, the information input is connected to

This OR-NOT 2 signal appears a logical zero, which removes the zeroing from the trigger 3. When a third clock pulse from the second input pulse arrives at the counter input 3

power bus, R - input - to the output of the element OR NOT, the inverse output is connected to the transfer input of the counter.

bus 5 shaper at the forward exit 55 and the forward exit is the output of the trigger for 3 appears at the logic level.

VINILI Order 3123/54 Circulation 901

Random polygons pr-tie, Uzhgorod, st. Project, 4

Ces unit is the beginning of a form an output impulse.

From the inverse output of the trigger 3, the logical zero signal is fed to the input 5 of the transfer of counter 1, the block is removed from it, and with the arrival of the next clock pulse to the counting input of the counter 1 working on the subtraction, the code in it decreases by one when the trigger 3 is received, at the same time, at the forward output of trigger 3, a signal appears

Logical zero, which indicates the end of the formation of the output pulse, at the same time from the inverse output of trigger 3, the signal of a logical unit arrives at the transfer input of counter 1 and blocks it until the next start pulse arrives.

Thus, at the output 6 of the device, a pulse is formed, the duration of which is proportional to input-; Nomu code.

as a counter can be

ICs such as 564 IEI, 564 IE14, etc. are used. It should be noted that in order to obtain a stable output pulse, the duration of the trigger pulse must not be longer than the period of the input clock frequency.

Invention formula.

power bus, R - input - to the output of the element OR NOT, the inverse output is connected to the transfer input of the counter.

Subscription

Claims (1)

Claim A pulse width generator containing a counter and an OR-NOT element, the inputs of which are connected to the outputs of the counter, the information inputs and the installation enable input of which are connected to the first input bus of the driver, and the counting input to the second bus of the driver, which differs in that, with in order to increase the stability of the output pulse duration, a trigger is introduced into it, the counting input of which is connected to the second input bus of the driver, the information input to the power bus, R the input to the output of the OR-NOT element, the inverse output is soy dynamin with the counter transfer input, and the direct output is the output of the shaper. VNIIIPI Order 3123/54 Mintage 901__ Custom polygr. ave, city of Uzhhorod, st. Project, 4