SU1334391A1 - Digital demodulator of phase-difference-shift keying signals - Google Patents

Abstract

This invention relates to radio engineering and simplifies a demodulator. The demodulator contains a generator 1, a delay element 2, a regenerator 3, four elements AND 4, 5, 10 and 11, four triggers 6, 7, 12 and 13, elements OR 8 and 14 and element 9 prohibition. The relative phase telegraphy signals arrive at the D input of trigger 3, and the C input receives clock pulses from generator 1. The output information in binary code is removed from the output of the element OR 14. In the initial state, the triggers 6 in the state of O. 1 Il. Sign O)

Description

1334391 The invention relates to radio technology. Simultaneously, the pulse from the output to the elecron and can be used in the system 10 and returns trigger 6 in the isms of information transmission by the methods of relative phase telegraphy (OFT),

The purpose of the invention is to simplify the digital demodulator.

The drawing shows a structural electrical circuit of the proposed digital demodulator.

The digital demodulator contains the generator 1, the element 2 delay, the regenerator 3, the first element And 4, tre10

the initial zero state, and the trigger 12 establishes rm in the state l, thanks to which the forbidden potential appears at the first input of the element 4. In addition, the pulse from the output of the element And 10 confirms the zero state of the trigger: er 13

With the appearance of an alternating potential at the input of the regenator 5, a low signal level appears, on the front of which the next nearest clock

tiy element FROM, quarter-trigger 6 ,,

the second trigger 7, the second element OR 8, is the impulse from the output of the generator 1, the ban element 9, the second element AND 10, the regenerator ger 3 is set to

the fourth element is And 11, the first trig-state of O.

12, the third trigger 13, the first At the first input of the element AND 5 by the element OR 4, the resolving potential is resolved. On thre

The digital demodulator works after the input of the element AND 5 is present.

blowing way.

The OFT signals are received at the D input of the regenerator 3, the output of the i-gamification in binary code is removed from the output of the element OR 14.

The regenerator 3 is made on the B trigger, while the D input receives the input information in the OFT form, and the C input receives the clock pulses (TI) from the generator 1.

In the initial state, the triggers 6, 12, 7, 13 are in the state O,

After the occurrence of the OFT sequence at the input of the regenerator 3, the fronts of the OFT signal are linked to the clock pulses of the generator 1.

resolving potency: al from the inverse trigger output 13,

The next one, passes through the gateway And 5 and sets the trigger 7 25 to the state I. And ;;, the first input of the element I; 1 through the element 9 sets the resolving potential.

The next clock r-pulse from the output of the generator 1 passes through an element of 30 JVBHT AND 1 1 and then passes through the element OR 14. At you: Hf.-i- pulse appears, cooTBeTCTB t iPriS binary unit in OOT sequence.

At the same time, the impulse from the output of the element 2g AND 1 1 returns a, the trigger 7 to the initial bullet state, and the trigger 13 is set, t to the state 1, so that. It is not possible to see an EleCt inlet, for example, if on the D-input of the AND-5 belt there appears a suppression potential generator of a GREAT 40 potential. In addition to gogg ;, cmpulse exit

element And 11 sets the trigger point 12 to zero., from the inverse output, which is O to. the resolving potential at the first input of element 45 is malignant. Thus, the circuit is tuned to receive the next positive transducer; 1 yes in the OFT sequence.

signal, the trigger of the regenerator is set to state,. At the second input of PI 4, a resolving potential appears. At the first input of the element 4 there is a resolving potential from the inverse output of the trigger 2. Another clock I-IM pulse delayed (TI) passes through the element 4 and sets to state 1 the trigger b. At the first input of the element And 10 through the element OR 8 is established resolving potential.

The next clock pulse from the output of the generator 1 passes through the element AND 10 and then passes through the element OR 14. At the output, the m-i-pulse appears corresponding to the binary unit in the OFT sequence.

50

Claims (1)

Invention Formula The digital module J7 of the signals of the relative phase of telegraphy, containing a generator whose output gc is connected to the input of the regenerator, and also four elements AND, two elements OR, three triggers1: a and a prohibition element, so that, in order to simplify the digital deactivation, simultaneously the pulse from the output of the AND 10 element returns trigger 6 to i- the initial zero state, and the trigger 12 establishes rm in the state l, thanks to which the forbidden potential appears at the first input of the element 4. In addition, the pulse from the output of the element And 10 confirms the zero state of the trigger: er 13 With the appearance of an alternating potential at the input of the regenator 5, a low signal level appears, on the front of which the next nearest clock 50 Invention Formula The digital module J7 of the signals of the relative phase of telegraphy, containing a generator, the output of which is connected to the input of the regenerator, and also four elements AND, two elements OR, three triggers1: a and a prohibition element, that is, so that, in order to simplify the digital demodulator, a delay element and a fourth trigger are introduced, and the direct output the regenerator is connected to the first input of the first element AND, the second and third inputs of which are connected respectively to the output of the delay element and the output of the first trigger, whose S input is combined with the first input of the first OR element and connected to the output of the second AND element connected to R- the second trigger input and the first input the second element OR, the first combined with the first inputs of the second and fourth elements And, and connected to the output of the generator, the output of the fourth element And connected to the R-input of the first trigger, the second input of the first element OR, the S-input of the third triggerS R-inputbm of the fourth trigger and the first input of the prohibition element, the second input of which is connected to the output of the fourth trrsger, the S input of which is connected to the output of the third element I, the third input of which is connected to the output of the third trigger, whose input is connected to the output of the second trigger, the S input of which is connected e which is connected to the output of the other with the output of the first element I, the second element I, the second input of which the regenerator output is connected to the output of the second element with the first input of the third element I, the IShi5 output of the prohibition element connect the second input which is connected to the output with the second input of the fourth element of the delay element whose input is I. combined with the first inputs of the second and fourth elements And, and connected to the output of the generator, the output of the fourth element And connected to the R-input of the first trigger, the second input of the first element OR, the S-input of the third triggerS R-inputbm of the fourth trigger and the first input of the prohibition element, the second input of which is connected to the output of the fourth trrsger, the S input of which is connected to the output of the third element I, the third input of which is connected to the output of the third trigger, whose input is connected to the output of the second element I, the second input of which Connected to the output of the second element IShi5 is the output of the element of the prohibition of connections with the second input of the fourth element I.