SU417749A1 - - Google Patents

Description

one

The invention relates to electronic engineering and can be used to control and classify semi-aerial devices.

BACKGROUND OF THE INVENTION There are known devices for monitoring p-n-relays, which contain a level reference generator, a mode voltage generator, a null organ, a result recorder, a clock pulse generator, and a switch.

The aim of the invention is to increase productivity.

For this, the proposed device additionally contains a sequentially connected delay circuit, the input of which is connected to the output of a clock generator, a strobe pulse generator, an AND circuit, the second input of which is connected to the zero-body output, and the output to the recorder input.

FIG. 1 is a block diagram of the described device; in fig. Figure 2 shows the stress plots at characteristic points of the circuit.

The device contains a clock pulse generator 1, a switch 2, a mode voltage generator 3, a zero-body 4, a reference level generator 5, a delay circuit 6, a strobe pulse generator 7, an AND 8 circuit, a registrar 9, a pn junction being tested ten.

The impulse with the duration of Go (Fig. 2, a) comes from the clock pulse generator 1 and turns on the corresponding relay of the switch 2, through the contacts of which the voltage from

generator 3 is fed through the test p- ' -transition (Fig. 2.6) to the input of the zero-body 4. The current flowing through the transition (Fig. 2, c) creates a voltage drop at the input resistance of the first zero-organ input 4. Simultaneously through the other contacts of the same relay, the second input of the zero-organ 4 applies a reference voltage from the generator 5. The leading edge of the pulse of the generator 1 is delayed by circuit 6 (Fig. 2, d) and starts the generator of the strobe signal 7. From the output of the zero-organ 4 and the output of the generator 7 (Fig. 2, e) signals. served on the circuit "And 8. In the presence of signals on both input The “8” circuit of the signal from its output is fed to the input of the result recorder 9. The presence or absence of a signal at the output of the null organ 4 depends on the ratio of the magnitudes of the signals at its inputs.

There is no loss of accuracy in the device if, and it is possible to reduce Guo to the duration To, Ti, if O, and G2-G4,

where TI is the duration of the transition process, Ha is the time interval equal to Go-G Gz - the duration of the delay created

scheme 6,

Gd is the pulse duration of the generator 7, is the time required to make one measurement in the proposed device.

The increase in productivity N is determined by the expression L Go / Go, 10, since is the time required for the production (execution) of a single measurement in a known device.

Subject invention

A device for the classification of p - "- transitions by the magnitude of the reverse current, containing a reference level generator, a generator

operating voltage, null-organ, result recorder, clock pulse generator and switch, characterized in that, in order to improve performance, the device further comprises a series-connected delay circuit, the input of which is connected to the output of the clock generator, strobe pulse generator , the circuit “And, the second input of which is connected to the output of the zero-organ, and the output - to the input of the recorder.

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