SU1367141A1 - Shaper of train of bell-shaped pulses - Google Patents

Abstract

The invention relates to a pulse technique and can be used in test equipment. The purpose of the invention — an increase in the density of the following pulses of a bell-shaped form while simultaneously expanding the functional capabilities — is achieved by producing different polarized bell-shaped pulses with different intervals between them pre-coded. To do this, a driver that contains a sinusoidal signal generator 1, a first comparator 2, is an analog switch. 5, the AND element 8, the pulse counter 9 and the output bus 11, a second comparator 2, an attenuator 4, an inverting repeater 6, an alternating voltage source 7 and a low-pass filter 10 are additionally introduced. The operation of the former is explained in the timing diagrams provided in the specification. 2 Il. with (L

Description

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The invention relates to a pulse technique and can be used in testing equipment.

The purpose of the invention is to increase the density of the following bell-shaped impulses while simultaneously expanding the functional possibilities by obtaining different-polar bell-shaped impulses with predetermined different intervals between them.

Figure 1 shows the block diagram of the device; in Fig. 2, a time clock 5 and through an inverting repeater 6 (Fig. 26), to the second information input of the analog switch 5. The signal from the generator I output also goes to the first (inverting) input of the comparator 2 and the first (non-inverting) input comparator 3. Source 7 generates equal in absolute value constant voltage levels of positive and negative polarity (dotted line in FIG. 2a), which are respectively fed to the second (non-inverting)

The diagrams explaining the operation of the device — the IP input of the comparator 2 and the second (inversion.

The shaper contains a sinusoidal signal generator, the first and second comparators 2 and 3, the attenuator 4, the analog switch 5, the inverting repeater 6, the source 7 of different polarity voltage, the IZ element, the counter 9 pulses, the 10 low-pass filter and the output bus 11. Analog switch 5 can be performed, for example, on a K564KP25 microcircuit, which consists of eight analog switches, which are assigned by a logical decoder. The outputs of all analog switches are combined and form the output of an analog switch 5, the inputs of a part of the volume switches The inputs and outputs of the other part of the keys are combined and form the second information input of the analog switch 5, the inputs of the other switches are connected to the common bus, and the inputs of the logical decoder are the control and gate inputs of the analog switch 5 The splitting of keys into groups is carried out depending on the designation of the appearance of bell-shaped impulses.

In this example implementation, the first information input of the analog switch 5 is formed by the inputs of the first and fourth keys, and the second information input by the inputs of the second and sixth keys.

The shaper works as follows.

The generator 1 generates a sinusoidal signal of high stability (Fig. 2a) 5 which, via an attenuator 4 allowing the amplitude of the signal to be adjusted, is fed to the first information input of the analog switch

ten

5 and through the inverting repeater 6 (Fig.26) - to the second information input of the analog switch 5. The output from the generator I also goes to the first (inverting) input of the comparator 2 and the first (non-inverting) input of the comparator 3. Source 7 generates equal in absolute value constant voltage levels of positive and negative polarity (dotted line in FIG. 2a), which are respectively fed to the second (non-inverting)

compiler input. Comparator 3. The pulse sequences formed by comparators 2 and 3 (FIG. 2 c, d) are fed to the inputs of an AND 8 element that generates a pulse sequence (FIG. 2d) 5 with each pulse of the sequence due to the same absolute voltage on the second inputs of comparators 2

5 and 3 is located on the time axis symmetrically with respect to the moment of transition of the sinusoidal signal (FIG. 2a) through the zero level. From the output of the element AND 8, the sequence of pulses goes to the counter input of the counter 9 and to the gate of the analog switch 5, and to the control input inputs of the analog switch 5 receives the code from the outputs of counter 9,

 Thus, during one period of the highest bit of counter 9 (in this case, 8 clock cycles), the signals from the information inputs of analog switch 5 pass through the output of analog switch 5 (in this case, the signals will pass through 1, 2, 4 and b-th cycles). As a result, the output of the analog switch 5 forms a code

45 a sequence of truncated sinusoidal pulses (Fig. 2e), with the truncation of the pulses due to the disconnection of the output of the anap switch 5 from its information

50 inputs for the duration of the pulses (Fig 2d), gating arriving at its input from the output of the AND 8 element. When passing a sequence of truncated sinusoidal pulses

gg through the low-pass filter 10, the high-frequency components of the spectrum are cut off and the truncated sinusoidal pulses take a shape close to bell-shaped (FIG. 2g), with

truncating the fronts of sinusoidal pulses allows to obtain a sequence of bell-shaped pulses with a high follow-up density, for example, the 1st and 2nd pulses in Fig. 2.zh. In addition, the functionality expands, since the formation of different-polar bell-shaped pulses following in the order of the programmed intervals.

Claims (1)

Invention Formula A shaper of a bell-shaped pulse generator comprising a sinusoidal signal generator, the output of which is connected to the first input of the first comparator, a pulse counter, an element And an analog switch, characterized in that, in order to increase the density of the following bell-shaped pulses while simultaneously expanding the functionality U ..- ..  -: / - Ls / -: -: / -; / - :: L /. ./L /. ./X. , / L / ./L  y u v / xy vy y a second comparator is introduced, and a voltage source of alternating voltage, an attenuator, an inverting repeater and a low-pass filter, the first input of the second comparator connected to the first input of the first comparator, the second inputs of the first and second comparators are connected to the corresponding outputs of the source of different voltage, and the outputs are connected respectively to the first and second inputs of the element I, the output of which is connected to the input of the pulse counter and the gate input of the analog switch, the input of the attenuator is connected to the output the sine wave generator's house, and the output to the first information input of the analog switch and via the inverting repeater to the second information input of the analog switch, the control inputs of which are serially connected to the outputs of the pulse counter, and the output through a low-pass filter connected to the output bus. - /