SU636789A1 - Signal comparator - Google Patents

Description

one

The device relates to a measurement technique, can be used in analog-digital converters, automation systems and automatic control systems.

A device for comparing signals is known comprising a difference extraction unit and a generator 1.

The disadvantage of this device is relatively low accuracy.

A device for comparing signals is known, comprising a signal difference selection unit, an RS trigger, a pulse generator, and a JK trigger 2J.

A disadvantage of this signal comparison device is the low stability of the hysteresis zone.

The purpose of the invention is to increase the stability of the 30Hfj hysteresis.

The goal is achieved by the fact that a displacing unit, RS trigger, an emulsion generator and a JK trigger are inserted into the signal comparison unit, a bias block, a leading edge extraction element, four AND elements, an OR element, and an additional RS trigger,

The Soros input of which is connected to B1 by the bias block stroke, the input of which is connected to the output of the signal difference separator and the reset input of the RS flip-flop. the installation input and the unit output of which are connected respectively to the output of the first element AND and the first input of the second element: the output and the second input of which are connected to the appropriate interface with the input element OR and HcpBiiiM input of the first element I.) which is also connected with the first inputs of the third and chover1O elements And and the output of the pulse generator, the second inputs of the third i; the fourth element And the connection) with single outputs respectively JK-flip-flop and additional RS-flip-flop, the installation inputs of which are connected respectively with the output of the leading edge selection element and the output of the third element I. the inverse outputs of the additional RS-flip-flop and JK trigger are connected respectively to the input of the selection element the leading edge and the second input of the first element AND, and the second input and output of the OR element are connected respectively to the output of the fourth i element and the counting input of the JK flip-flop.

In the drawing, a diagram shows the structured V.ICK structural scheme of the device.

The signal comparison device comprises a signal difference extraction unit. RS Trigger 2, Generator I. Pulses 3, JK-Tpiirger 4, B; Mix 5, Element of Front Edge 6, Elements AND 7-10, Element OR 11 and Additional CPS-Trypsr 12, KOTopoio reset input connected to the output interchange unit 5, whose input is connected to the output of the difference difference signal block 1 and the reset input of RS-trnger 2. The input is set and the single output of trigger 2 are connected respectively to the output of the element And 7 II by the nerve input of the element 8, the output and the second input of KOTOpoio are connected respectively with a nerve input e..emegga OR 1 1 and the first input of the element AND 7, which ry connected to the nerves I1 by the inputs of elements 9, 10 and the output of the pulse generator 3. The second inputs of elements 9 9. 10 are connected to single outputs respectively JK-trngger 4 and RS-flip-flop 12, the set inputs are connected x1 respectively to the output of the selection element in the middle () of the pitch 6 and the output of the And 9 element. Inverse 1 1 outputs of the RS-12 12 and JK-Tpiiirepa 4 connection: respectively, with the input of the leading edge element, 6 n second | the element And 7,; i the second input and output elements: ta OR 11 are connected respectively with the output of the element And 10 and the counting input of the LC - trigger 4.

The device works as follows.

In the initial state, the triggers 2, 4 and 12 are set to "single states. Depending on the magnitude of the signal Ux coming from the signal difference difference unit 1, the output signal may take three times; 1 the values. If Un: - threshold triggering trigger 12, brought to the input of the mixing master 5, Uva - trigger trigger threshold 2, and "a single change from the JK trigger 4 allows the second input of the element 9 to allow polling trigger 12 with generator 3 pulses, then:

1 .. Under this condition, the pulse of polling the state of the device, the comparison of signals does not change. :

2.Un2. With this CONDITION, the trigger 12 is set to the "zero state." A polling pulse from generator 3 generates a pulse at a single output of trigger 12, which, through elements AND 10 and OR 11, flips the JK trigger 4 to the "zero state." High potential with inverted trigger output 4 permits by the second

the input element AND / polling of the RS flip-flop 2. The circuit remains in this state if the signal. 1 LX is in the zone specified by the value of Lni and Uns.

3. Ux LPs LlfTi. The first p.pulse of the interrogation that passed through the AND 7 element, trigger 2, the AND 8 element, the OR 11 element, transfers the JK trigger 4 to the "one state". The second polling pulse triggers a trigger 4 b) into the zero state, and so on. Thus, at the output of the JK trigger 4, a periodic impulse signal is observed: 1.

Claims (2)

1. Author's certificate of the USSR 50 361734, cl. G 06 F 7/02, 24.05.71. 2. Authors certificate of the USSR Law 466485, cl. G 05 B 1/01, 10.12.75. f