SU1239851A1 - Generator of the envelope of pulse train - Google Patents

Abstract

The invention relates to a pulse and measuring technique and can be used to form the envelope of a series of pulses in automation devices, in measuring communication technology. The purpose of the invention is improved forming accuracy. To do this, a driver containing a delay unit 1, an output trigger 2, a driver 3 short pulses, an input 4 of the driver, element 5, for this, an additional trigger 7 and element 8 for the delay. The former, in its particular solution, allows operation with long input pulses, well beyond the waiting interval. In this case, the output trigger 2 has a third input - information, connected to the input of the selector. The second input 13 of the trigger is a clock input, i.e. trigger 2 must be a D-trigger, 1K-trigger, etc. 1 C, ff, 3 np. i (L

Description

The invention relates to a pulse and measuring technique and can be used to form the envelope of a series of pulses in automation devices, in particular in measuring communication equipment.

The purpose of the invention is to increase the shaping accuracy and spread the range of durations of the input pulses.

- In FIG. Γ presents the functional diagram of the imager according to η, 1 Jarmula; in FIG. 2 is a functional diagram, the former of claim 2, of the formula J ka of FIG. 3 —former voltage plots.

The device (Fig. 1) contains a block 1 delay, an output trigger 2, a driver 3 short pulses, the input of which is input 4 of the device, an AND 5 element whose output is connected to the first input 6 of output trigger 2, an additional trigger 7 a delay element 8 connected between the output of the trigger 7 and the first input 9 of the element AND 5. The output of the pulse shaper 3 is connected to the input of the delay unit 1, the first input 10 of the element AND 5, and the first input 11 of the trigger 7, and the output of the delay 1 with the second input 12 of the trigger 7 and the second E1 INPUT 13 of the trigger 2,

When working with long input zeros, input 4 must be connected to; the third input 14 of the trigger 2. Then the second input 13 of the trigger is clock, and the third input 14 is informational. .

The shaper works as follows.

With the arrival at the input 4 of the device of the pulses of excess (Fig. 3), the driver 3 produces short pulses corresponding to the front of the input pulses (Fig. ЗЙ). These pulses trigger a 1 delay block.

If the interval of the following impulses is shorter than the delay time f 5, then the delay unit 1, starting each time again, does not have time to form an output pulse. In this case, the output pulses of the driver 3 set the trigger 7 to the state, 1 (FIG. 30), as a result of which an enable signal is given to the element 5, and the pulses of the driver 3 arrive at the first input 6 of the trigger 2, set it to the state

51i

The outputs of the trigger 2 are formed signals corresponding to the state of excess in the channel (Fig. 3. If one of the half-wave signal

the control frequency did not reach the trigger threshold Un (Fig. 30), then in the waiting interval, counted from the beginning of the previous pulse exceeding, there is no pulse exceeding. On

The output of the delay unit I through the time ti after the start appears a short pulse (Fig. 32), which is fed to the input 2 of the trigger 7 and the input 13 of the trigger 2 and resets them to the O position. From the input 9 of the And 5 element, the enable signal is removed, and the output trigger 2 starts the formation of the Understatement (Fig. 3j). The first impulse is taken after

fixing an underestimate re-starts block 1 delay and sets trigger 7 to position. Thanks to delay element 8, the enable signal from trigger 7 arrives at first

input 9 of the element And 5 with a delay of Gg, longer duration of the output pulse of the imaging device 3 - this pulse does not pass through the element And 5 (Fig. 3 e; f).

If there is no next transient in the sleep interval, then the output signal of the delay unit resets the trigger 7 to the O state and confirms the underestimate state.

flip-flop 2. If, on the other hand, the second pulse is by wils, then the delay unit 1 is reset and started again, and the output pulse of the driver 3 passes through the prepared

the element And 5 and sets the trigger 2 to state 1 - the end of the lowering is fixed

The device also allows to work with long input pulses, significantly exceeding the waiting interval (Fig. 2).

In this case, the output trigger 2 has a third input 14, informational 5 connected to the input of the selector. The second input 13 of the trigger is a clock input. Those. trigger 2 must be a trigger with logic on which: D-trigger, 1K-trigger, etc.

When a long pulse arrives at input 4, a delay unit 1 triggered along its front gives a short pulse I1 1 pulse to the second clock input 13 of the trigger 2, to the third control signal.

which 14 input pulse is applied. In case of such a coincidence, the clock pulse records in the trigger 2 information I-g the state of excess is recorded. If at the moment of formation of the output signal of the delay unit 1 of the prediction the output pulse has finished and the new one has not arrived, then in the trigger 2 the O is recorded - the underreporting condition is fixed. The remaining nodes work as in the main circuit.

In a specific implementation, the delay unit 1 can be triggered not by a pulse from the output of the imaging unit 3, but by a pulse from the imaging unit 15, whose input is input 4, and a short pulse is generated at the output when the input pulse of the selector descends. The formers 3 and 15 can be implemented in the form of a differentiating (shortening) or in the form of cascades with active elements. The delay unit 1 can be a single-oscillator or a counting circuit serviced in complex blocks and devices by one common clock generator. The delay element 8 in the simplest case is an integrating KS circuit.

Claims (2)

1. The envelope of the pulse wave envelope containing the block delay output trigger and shaper of short pulses, the input of which is the input of the shaper of the pulse train, element I, the output of which is connected to the first input output trigger, characterized in that, in order to increase the shaping accuracy, an additional trigger and a delay element are introduced into Het o, the delay element being connected between the output of the additional trigger and one of the inputs of the AND element, the second input of which is connected to the first pickup of the additional trigger , the input of the delay unit and the output of the pulse generator, and the output of the delay unit is connected to the second inputs of the output and additional triggers. 2. The feeder of claim 1, d - is characterized in that In order to expand the range of durations of the input pulses, the input of the short pulse generator is connected to the third (informational) input of the output trigger. e Well  excess Understating Editor A. Shandor Compiled by E, Surov Tehred RyoBoikalo Corrector E, Roshko Order 3408/56. Circulation 816 Subscription VNIIPI USSR State Committee for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5. production and printing company, Uzhgorod, st. Project, 4 t