SU548937A1 - Starting stop device - Google Patents

Description

I

The invention relates to telegraphy and data transmission and can be used in an apparatus in which the start-stop principle of synchronization is used.

Known transmitting start-stop device containing the master oscillator and connected to the input information bus distributor, the output of which is connected to the output unit 1.

However, in the known device, the distributor Nrekran1, begins its work after the transmission of each telegraphic sign and again starts up the signal about the transfer of a new sign. In the case of the transfer of an array of information on: the current from an electronic computer (computer) and consisting of a large number of consecutive information bits, the operation of the device is characterized by reduced speed.

The aim of the invention is to increase the transmission speed when operating in a computer.

To do this, a control unit and a clock unit are introduced into the proposed transmitting start-stop device, the clock input of the control unit is connected to the output of the clock unit, the outputs of the control unit are connected to the corresponding inputs of the clock unit and the distributor input, the installation input of the clock unit is connected to the auxiliary input of the distributor and with the information request bus, and the remaining outputs of the clock unit are connected to the clock inputs of the distributor, and the distributor is made on D-flip-flops, n and this output of each D-flip-flop, except the last, coupled to the input of a subsequent, input of the first D-trnggera connected via a delay element to the bus initial setup, outputs of the D flip-flops, except for the first

and the last, are connected to the first inputs of the corresponding elements AND, the second inputs of which are information inputs of the distributor, the third inputs of the elements AND, are connected with the input of the corresponding

D-flip-flops, and the outputs of the AND elements are connected to the inputs of the OR element, to the auxiliary input of which the output of the last D-flip-flop is connected, and the inputs of the D-flip-flops are clock inputs of the allocator.

The drawing shows a structural electrical circuit and the proposed transmitting start-stop device. The device contains a master oscillator

1 and a distributor 7 connected to the input information buses 2-6, the output of which is connected to the output unit 8, the control unit 9 and the clock unit 10, the clock input 11 of the control unit 9 connected to the output of the clock unit 10, the outputs 12, 13, 14 of the unit control 9 is connected to the corresponding inputs of the clock unit 10 and the input of the distributor 7, the installation input of the clock unit 10 is connected to the additional output of the distributor 7 and the information request 15, and the remaining outputs 16-19 of the clock unit 10 are connected to the clock odes rasnredelitel 7. The distributor 7 is formed on the D-flip-flops

20, each of which contains elements And

21,22, OR 23, Iri this output of each D-flip-flop 20, except the last, is connected to the next input, the input of the first D-thrnger 20 is connected through a delay element (EZ) 24 to the 25 initial setting, the outputs of the D-flip-flops 20, besides the first and last, are connected to the first inputs of the corresponding elements AND 26-30, the second inputs of which are information inputs (sections 2-6) of the distributor 7, the third inputs of the AND elements 26-30 are connected to the inputs of the corresponding D-flip-flops 20, and the outputs - with the inputs of the element OR 31, to the auxiliary input of which you are connected the stroke of the last D-flip-flop 20, and the inputs of the D-flip-flops 20 are clock inputs of the allocator 7. In addition, the distributor 7 contains EZ 32, 33, elements And 34, NOT 35.

The clock unit 10 contains the elements HE 36, 37, 38, AND 39-42, OR 43, the trigger 44 with the counting input, the clock pulse generator 45, the outputs of which are the outputs 16-19 of the clock unit 10.

The control unit 9 contains the elements OR 46-49, AND 50, 51, 52, HE 53, 54, a symmetric trigger 55, EZ 56, 57, 58, and the input information buses 2-6 and the width 59, which supplies the potential from the drive at the output of the computer or hand-held dialer, connected to the corresponding inputs of the element OR 46. The bus 25 is connected to the corresponding inputs of the accumulator 9 and the clock unit 10.

The device works as follows.

When the power is turned on, the bus 25 receives a short-term pulse, which serves to set the initial clock signals at outputs 16-19 of the shaper. With the appearance of a pulse on the bus 25 at the output of the trigger 55 connected to the OR 49 element, a potential appears which through the OR 49 element enters the shaper 45 and brings it to the initial state. From the same trigger output 55, the potential flows through the OR element 31 to the output unit 8, and a current package is sent to the communication channel until the information has been output to the communication channel. The impulse of the initial installation from the bus 25 through the element NOT 38 enters the shaper 45, and the signals from the outputs 16-19 will be fed to the distributor 7 only after the expiration of the impulse of the initial installation.

The first D-flip-flop 20 memorizes a “unit from impulse from band 25. The recording delay time of EZ 24 is chosen equal to the impulse duration of 25. 25. From the master oscillator 1, a signal of the form“ square wave to two elements And 39, 40, and to element And 39 in inverted view. Elements 39 and 40 are alternately opened in such a way that during one cycle of non-transmission of a telegraphic sign one of these schemes is opened, and the second after the next. Then everything repeats. 10 Thus, at the output of the element OR 43, it is either the usual "meander or inverted." The elements 39 and 40 control the counting trigger 44, to the counting input of which short impulses are fed from the bus 15 15, corresponding to the end of the stop telegraph sign and formed from the signal at the output of the last D-flip-flop 20 of the distributor 7 with the help of HE 35, AND 34 and EZ 33, the delay time of the latter is determined by the duration of the short imiuls at the output of the element 34 and is chosen on the condition that this time should be no less than the response time of the driver 45. Short pulses from the bus 15, the direct 5 d element HE 37, close uh The element 41 at the time of the end of the non-transmission of the stop parcel for the meander passing through this element. Thus, at the output of the element AND 41, a signal is generated that is required for the operation of the imaging unit 45. The circuits of the elements AND 50, HE 53 and EZ 57 generate short emulsions with a duration equal to the delay time of EZ 57 synchronous with the signal at the clock input 11 of the control unit 9. the front of the pulses at the clock input 11. These short pulses are sent to the elements And 51, 52. In the case, the signal does not go to the bus 2-6, the element And 51 is open for short pulses coming from the output of the element 50, and the element 52 is closed to them. The element OR 48, these pulses put the trigger 55 into a state in which a potential appears at its output, connected to the input of the element OR 49, through the element OR 49 to the driver 45. This potential sets the initial signals at the outputs the latter, which are stored until the point in time corresponding to the arrival on bus 2-6 of signal 0 as a parallel five-element code. This code is applied to the input slots 2-6 until a signal to change the code combination (information request signal 5) from the bus 15 is sent to the drive from which the input information is supplied. At the time of entering the input buses 2-6 The code at the output of the element OR 46 of the control unit 9 appears potential indicating the arrival of information to the device. This 0 potential closes the element And 52 for the signal from the output of the element And 50 and closes the element And 51 for the same signal. As a result, the trigger 55 is transferred to the state where the output appears at output 12, the opening element AND 42 for the signal from the output of element AND 41 in the clock unit 10 passing to the driver 45. The latter begins to generate sequences of clock pulses. With these signals, the unit recorded in the first D-flip-flop 20 of the distributor 7 starts moving from this D-flip-flop a 20 to the second and so on, but the knock does not reach the last D-flip-flop 20. The transmitted code from input buses 2-6, as well as signals from the outputs of D-flip-flops 20. In addition, the signals from output 19 and the elements from 26, 28, 30 are supplied from output 19, and to elements from 27, 29 - the signal from output 17 of the clock unit 10. As a result, at the outputs of the And 26-30 elements, zero or single ones appear (depending on the five The terminal code of a to-start package. A starting telegraph sign has a duration of to, and a stoneware package is formed of a pulse of 1.5 to at the output of the last D-flip-flop 20. Signals from the outputs of elements I 26-30 are fed to the inputs of the ILR element 31, sec the output of which the formed telegraph mark falls on the output unit 8. Bus 15 receives a signal corresponding in time to the end of the stop package. This signal on tires 2-6 establishes a new code combination.

Thereafter, the sign transmission cycle is repeated. If there is no information on the buses 2-6 after the request, the start-stop transmitter is placed in the standby mode for inputting information to its input. In this case, a current package is fed into the channel.

The delay elements 33, 58, 57, 32, 56, respectively, have a signal delay time:

T2, Tz, T4, TS.

The delay time T2 is chosen in such a way that the signals at inputs 12 and 13 overlap in time so that there is no time gap between these signals applied to shaper 45 in turn due to a delay in the response time of the logic circuits.

The delay time T2 is selected from the condition of the element (AND, OR, NOT).

The delay time Tc is selected from the condition of reliable operation of logic circuits. Element triggers are selected.

The TS delay time is necessary in order to eliminate, for various reasons, associated with the presence of logic response times in a multi-stage accumulator, interruptions between the supply of code combinations on 2-b buses. In addition, the condition must be met to reliably set the clock generator to its original state in the pauses and to supply the current burst.

The delay time T4 is selected from the condition and is several microseconds. The delay at time T4 is necessary, since it is necessary to record a single signal in the first D-flip-flop on the elements And n, therefore the recording of "one" is done simultaneously with the clock signals at the outputs 16, 17 being applied to this flip-flop.

Claims (2)

1. A transmitting start-stop device containing a master oscillator and a distributor connected to the input information buses, the output of which is connected to the output unit, characterized in that, in order to increase the transmission speed when working with an electronic computer, a control unit and a clock unit are inserted, the clock input of the control unit is connected to the output of the clock unit, the outputs of the control unit are connected to the corresponding inputs of the clock unit and the input of the distributor, the setup input of the clock the guide block is connected to an additional input of the distributor, and the bus zanrosa information, while the remaining outputs timing unit are connected to clock inputs of the distributor. 2. The device on and. 1, characterized in that the response is made on D-flip-flops, the output of each D-flip-flop, except the last, is connected to the next input, the input of the first D-flip-flop is connected via the delay element to the initial installation bus, the outputs of the D-flip-flops, except the first and last, are connected to the first inputs of the corresponding AND elements, the second inputs of which are information inputs of the distributor, the third inputs of the AND elements are connected to the inputs of the corresponding D-flip-flops, and the outputs of the AND elements are connected to the inputs of the OR element, to tional LOG} which is connected the output of the last D flip-flop, the D inputs of flip-flops are the clock inputs of the distributor. Sources of information taken into account during exertize: 1. Terentyev, B.P., Principles of Construction of Electron-Mechanical Telegraph Apparatus. M., “Holy, 1973, p. 31-34 (prototype).