SU1140225A1 - Positive and negative pulse sequence discriminator - Google Patents

Abstract

DIRECT AND REVERSE PULSE DISCRIMINATOR of impulses containing first trigger, 5 and R-inputs of which are connected respectively to the first and second input buses, the second trigger, the first and second output buses, and the first inputs of the first and second I-NOT elements are connected to the first and second input buses, respectively, the second inputs are connected respectively to the direct and inverse outputs of the first trigger, and the outputs respectively to the 5 and R inputs of the second trigger, the first input of the third The AND-NOT element is connected to the inverse output of the first trigger, the second input to the direct output of the second trigger, the first input of the fourth AND-NOT element is connected to the direct output of the first trigger, and the second input to the inverse output of the second trigger, characterized in that , in order to increase processing accuracy, a third trigger has been entered into it, 5 and ft inputs of which are connected to the third and fourth input buses, the fourth trigger, and also from the fifth to the fourteenth elements AND –NE, and the first inputs of the fifth and sixth elements are NOT connected according with the third and fourth input buses, the second inputs with the direct and inverse outputs of the third trigger, and the outputs, respectively, with S - and the R inputs of the fourth trigger, while the direct output of the first trigger is connected to the first input of the tenth element NOT, inverse output - with the first input of the twelfth element NAND, direct output of the second trigger - with the first inputs of the seventh and ninth element NAND and the second input of the twelfth element NAND, inverse output - with the first inputs of the eighth and eleventh and the second entrance dec About the NAND elements, the direct output of the third trigger is connected to the second inputs of the eighth and ninth elements of the NAND, the inverse output is connected to the second inputs of the seventh and eleventh AND elements, the direct output of the fourth trigger is connected to the third inputs of the fourth, seventh , the eleventh and twelfth elements are NAND, the inverse output is with the third inputs of the third, eighth, ninth and tenth elements of the NAND, with the first to the fourth inputs of the thirteenth AND AND element connected to the outputs of the third, seventh, fourth of the first and eighth elements NAND, and the output - with the first output bus, from the first to the fourth inputs of the fourteenth element AND - NOT connect

Description

not with .vkodami respectively with in addition to the twelfth elements

J140225

de-AND-NOT, and exit, -c- second output bus.

The invention relates to a pulse technique and may find application in phase-frequency discriminators.

A discriminator of pulse sequences is known, containing triggers, elements AND and OR, intended for processing a four-letter basis alphabet and forming a two-letter output alphabet 1.

A disadvantage of the known device is low resolution.

The closest to the proposed technical entity is a discriminator containing a first trigger, 5- and f-inputs of which are connected respectively with the first and second input buses, the second trigger, the first and the second AND-NOT elements, the first and second output tires, and first entrances of the first and second. the second IS inputs are connected to the first and second input buses, respectively, the second inputs are connected to the direct and inverse outputs of the first trigger, respectively, and the outputs to 5 - and K, - inputs of the second trigger, the first input of the third AND – IS element is connected with the inverse output of the first trigger, the second input with the direct output of the second trigger, the first input of the fourth AND-NOT element is connected to the direct output of the first trigger, and the second input - with the inverse output of the second trigger, the outputs of the third and fourth AND-NOT elements are connected to first and second output tires S2.

The known device discriminates the sequence of pulses.

However, the known discriminator does not respond to the sign of different discriminatory frequencies, since for both signs the same sequence of discrimination pulses is obtained, i.e. does not provide sufficient processing accuracy.

The goal is to improve processing accuracy.

The goal is achieved by the fact that the discriminator of the forward and reverse sequences of impulses containing the first trigger, 5- and R-inputs of which are connected respectively with the first and second input buses, the second trigger, the first and the fourth output buses, the first inputs of the first and second elements AND-NOT are connected respectively to the first and second input buses, the second inputs are connected respectively to the forward and inverse outputs of the first trigger, and the outputs respectively to the 5 and R inputs of the second first trigger, the third input of the third AND-NOT element is connected to the inverse output of the first trigger j, the second input — to the direct output of the second trigger; the first input of the fourth AND-NOT element is connected to the direct output of the first trigger, and the second input — to the inverse output of the second trigger, entered a third trigger, S - and R-inputs of which are connected to the third and fourth input buses, a fourth trigger, as well as from the fifth to the fourteen AND-NOT elements, and the first inputs of the fifth and sixth AND-NOT elements are connected respectively from the third and fourth entry buses, second inputs with direct and inverse outputs of the third trigger, and outputs respectively with 5 and R-BXO of the fourth trigger, while the direct output of the first trigger is connected to the first input of the tenth NAND element, inverse output is with the first input of the twelfth element NAND, direct output of the second trigger — with the first inputs of the seventh and ninth elements NAND and the second input of the twelfth element NAND, the inverse output with the first inputs of the eighth and eleventh and second elements of the tenth element NON, pr my exit of the third trigger a is connected to the second inputs of the eighth and ninth elements of NAND, the inverse output is connected to the second inputs of the seventh and eleventh elements of NAND, directly the output of the fourth trigger is connected to the third inputs of the fourth, seventh, eleventh and twelfth elements AND NAND, an inverse output with the third inputs of the third, eighth, ninth, and tenth elements of the NAND, while from the first to the fourth inputs of the thirteenth element AND-N are connected to the outputs of the third, seventh, fourth and -i of the eighth AND-N, respectively and exit from the first exit second bus, the first through fourth input fourteenth AND-NO element are connected respectively to the outputs of the ninth dvenad tsatm AND-NO elements, yet yield - a second output bus. Due to the specified features, the device distinguishes the sequences X, X, X ... X ..... and A3 V V V A2 corresponding to different signs of the difference between discriminated parts, i.e. provides more high precision machining compared to the prototype. The drawing shows a functional diagram of the discriminator of the direct and inverse sequence of pulses. The discriminator contains the first trigger 1, 5 and R-input of which

Dineny, respectively, with the first 2 and second 3 input buses, second trigger 4, first 5 and second 6 I-NOT elements, the first inputs of which are connected to input buses 2 and 3, respectively, the second inputs - with direct and inverse outputs of trigger 1, and outputs with 5- and R-inputs of trigger 4, third 7 and quarter 8 AND-NOT., output buses 9 and 10, third trigger 11, S and R-inputs of which are connected respectively to the third 12, and fourth 13 input buses , the fourth trigger 14, 5 and R inputs of which are connected to the outputs, outputs of the fifth 15 and sixth 16 elements AND-NOT, the first input which are connected according to the third 12 and fourth 13 input buses, second inputs - with direct and inverse outputs of the flip-flop 11, and the seventh to fourteenth AND-NO elements 17-24.

corresponding to decreasing frequency indices of the signals X {, X are equal to the frequency of changing the indices of the signals. The signals Xd - Xd are either pulses or bursts of logical zeros.

If the numbers of the numerical indices of the input signals XD are continuously alternated in one direction (1, 2, 3, 4, 1 ... or 4, 3, 2, 1, 4 ..), then with the arrival of the next pulse (pack) to any input device at one of its outputs is formed next impulse.

Since the device in question is part of the (output) digital (logical) frequency discriminator, the frequency of the signals X,, Hz is, for example, the discriminator difference frequency (positive X {, negative X), and the input signals Xd are output signals the other part 254 Direct trigger input 1 is connected to the first inputs of the elements AND-HE 8 and 20, the inverse output is connected to the first input of the elements AND-NOT 3 and 22, direct output of the trigger 4 is connected to the first inputs of the elements AND-HE 17 and 19 and the second input element AND NOT 22, the inverse output — with the pitch inputs of the AND-HEY elements 18 and 21 and the second input of the AND-HEY element 20, the direct output of the trigger 11 is connected to the second inputs of the AND-HEY elements 18 and 19, the inverse output with the second inputs of the AND-17 elements and 21, the direct output of the trigger 14 is connected to the third inputs of the AND-NE elements 17, 8, 21 and 22, and the inverse output to the third inputs of the AND-NE elements 7, 18, 19 and 20. From the first to the fourth inputs, the AND elements -NON 23 connected to the outputs of the elements AND-NOT 7, 17, 8 and 18, respectively, and the output of the element AND-NOT 23 - with the output bus 9. From the first to the fourth inputs are the elements AND-NOT 24 are connected to the outputs of the AND-NE elements 19, 20, 21 and 22, respectively, and the output is connected to the output bus 10. 12 and П pONA input buses 2, 3, the signals X, X, V А2 step TT and Ai, respectively. On the output bus 9, a corresponding age signal X is formed for the numerical indices of the signals arriving at the device inputs, and the output bus 10 is the X signal, 5 of the discriminator — the X alphabet alphabet generator. The duration of the output signals H., Hu of the proposed device is equal to the duration of the first impulses of any bundle of them on any input bus. The order of interaction of the elements of the device depends on the initial conditions, i.e. from the initial states of the memory elements - triggers. Consider the operation of the device in the situation when all the triggers are in the zero position and the X signal is expected. In this state, the AND-HE elements 7,8, 17-22 are closed. With the arrival of Xd4 (zero level), the trigger 11 is set to position 1, preparing the operation of the element AND-NOT 15 and at the same time a signal is formed at the output through the opening element AND-NOT 18. With the end of Xd, a logical zero appears at the output of the NAND 15 element, and the flip-flop 14 tilts into a single position, the recorder plays the T-element 18. If X follows the X signal, it sets the flip-flop 1 to the single position, which allows element 8 and therefore, an output signal is generated. With the ending X, a logical zero appears at the output of element 5, and the trigger 4 is tilted to the single position, locking element 8, and so on. With the arrival of a sign with a large index (by one, followed by Xd followed by X), at the output of element 23, signals X are formed without skipping the input letters. If the index number decreases (after X, follows X)), the signals are formed at the output of element 24. Thus, the device forms signals at one of the outputs depending on the order of the input signals in the sequence and without missing pulses of the basic alphabet. Tie. Provides high accuracy and enhances processing resolution.

Claims (1)

DISCRIMINATOR OF DIRECT AND REVERSE PULSE SEQUENCE, containing the first trigger, 5 “and R-inputs of which are connected respectively to the first and second input buses, the second trigger, from the first to the fourth AND-NOT elements, the first and second output buses, the first inputs of the first and second the second elements AND are NOT connected respectively to the first and second input buses, the second inputs are connected respectively to the direct and inverse outputs of the first trigger, and the outputs, respectively, to the 5 ~ and R inputs of the second trigger, the first input of the third element AND-NOT connected to the inverse output of the first trigger, the second input to the direct output of the second trigger, the first input of the fourth element AND-NOT connected to the direct output of the first trigger, and the second input to the inverse output of the second trigger, characterized in that, in order to to increase processing accuracy, a third trigger is introduced into it, 5. - and the R-inputs of which are connected to the third and fourth input buses, the fourth trigger, as well as from the fifth to fourteenth AND-NOT elements, with the first inputs of the fifth and sixth AND-NOT elements connected respectively to tr third and fourth input buses, the second inputs with direct and inverse outputs of the third trigger, and the outputs, respectively, with S and R inputs of the fourth trigger, while the direct output of the first trigger is connected to the first input of the tenth element AND NOT, the inverse output is with the first input of the twelfth AND-NOTH element, the direct output of the second trigger - with the first inputs of the seventh and ninth AND-NOT elements and the second • input of the twelfth AND-NOT element, inverse output - with the first inputs of the eighth and eleventh and the second input of the tenth AND- NOT direct the output of the third trigger is connected to the second inputs of the eighth and ninth NAND elements, the inverse output is to the second inputs of the seventh and eleventh NAND elements, the direct output of the fourth trigger is connected to the third inputs of the fourth, seventh, eleventh and twelfth NAND elements, inverse the output is with the third inputs of the third, 'eighth, ninth and tenth AND-NOT elements, while the first through fourth inputs of the thirteenth AND-NOT element are connected to the outputs of the third, seventh, fourth and eighth AND-NOT elements, yield - a first output line, the first to fourth inputs fourteenth NAND soediSU 1140225 J 140,225 yen with outputs, respectively, with de-AND-NOT, and output .-, with · the second output is sixth in twelfth elementary.