SU491902A1 - Device for tolerance control of pulse amplitude - Google Patents

Description

one

The invention relates to the field of ralT, io electronics.

Devices are known for the tolerance control of the amplitude of pulses, the comparison element containing, the first input of which is connected to the source of the reference constant voltage, and the output of the load resistor connected to the oscilloscope.

This device has a low test performance.

In order to increase performance, a switch is introduced into the proposed device, the synchronizer and generator connected in series are connected to the first input, the IKO to the second input is the source — top, its horizontal and voltage, the synchronizer input is connected to the fourth input, and the switch output is connected to the second input of the comparison element .

FIG. 1 shows a block diagram of the described device; in fig. 2 - time diagram of his work.

The device contains the comparison element 1, the load resistor 2, the source 3 of the reference voltage, and the oscilloscope 4, the source 5 of the signal under study, the synchronizer 6, the three-stroke generator 7, the switch 8 and the sources 9 and 10 of the calibrated voltage, respectively The range of permissible values of monitored pulse amplitudes is found, the input signal and the sources of calibrated voltage are connected to the inputs of the high-speed switch, the output of the switch is connected to the input of the element comparison, and the switch is controlled by a three-stroke generator, triggered by trigger pulses from a synchronizer synchronized by the signal under study.

FIG. 2 shows the time relationships between the input signal, the pulses.

triggering from a synchronous generator, control signals A, B, C from a three-stroke generator 7, connecting via switch 8 to the element of comparison 1 alternately investigated signal and SOURCES 9 and 10 of calibrated voltage, and pulses arriving at the oscilloscope input. The repetition frequency of the start-up pulse (multiplicity of frequency division) is calculated based on the fast operation of the switch 8. Switch 8 for

The increase in accuracy of measurements is performed on magnetically controlled contacts and with a frequency of about 100 Hz. FIG. 2 conventionally received repetition rate of start pulses 2 times less than the repetition frequency of the input

signal.

During the first cycle of the generator 7, an oscilloscope 4 impulses an impulse with

amplitude, n Rf (Um, oi),

where R is the resistance of the resistor 2;

im - the amplitude value of the current through the resistor corresponding to the amplitude value of the input signal U, „,,

f (Um, Loii) –d is the dynamic volt-ampere characteristic of the comparison elements with the reference voltage of the source 3 Woy and the load R;

f (U, n, Won) is the value of Lo ,,) when the signal voltage.

In | VTO: a generator operating cycle 8, a pulse with an amplitude of f / B.j- / (UB.A.r. Fjon) is applied to the input of the oscilloscope,

where f / v-dg - the upper limit of the amplitude of the input signal, / (/ idg, and „n) - the value of f (Ui Uon) at (.dg).

In the third cycle, a pulse with amplitude tvii.r (f / H., Tg, f / on) arrives at the oscilloscope input,

where uu.h.v. - the lower limit of the amplitude of the input signal, ((n.1.t., an) is the value of / (t /, t / on) at 17 bdd.

Thus, on the oscilloscope screen, we obtain an image of the imiuls, functionally associated with the input signal, and two horizontal lines, functionally associated with the upper and lower limits of the amplitudes of the input signal. Since f (Ui Uon) usually has a monotonic character, the case when the amplitude of the pulses is located between the horizontal lines mentioned above corresponds to the equivalent controlled product; cases where the amplitude is higher than the upper line or lower than the lower line is a non-ionic product. The device does not need to measure the amplitude of the pulses and compare the obtained numerical results with acceptable values. At the same time, the device does not need frequent adjustments and calibrations, since with drift f (UiUoti), the values in-g simultaneously change accordingly. and Uu.r-, and. in all cases, the indications for which the products are rejected remain unchanged. Thus, in addition to the convenience of monitoring, labor productivity is increased and measurement accuracy is maintained high.

Claims (1)

Invention Formula A device for controlling the pulse amplitude, containing a comparison element, to the first input of which is connected a reference reference voltage source, and to the output - a load resistor connected to an oscilloscope, characterized in order to increase the device performance, a switch is inserted into it, to the first input of which are connected in series with the synchronizer and generator, to the second input - the source of the upper boundary voltage, to the third input - the source of the lower boundary voltage, to the fourth input is the input of the synchronizer, and the output of the commutator is connected to the second input of the comparison element. 0123456789 70 P atsitschlshtshsh i