SU964982A1 - Switching apparatus control device - Google Patents

Description

The invention relates to automation and computing and can be used in the management of analog signal switches.

Known control devices for switches include serially connected clock generator, a counter made on triggers, and a decoder, the outputs of which are connected to the control inputs of switch 1.

However, these devices do not allow adjustment of the polling pulse durations and the pauses between them.

It is also known a switch control device containing a series-connected clock generator, a counter executed on triggers, and a decoder, to the other inputs of which the output of the multivibrator is connected via an inverter whose input is connected via a differentiating circuit and the second inverter to the generator output41 clock 2,

The disadvantage of this device is that the ratio of the durations of the polling pulses and the pauses between them is the same for all

switch channels and can be changed only during reconfiguration, the multivibrator tuning parameter. This does not allow the polling pulse duration to be changed on any of the channels depending on the size of the switched signal, which prevents the device from being used, for example, to simultaneously encode the switched signals.

The purpose of the invention is to expand the functionality of the device.

15

The goal is achieved in that a switch control device comprising a clock pulse generator, the output of which is connected to a counter connected in series,

A voltage transducer into a pulse width and an OR element are introduced to the decoder, the switch and to the inverter, the differentiating circuit and the multivibrator;

25 is connected with the output of the multivibrator, the second input is through the voltage-to-voltage converter with the output of the switch, and the output of the OR element is connected to other inputs

30 decoder.

Figure 1 shows a block diagram of a switch control device; figure 2 - timing charts of its nodes.

The switch control device consists of a clock pulse generator 1, the output of which is connected to the input of a counter 2, made on triggers, connected to the corresponding inputs of the decoder 3, and the control inputs of the switch 4 are connected to the outputs. In addition, the clock 1 generator output. connected inverter 5, differentiating the circuit 6 and the standby multivibrator 7 is connected to the first input of the element OR 8, to the second input of which through the voltage-to-pulse converter 9 vyhod.10 switch connected to the other inputs of which are connected and switched bus signal and an output of OR 8 is connected to additional inputs of decoder 3

The switch control device operates as follows.

A clock pulse generator 1 generates rectangular clock pulses with a predetermined period T. By a negative differential, the clock pulses trigger the counter 2, FIG. 1,2,3,22,2,24,25 - timing charts of the generator 1 clock pulses and triggers of the counter 2. So the commanding pulses, passed through the inverter 5 and, changing the phase to the opposite, go to the differentiating circuit 6. Positive output from the output differentiating circuit b starts standby multivibrator 7, the pulses from the output of which, passed the element OR 8, go to the additional inputs of the decoder 3. Figure 2 5,6,7 - timing diagrams of inverter 5, differentiating circuit b and standby multivibrator 7. From the output decoder 3 to the control input The switching key 4 of the switch 4 receives a polling pulse equal to the duration of the pulse generated by the waiting multivibrator 7, which unlocks this key, resulting in the output 10 of the switch 4 producing a voltage equal to the voltage of the key. This voltage triggers the voltage converter 9 to the pulse duration, the output of which removes the pulse. / Proportional in duration to the voltage value at the output of switch 4. In the OR 8 element, the pulse durations coming from the outputs of the standby multivibrator 7 and voltage converter 9 are added. pulse duration, total pulse duration from the output of the element OR 8 goes to the additional inputs of the decoder and lengthens the duration of the polling pulse of the corresponding key colm Tator 4 by an amount proportional to the voltage at the output of the switch 4. In Fig.2, 8, 9,4 are timing diagrams at the outputs of the voltage converter 9 in the pulse duration, the element OR 8 and the switch 4 analog signals,

The maximum pulse duration at the output of the voltage converter 9 to the pulse duration is determined by the largest value of the switched voltage and is equal to the duration of the generator period of 1 clock pulses. The pulse duration at the output of the standby multivibrator 7 is selected depending on the deadband of the voltage converter 9 in the pulse width, i.e. the switching time of the small voltages entering the dead zone of the voltage converter 9 in the pulse duration is equal to the pulse duration, played by the multivibrator 7.

Claims (2)

The switch control device allows adjusting the polling pulse durations and pauses between them within the oscillation period of the clock generator, depending on the voltage switched across each switch channel, which expands its scope in devices of pulse engineering and automation. Invention Formula A switch i control device containing a clock pulse generator, the output of which is connected to a serially connected meter, a decoder, a switch and an inverter, a differentiating circuit and a multivibrator, characterized in that, in order to enhance the functionality of the device, a voltage converter is introduced into the duration pulse and the OR element, the first input of which is connected to the output of the multivibrator, the second input through the voltage to voltage converter to the output of the switch, while you od OR gate is connected to the other decoder inputs. Sources of information taken into account in the examination 1, Shushkov E.I. and Tsodikov MB Multichannel analog-to-digital converters. L., Energie, 1975, p. 91-95, fig. 4-5. 2. USSR author's certificate I 507935, class H 03 K 17/02, 11/21/74 (prototype). h il 2i 3 2j 2b , .fi e, 7t ff, 9, one 2