SU739526A1 - Device for comparing two numbers - Google Patents

Description

one

. The invention relates to the field of automation and computer technology and can be used in the technical implementation of digital computer devices and automation equipment for comparing numbers.

A device is known for comparing two numbers by author. 489103, containing a counting tag generator, the output of which is connected to the inputs of the first and second counters through the input circuit I, and the transfer ports of the first and second counters are connected to. the first} inputs of the first and second triggers, respectively, the third trigger, the multi-input AND circuit and the OR circuit. The second inputs of these flip-flops are connected to the second number 4's Shiny entry, connected to the setup inputs of the second counter. The installation inputs of the first counter are connected to the recording bus of the first number. The outputs of the first and second flip-flops are connected to the inputs of the first and second output circuits K, respectively, the outputs of which are connected to the inputs of the output circuit OR. The output of the latter is connected to the output of the device. The inputs of the first multi-input

schemes And are connected to the outputs of the first trigger and the corresponding bit -. The first counter, the inputs of the second multi-input circuit I - with the outputs of the second trigger and the corresponding bits of the second counter, the outputs of both multi-input circuits AND - with the inputs of the OR circuit, the output of which is connected to the input of the third trigger.

16 Another input of the latter is connected to the recording bus of the second number. The output of the third trigger is connected to the input of the input circuit I. The transfer outputs of the first and second counters are connected to the inputs of the second and first output circuits AND, respectively, 1.

The disadvantages of this device are limited functional

20, since it only allows one to compare two multi-digit numbers in the Suspended Tolerance Field. The use of such a device for control tasks requires additional

25 equipment for setting a reference time interval and converting this interval into a digital code, which greatly complicates the device and reduces its reliability.

The aim of the invention is to expand the functionality of the device by combining the formation of reference intervals for comparing numbers.

The goal is achieved by the fact that the fourth trigger, the third AND multi-input scheme, the AND two-input scheme and the OR input are introduced into the proposed device. The setup input in the zero state of the fourth trigger is connected to the control input, and the inverse output is connected to the first input of the two-circuit AND circuit, the second input of which is connected to the output of the counting mark generator, and the output - to the riepBtoM input of the input circuit OR, the second input of which is connected to the output of the input circuit I. The output of the input circuit OR is connected to the input of the first counter. The direct output of the fourth trigger is connected to the third input of the inputN (the 5th AND circuit, the inputs of the third multi-input circuit AND are connected to the outputs of the first counter, and the output is connected to the input of the unit to the fourth state of the fourth trigger.

The block diagram of the device is shown in the drawing.

The device contains a counting generator 1, the input circuit AND 2, the first 3 and the second 4 counters, many running, circuit AND 5, 5 ,, triggers 6, 6., 6, output circuit AND lJ ,, T, circuit OR 8, DB trigger 9, multi-input circuit And 10, circuit OR 11, two-input circuit And 12.

. The device operates as follows, in the initial state, triggers 6, 6.2. close the multi-input circuits AND 5, 5 and the output circuit AND 7, 7,. ,, and the circuit AND 2 on one input is closed by the trigger signal 6 ..

When a control signal arrives from the monitored device to the input 13, the request trigger 9 is set to allow the counting pulses from the generator 1 to pass through the circuit 12. The counting pulses through the circuit OR 11 arrive at the input of the counter 3. The capacitance of the counter and the structure its construction is determined by the number of bits and the structure of information received from the monitored device. In the And 10 circuit, the Response signal is selected, which goes to output 15 and to trigger 9. From the output. 16 signal Answer,. delayed relative to the signal 3apros on a previously known etshonny time interval, arrives on the controlled. devices.

Upon arrival of the signal, Response trigger 9 returns to the initial state and prohibits the passage of counting pulses from the output of generator 1 through the AND circuit 12i Since the input of the counter 3 has a count of pulses

the clock stops, then in the counter 3 the code of the number is recorded, corresponding to the reference time interval between the signals Request and Response. Upon receipt of information from the monitored device about the measured reference time interval between the signals Request and Response signal Record received at control input 14 records this number in the second counter 4. At the same time, the Record signal sets the trigger 63 to the state where the And 2 circuit opens on one entrance. When the next signal arrives, the Response Inverted Output of Trigger 9 opens the AND 2 circuit, and the counting pulses from the generator output to counter 4 begin and simultaneously through the OR circuit to Counter 3. A comparison of two numbers, i.e. the reference number that remained recorded in the counter 3 after the selection of the Answer signal, and the number LB measured by the reference time interval between the Request and the Answer signals.

This number, which corresponds to the measured value of the time interval between the signals Request, Respond, received from the monitored device and recorded in counter 4 is less than the reference number recorded in counter 3, then the output pulse of the transfer counter turns out earlier than the output 4, on the number of pulses equal to the difference of these numbers.

The transfer pulse from the output of the counter 3 sets the trigger € in such a position that it does not prevent the passage of pulses through the AND 5 circuit and the AND 7 circuit.

At the output of the circuit, AND 5, a pulse appears only when counter 3 receives a number of pulses equal to a predetermined number given the difference in the numbers being compared. The pulse from the output of the circuit AND 5 through the circuit OR 8 is fed to the input of the trigger 6, changes its state / prohibiting thereby the arrival of the counting pulses to the input of the counters 3,4. In fact, if the difference between the reference and measured numbers does not exceed the predetermined number of pulses, it is only in this case that a transfer pulse appears at the output of counter 4, which goes through the circuits and 7 and OR 8 to the output 16 of the device.

If the difference between the reference and measured number exceeds the predetermined tolerance, then there will be no transfer pulse at the output of counter 4, since the pulse from the output of AND5 circuit appears until the transfer pulse appears from the counter and prohibits the pulse from passing to the counters 3 , 4, therefore, there is no impulse at the output 16. Similarly, the device works when the number that arrives, from the monitor of my device and writing to the counter 4 is greater than the same my set number in counter 3,. If the number is equal, the corresponding measured value of the time interval between the interrogation signals Request and Response from the monitored device and the number of the reference one recorded in counter 3, transfer pulses from the outputs of counters 3.4 appear at the same time, flip-flops 6v 62 and pass through the schemes AND 7,, 7 and OR 8.82. to the output of Device 15. Thus, in the proposed device, the functionality has been expanded, since it performs additional functions: the master of the reference time interval and the time interval converter the reference code.

Claims (1)

i The invention of the Device for Comparing two numbers on the author. 489103, which is based on the fact that, in order to expand the functionality by combining the formation of the standard of time intervals and comparison; Numbers, the fourth TpHrt-ep is entered into It, the third multiple input circuit And, the input scheme OR, and the setup input to the zero state of the fourth trigger is connected to the control input, and the inverse output is connected to the first input of the two-input AND circuit, the second input of which is connected to the output of the counting marks generator, and the output to the first input of the input circuit OR, the second input to the second is connected to the output of the input circuit AND, and the output of the input circuit OR is connected to the input of the first meter, the direct output of the fourth trigger is connected to the third input of the input circuit. And the inputs of the third multi-input circuit AND are connected to the output of the first counter, the output of the third multi-input circuit AND connected to the installation input to the unit state of the fourth trigger.