SU1506545A1 - Device for counting bipolar pulses - Google Patents

Abstract

The invention relates to the field of automation and computer technology and can be used in information exchange systems between computing devices using a serial code transmitted by bipolar pulses. The device contains diodes 5,6, element NOT 7, elements AND 8-13, triggers 15-17, elements OR 18, 19, input bus 1, bus 2.3 control, switch 4, trigger 14 and counter 20. Increased accuracy is provided by counting the number of bipolar pulses in the interval between the two control signals, regardless of which bipolar pulses coincide with the control signals. 2 Il.

Description

The invention relates to automation and computing and can be used in systems for the exchange of information between computing devices using a serial code transmitted by bipolar pulses.

The purpose of the invention is to increase accuracy.

The goal is achieved by introducing new design features that provide for counting the number of bipolar pulses in the time interval between the two control signals, regardless of whether the control signals coincide with positive or negative pulses.

Fig. 1 shows a diagram of a device for counting bipolar pulses. Fig. 2 shows timing diagrams of a bipolar pulse counting device.

The device contains input bus 1, first and second buses 2 and 3 of control, switch 4, first and second diodes 5 and 6, element NOT 7, the first element OR 18, the inputs of which are connected to the outputs of elements AND 10 and 11, the first inputs which are connected respectively, with the direct outputs of the flip-flops 16 and 15, the inputs of the installation in About which are connected to the additional input of the installation at the O of the trigger 17 and with the control bus 2,

10 the output of the switch 4 is connected to the anode of the diode 5 and to the cathode of the diode 6, the anode of which is connected to the input of the element HE 7, the output of which is connected to the second inputs of the elements 9, 10, 12,

15 the cathode of the diode 5 is connected to the second inputs of the elements And 8, 11, 13.

In the proposed device, the output code is removed from the output of the trigger 17, which is the youngest bit, and

20 from the outputs of counter bits 20,

The device for counting bipolar pulses works as follows.

Let input signal with 1

25 is a sequence of bipolar rectangular pulses (Fig. 2, Fig. 21), at the initial time point the triggers 14-17 and the counter 20 are in the zero state.

the sixth to sixth elements are AND 8-13, the first is 30 (output code 000 ... O, a circuit by setting element OR 18, whose inputs are connected to the outputs of elements AND 10 and 11, the first inputs of which are connected respectively to the direct outputs of the flip-flops 16 and 15, the inputs of the installation in About which are connected to the additional input of the installation in the O of the trigger 17 and with the control bus 2,

the output of the switch 4 is connected to the anode of the diode 5 and to the cathode of the diode 6, the anode of which is connected to the input of the element HE 7, the output of which is connected to the second inputs of the elements 9, 10, 12,

the cathode of the diode 5 is connected to the second inputs of the elements And 8, 11, 13.

In the proposed device, the output code is removed from the output of the trigger 17, which is the youngest bit, and

from the outputs of counter bits 20,

The device for counting bipolar pulses works as follows.

Let input signal with 1

is a sequence of bipolar rectangular pulses (Fig. 2, Fig. 21), at the initial time the triggers 14-17 and the counter 20 are in the zero state

fourth triggers 14-17, first and second elements OR 18 and 19, counter 20.

Figure 2 shows the timing diagrams of 21-27 signals, respectively, on the input busbar 1, on control buses 2 and 3, on the cathode of diode 5, on the output of the HE 7 element, and on the outputs of the SHSh 18 and 19 elements.

The installation input into O of the counter 20 is connected to the control bus 2 and to the installation input to 1 trigger 14, the installation input to O and the direct output of which are connected respectively to the control bus 3 and to the control input of the switch 4, whose information input is connected to the input bus 1} the outputs of the elements And 8 and 9 are connected respectively to the inputs of the installation in 1 of the flip-flops 15 and 16, the inverse outputs of which are connected respectively to the first inputs of the elements And 9 and 8 and to the first inputs of the elements And 13 and 12, the outputs of which are connected to the inputs of the element OR 19 exit to first connected to the counting input of the counter 20 and to the installation input in O of the trigger 17, the installation input in 1 of which is connected to the output of the initial zero state in FIG. 1 are not shown), at time t, a signal from the bus 2 is received, which sets 1 trigger 14 and confirms the zero state of the triggers 15-17 and the counter 20. If the trigger 14 is in the zero state,

the switch 4 is closed, if the trigger 14 is in the single state, then the KOMNryraTop 4 is open.

At time t, the switch 4 opens and, if a low signal is present at its output, then it passes a diode 6 through the circuit, a HE element 7 to the second inputs of AND 9, 10, 12. If the output signal of the switch 4 is high, then passes through the diode 5 to the second inputs of the elements AND 8, 11, 13. Let after the termination of the signal on bus 2 the output signal of the switch 4 is low. This through the open element AND 9 is set to 1 trigger 16 and then through the elements AND 10, OR 18 is set to 1 trigger 17.

If the signal on the bus 3 arrives. at the moment of burden tfl (the moment of termination of the negative part of the bipolar

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pulse on bus 1), then at this moment trigger 14 goes to state O and shuts switch 4. In the proposed state, the device is before the next pulse (signal) through bus 2. The output code of the considered case is 00 .., 01 (younger bit at the back). From time t to time tj one negative pulse passes, which is fixed by the value of the code code.

Let at time tj the next signal is received via bus 2, which coincides with the positive part of the bipolar pulse via bus 1. When the signal arrives through bus 2, the trigger 15-17 and the counter 20 go back to the initial state, and the trigger 14 goes to state 1 At the end of the pulse on bus 2, the positive part of the pulse from the output of switch 4 through diode 5 sets the trigger 15 to 1 and then through the elements 11,} of the CHI 18 is set to 1 trigger 17.

Let the signal on bus 3 arrive at the moment of time t (the moment of termination of the positive part of the bipolar pulse on bus 1). At this point in time, the trigger 14 goes to the zero state and closes KOMNryTaTop 4. The output code is 00, .. 01, i.e. regardless of the fact that the time between signals on buses 2 and 3 coincides with the duration of one positive or negative pulse, the output code corresponds to the number of positive and negative pulses passing during this time (in the cases considered, this number is equal to one)

Let us consider the cases when the number of bipolar pulses in the time interval between signals on bus 2 and 3 is more than one and none.

Let t the moment of arrival of the signal on bus 2 coincide with the positive part of the signal on bus 1. At the end of the signal on bus 2, the triggers 15 and 17 are set to 1. When the negative part of the signal from the switch 4 output arrives, the signal from the output of the NOT 7 element passes ШШ 19, sets the trigger 17 in О and sets the 1 first digit of the counter 20 on the leading positive edge. The output code is 0 ... 010.

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If the signal on bus 3 arrives at time t (passed positive and negative pulses), then the output code does not change and is 00 ... 10, which corresponds to the passage of two bipolar pulses (one positive and one negative).

0 Wire similar analysis of the operation of the device in time intervals

(t,, tg), (tg, t ,, (t ,,, t),

(t, 3, t,), we conclude that in the interval (t, tg) the number of bipolar p5 pulses is two (output code 00 ... 10), in the interval (t, t, „) the number of bipolar the pulses are three (two negative and one positive), the output code is 00 ... 11,

0 in the time interval (t ,,, t,.,) The number of bipolar pulses is also three (two positive and one negative), the output code is 00. . . 11, in the time interval (t, 3, t,) number

5 bipolar pulses are equal to five (three negative and two positive), the output code is 00 ... 101.

Thus, the proposed device for counting bipolar pulses generates a code corresponding to the number of bipolar pulses in the time interval between the signals on buses 2 and 3, regardless of whether the signals on the buses coincide with the positive or negative pulses

J rk o

2 and 3.

Claims (1)

Invention Formula Q Device for counting bipolar ryh pulses, containing an input bus, two control buses, a switch, a first trigger and a counter, an installation input in O of which is connected to the first control bus and an installation input in 1 of the first trigger, an installation input in O, and a direct output which are connected respectively to the second control bus and to the control switch house, the information input of which is connected to the input bus, characterized in that, in order to improve accuracy, two diodes are inserted into it, the element NOT, the second, third and fourth trigger s, the first and second OR elements and first, second, third, fourth, fifth and sixth AND gates, the outputs of the first and second AND soedi5 five yens, respectively, with the installation inputs to 1 of the second and third triggers, the inverse outputs of which are connected respectively to the first inputs of the second and first And elements and to the first inputs of the sixth and fifth And elements, the outputs of which are connected to the inputs of the second element ILllH, the output of which is connected to the counting the input of the counter and the input of the installation in About the fourth trigger, the installation input in 1 of which is connected to the output of the first element OR, the inputs of which are connected to the outputs of the third and fourth elements AND, the first Compiled by A.Ranov Editor S.Patrusheva Tehred M.Morgental Proofreader t.Malets the inputs of which are connected respectively to the direct outputs of the third and second triggers, the installation inputs in which are connected1 1 with additional 0 telny entrance to the O of the fourth trigger and with the first control bus, output 1 of the switch connected to the anode of the first diode and the cathode the second diode, the anode of which is connected to the input element NOT, the output of which is connected to the second inputs of the second, third and fifth elements And, the cathode of the first diode is connected to the second inputs of the first, fourth and sixth elements I. CPIJ12