RU1805476C - Multichannel device for user interface to common bus - Google Patents

Abstract

The invention relates to computer technology and communications and can be used in distribution computing systems to connect both active and passive subscribers to a common trunk. In order to expand the scope of application, the device contains a common element And for all channels and in each channel two single vibrators, two triggers, two And elements, a driver and pulses, an amplifier, a node for connecting to the trunk, an encoder, two delay elements, three registers, a comparison circuit pulse generator. 2 ill.

Description

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The invention relates to computer technology and communications and can be used in distribution computing systems to connect both active and passive subscribers to a common trunk.

The aim of the invention is to expand the scope by realizing the possibility of working with both active and passive subscribers and eliminating the participation of subscribers in the process of capturing the trunk and transmitting information.

Figure 1 presents the functional diagram of the device; figure 2 - structural diagram of the first delay element.

The device contains a common element I 1 for all channels and in each channel 2 a pulse shaper 3, a single vibrator 7, elements 12, 18, triggers 8, 14, registers 4, 10, 11, a generator 6, a delay element 5, a delay line 13. comparison circuit 9,

amplifier 15, encoder 16, connection node 19, the second input common to all channels 2 of the element And 1 connected to a common input 22 of the initial installation, the output of the element And 1 connected to the input 21 of the polling of the first channel 2, the output 25 of the polling of each channel is connected to the input 21 of the polling next, the polling output 25 of the last channel 2 is connected to the first input of AND element 1, in each channel the polling input 21 is connected to the input of the pulse shaper 3, the output of which is connected to the triggering input of the first 7 one-shot. whose inverse output is connected to the first input of the first element And 12, the direct output of the first 7 one-shot is connected to the clock input of the first 8 trigger, the inverse output of which is connected to the second input of the element And 12, and the direct output to the input of the delay line 13, the first output which is connected to the input

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of the encoder 16, and the second output is with the start input of the encoder 16, the output of the element And 12 is connected to the input of the amplifier 15, the output of which is connected to the output 25 of the channel scan, the information output of the encoder 16 is connected to the input of the connection node (19), the output of which is connected to common 20 trunk, output end of encoder transmission

16 is connected to the trigger, the input of the second

17 single-vibrator, the output of which is connected to the first input of the second element And 18, the second input of which, together with the inputs of the initial installation of the encoder 16, registers 4, 10, 11 is connected to the input 22 of the initial installation, the output of the second element And 18 is connected to the input of the initial installation of the second 14 a trigger, the output of which, together with the information input and the initial setup input of the first 8 triggers, is connected to the channel ready output 24, the clock input of the second trigger 14 is connected to the output of the comparison circuit 9, the information inputs of which are connected the corresponding outputs of the registers 4 and 10, the information inputs of which together with the information inputs of the encoder 16 are connected to the information outputs of the register 11, the control and information inputs of which are channel inputs, the output of the generator 6 is connected to the input of the delay element 5 and to the gate input of the second 10 register , the output of the delay element 5 is connected to the gate input of the first 4 registers.

The device operates as follows.

At the first time after the power is turned on, an initial setting signal is generated in the system, which from input 22 is fed to the first input of the element And 1 common to all channels and in each channel to the second input of element And 18, as well as to the inputs of the initial installation of encoder 16 and registers 4, 10 and 1.1, setting them to their original position. From the output of AND element 18, the initial setting signal sets the trigger 14 to the zero state. The low level signal from the output of the trigger 14 keeps the trigger 8 in the zero state.

At the time of recording the initial setup signal, a positive differential is generated at the output of the element And 1, which is supplied through the pulse shaper 3 to the triggering input of the single-vibrator 7. From the inverse output of the single-vibrator 7, a negative pulse is transmitted through the And 12 and the amplifier 15 goes to the polling input 21 of the next channel 2 . From the output 25 of the survey of the last channel, a negative pulse through the element And 1 again enters

21 polls of the first 2 channels. Thus, the system performs a cyclic interrogation of channels 2. From the direct output of a single-shot 7, a positive pulse arrives

to the clock input of flip-flop 8, however, flip-flop 8 is held in its initial state by the potential of a low level from the output of flip-flop 14.

The low-level signal from the output of the trigger 14 goes to the output 24 of the channel readiness, allowing the subscriber to write information to the register 11.

When writing information to register 11, information from its outputs goes to the information inputs of registers 4 and 10 and encoder 16. Upon the first pulse at the output of generator 6, information will be written to register 10 and from its outputs will go to the first group of inputs of the circuit 9 comparisons.

0 The second group of inputs of the comparison circuit 9 receives information from the outputs of the register 4. Information is recorded in the register 4 with a delay determined by the delay element 5. After recording

5, the information in the register 4 on both groups of inputs of the comparison circuit 9 is the equality of codes.

The difference in codes at the inputs of the comparison circuit 9 occurs during the time determined by the delay element 5. Thus, a negative pulse is generated at the output of the comparison circuit, the duration of which is equal to the delay time for the pulse to pass through the delay element 5. By the positive edge of this pulse, the trigger 14 is switched to a single state. A high-level signal from its output will prohibit the subscriber from writing information to register 11 and unlocks trigger 0 ger 8. With the first pulse from the output of a single-shot 7, trigger 8 will switch to the single state and a low-level signal from its inverse output will prohibit further distribution of the interrogation

5 pulses, and a positive difference on its direct output initiates the operation of the delay line 13. At the outputs of the delay line 13, two negative pulses will be successively generated. By

0 the first pulse in the encoder 16 will be written information from the outputs of the register 11. According to the second pulse, the encoder 16 will begin to transmit the received information encoded accordingly, through

5 transmitter 19 to a total of 20 trunk. At the end of the transmission of the information frame, the encoder 16 will generate a signal to end the transmission, which will be transmitted to the triggering input of the second one-shot 17. From the output of the one-shot 17, a negative pulse through the And 18 element sets the trigger 14 to its original state. The low-level signal from the output of the trigger 14 sets the trigger 8 to its original position and allows the subscriber to record the next piece of information in the register 11 and the operation cycle of the device is repeated.

One of the possible options for building the device:

I elements, pulse shapers, amplifiers - 133 LAZ; 133 LAZ; registers 133 IR13; 133TM2 triggers; single vibrators 133 PP (133TM2); delay elements 133 PP (1EZTM2); generator 133 LAZ; encoder 588AG6 (588VGZ); 588BA2 transmitters (Resetal); comparison scheme 533 SP1.

Claims (1)

SUMMARY OF THE INVENTION A multi-channel device for interfacing subscribers to a common trunk, comprising a trunk connecting node, an encoder, two registers, two AND elements, an amplifier in each channel, the output of the connecting node to the trunk being connected to a common trunk, and its input to the data output encoder, characterized in that, in order to expand the scope of application, a pulse shaper, two one-shots, a pulse generator, three registers, a comparison circuit, two delay elements and a common element for all channels are introduced into each channel And, and the output of the latter is connected to the input of the polling channel, which in each channel is connected to the input of the pulse shaper, the output of which is connected to the input of the first single-vibrator, the inverse output of which is connected to the first input of the first element And channel, the output of which is connected to the input of the amplifier, the output of which is connected to the polling output of the channel, which is connected to the polling input of the next channel, the output polling of the last channel is connected to the first input of the And element common to all channels, the second input of which is connected to the channel inputs. The initial installation, in the form of the initial installation input of the device, the direct output of the first one-shot is connected to the clock input of the first trigger, the inverse output of which is connected to the second input of the first element And, the direct output of the first trigger is connected to the input of the first delay element; the outputs of which are connected to the control inputs of the encoder, the output of the end of the encoder transmission is connected to the triggering input of the second one-shot, the output of which is connected to the first input of the second element And, the second input of which, the reset inputs of the first, second and third registers and the encoder are connected to the input of the initial installation of the channel , the output of the second element And is connected to the installation input of the second trigger, the direct output of which is connected to the installation input and the information input of the first trigger, as well as the channel readiness output, information The input input of the second trigger is connected to the unit potential bus, the clock input of the second trigger is connected to the output of the comparison circuit, the information inputs of which are connected to the corresponding outputs of the first and second registers, the information inputs of which and the information inputs of the encoder are connected to the outputs of the third register, information and control the inputs of which are the same subscriber inputs of the channel, the output of the pulse generator is connected to the gate input of the second register and the input of the second a delay element, the output of which is connected to the gate input of the first register. 1 S3. . 22 .Fig. i. & 23 24-22