SU545075A1 - Variable Time Shaper Driver - Google Patents

Description

one

The invention relates to a pulse technique and can be used to form an impulse delay relative to a reference signal.

A shaper of a variable time delay is known, comprising a series-connected master oscillator, a first element I, a counter connected to the output of the master oscillator, a driver of a reference signal, a first trigger with separate inputs, a switch for controlling the delay variation.

However, this driver has insufficient reliability due to its complexity.

The aim of the invention is to improve reliability.

For this, in the proposed inverter of a variable time delay, the input element is NOT, three PI elements are on the second trigger with separate inputs, and the generator output is given by the EH, ero generator through the element is NOT connected to the first input of the second element AND and to the second input of the first trigger, the first input of which connected to the output of the counter, its first output is connected to the second input of the second PI element and to the first input of the second trnger, the output of which is connected via the third element I to the second input of the first And element, the second output of the first trnger h Res II fourth element is connected to the "Set counter ednnitsy free BTopbie fourth inputs of the third n soedppeny II elements with respective outputs nereklyuchatel nairavleni varying delay. The drawing shows the structural electrical circuit of the proposed variable time delay generator.

Shaper contains master oscillator 1, elements 2-5 AND, counter 6, driver 7 of the reference spgnal in the form of a series 8 inverter and frequency divider 9, triggers 10 and 11, non-switch 12

the directions of the modified delay, the element 13 is NOT, and the output of the generator 1 is connected to the inputs of the elements 2, 13 n of the driver 7, the output of the element 2 via the counter 6 is connected to the first input of the trngger 10, the second input of which is connected to the first input of the element 5 and the output of the element 13, the first output is via element 3 to the auger "Setting the unit of the counter 6, and the second output to the second inputs of the 5 n element of the trnger 11, the first input of which is connected to the output of the element 5, and the output to the first input of the element 4, the output of which is connected to the second input element 2, and the second input - with the first input of the switch 12, the second input of which is connected with the second input of elsmept 3.

For 1nvvatel-works as follows.

Let switch 12 be set in such a way that element 3 is closed, elements 4, 2 are open, and some number is recorded in counter 6 (for definiteness 3), while the capacity of the counter 6 and the divider 9 are equal to 5. Then after the arrival of two pulses counter 6 is reset and, at its output, overflow overflow voltage Vnts. This name 11) affects the input of the trigger 10, the second input of which affects the pulse transmission from the generator 1. Consider that the impulse at the output of counter 6 has a longer duration than the pulses from the generator 1, due to the finite time spreading in the counter 6 in the counter 6 it can be concluded that at the end of the next pulse from generator 1, trigger 10 on the second output will be set to zero. The signal from the trigger output will set the trigger 11 on the nerve output to the single state, which, having passed through element 4, will close element 2. The trigger 11 will be held in the specified state until the normal pulse from generator 1. The pulse from element 13, the leading edge will set the thonger 10 to the initial state. Now, two inputs are applied to the inputs of element 5, as a result of which element 5 has a zero potential, which returns the AND trigger to the initial state.

Thus, at the output of the trigger I, a gate was formed, which is applied to the input of element 2 and prohibits the passage of the next pulse to the input of counter 6. The emuls at the output of the ten-meter counter is only after six periods of the input sequence. Thus, if in the first cycle the time shift between the reference pulse at the output of divider 9 and the delayed pulse at the output of counter 6 is equal to 2t, where m is the period of the pulse of generator 1, then in the second cycle the time shift between on-pulse and delayed is 3m . Next shaper works

the same way. Thus, varying increasing time intervals are formed. Similarly, the shaper operates at a different position of the switch.

The amplification of the device is due to the fact that when forming a variable increasing delay from the number of pulses, the input 1, their input to the counter 6, is subtracted

and the formation of a varying decreasing delay is equal to one pulse. This simplification is expressed in the fact that there is no need for a reversible counter, a comparison circuit of two codes.

counters.

Claims (1)

1. Auth. St. USSR number 295194, cl. N OZK 5/153, 1969.