SU843295A1 - Connecting device - Google Patents

Description

(54). DEVICE FOR CONNECTION

The invention relates to a communication technique and can be mixed with the interface of instrumentation for measuring the statistical parameters of tetratrafic with switching station instruments, as well as in measuring systems built on the principle of group counting the number of events.

A device is known to connect, for example, a teletraffic statistical meter to a switching station that contains N differentiation units with a resistor, the output of each differentiation unit is connected via an appropriate N from the output diode to the input of the integrator, the output of which is connected to the input of the statistical parameter meter, and the input of each differentiation unit is connected to the corresponding output of the switching station fl.

However, the noise immunity of such a device is low.

The chain of invention is to increase resistance to resistance.

Claims (2)

The goal is achieved by the fact that in the device for connecting, for example, a teletraffic statistical parameter meter to a switching station containing N differentiation units with a resistor, the output of each differential unit is connected via the appropriate 14 of the connecting diode to the input of the integration unit whose output through the temporal shaping unit the delay is connected to the input of the statistical parameter meter, and the input of each differentiation unit is connected to the corresponding switching output station, N additional resistors and H thyristors are introduced, with the thyristor control input of each differentiation unit connected to the meter input through an appropriate additional resistor, and in each differentiation unit the cathode of the thyristor is connected to one of the resistor leads and output a differentiation unit whose input is another output of the resistor, and the thyristor anode is connected to the common busbar. The drawing shows the electrical circuit of the proposed device. The device for connection contains H differentiation units 1 with a resistor 2, N output diode 3 diodes, an integration unit 4, a time delay fpr 5, N additional resistors 6 and N thyristors 7, an output bus 8. The device operates in a coherent manner. If no ground potential (plus) is input to the device inputs, then thyristors 7 are turned off. When the ground arrives at the input, the capacitor of the integration unit 4 is charged before the voltage of the unit 5 for the formation of the delay. The output pulse of the delay shaping unit 5 is fed to the input of the meter and through additional resistors 6 to the additional input of the differentiation units 1. The thyristor 7, connected by a resistor 2 to the input of the device through which zeal is currently flowing, turns on and closes the input signal to the common bus 8 through a resistor 2. Thereby, the input of the input signal to the input of the integration unit 4 is stopped. At the same time, the duration of the input signal is almost equal to the charge time of the capacitor of the integration block 4, which is necessary from the point of view of protection of the meter from contact bounce (the turn-on time of the thyristor can be disregarded due to its smallness). The capacitor of the integration unit 4 is discharged through the delay shaping unit 5 during the output pulse. At the end of the output pulse, the delay shaping unit 5 and the integration unit 4 are reset And the device is ready to receive the next input pulse in another input. When the earth is removed from the input of the device, the switched on thyristor is de-energized and automatically switched off. In the proposed device, the input signals are shortened to the optimum value, which improves the accuracy of measuring the statistical parameters of teletraffic and its noise immunity. The invention includes a device for connecting, for example, a telescopic statistical parameter meter to a switching station, containing N differentiation units with a resistor, the output of each differentiation unit is connected via an appropriate N dissociating diode to the input of the integration unit, the output of which is connected through the time delay shaping unit to the input of the statistical parameters meter, and the input of each differentiation unit is connected to the corresponding output of the switching station, I distinguish Moreover, in order to measure the noise immunity, N additional resistors and M thyristors were introduced, and the thyristor control input of each differentiation unit is connected to the meter input through an appropriate additional resistor, and in each differentiation unit the cathode of the thyristor is connected to one of the resistor leads and is the output of the differentiation unit, the input of which is the other output of the resistor, and the anode of the thyristor is connected to a common length. Sources of information taken into account during the examination 1. USSR Author's Certificate, No. 354603j Cl. H 04 M 3/22, 1970.