SU1145452A2 - Frequency-shift keyer - Google Patents

Abstract

1. FREQUENCY MANIPULATOR on avt., Sv. No. 1019582, characterized in that, with increasing reliability, an additional phase shifter, an adder and a driver pulse generator, the first input of which is connected to the output of the first crystal oscillator, are entered into it, the outputs of the first and second electronic keys are connected to the first input of the frequency converter via an adder, the third the input of which is connected to the output of the compensating pulse generator, the second and third inputs of which are connected to the outputs of the first and second elements, respectively, and the output is The quartz oscillator is connected to the fourth input of the compensating impulse generator and via an additional phase shifter to the first input of the second electronic key. 2. Manipulator according to claim 1, characterized in that the compensating pulse driver contains the first, second and third: keys, first and third phasers, two balanced amplitude modulators, a switch and a pulse trainer, the first outputs of which are connected to the first , the switch inputs, the first outputs of which are connected to the first inputs of the corresponding second keys, whose codes are connected to the inputs of the corresponding second phase shifters, the outputs of which are connected to the first ry input of the first balanced am the capacitor modulator, and to the outputs of the first phase shifters, the inputs of which are connected to the outputs of the respective first keys, the first inputs of which are connected to the first inputs of the corresponding third keys and the second outputs of the switch, the second input of which is connected to the first input of the pulse shaper, the second VOKOD; connected to the second input of the first amplitude balanced -: modulator and the first input of the second amplitude balanced modulator, 4 Ol whose second input is connected to the outputs of the third ф The rotators whose inputs are connected to the outputs of the corresponding third keys, C71 whose second inputs are combined and tsD are the first input of the compensating impulse generator, the second and third inputs of which are the first and second impulse generator, the combined second inputs of the first and second keys are the fourth input of the compensating pulse generator, the output of which is the combined outputs of the first and second balanced amplitude modulators. , ch. ,, .. ---, ... NIA f 13 y. .-. f3 f ,, .. .- -f: - - .., - D. l- /// /% l. but

Description

3. Manipulator according to claim 2, characterized in that the pulse shaper comprises square-wave generators, a weight sum, and an OR element, the output of which is connected to one weight input of the matrix through series-connected square pulse generators, the other inputs of which are connected to the outputs of the respective square pulse generators, the inputs of the OR element being inputted by the first and second inputs of a pulse trainer, the first codes of which are generators moves rectangular pulses, and the output of the weighting adder is the output of the second pulse sequence.

The invention relates to radio engineering and can be used in radio communications, radiolocation, radio telemetry for the formation of frequency-manipulated (FM) sine-wave oscillations.

yo main auth. St. No 1019582 and the most known frequency manipulator 11, containing a source of control signals, two quartz oscillators, whose steps through controlled electronic keys are connected to a heterodyne spectrum converter consisting of a quartz oscillator, frequency converter and phase detector, the first input of which is connected to Steppe one of the quartz oscillators through the phase-shifting circuit, the second - directly, and its output through a series-connected low-pass filter, threshold unit with differentiated circuit two AND gates controlled by egfsh pirofaznyh outputs source signals connected to the control inputs of the electronic switches, the first output of the crystal oscillator connected to the dongle through the phase shifter size or

& U3

4 "2arc-t5

2A

d ie - the difference between the frequencies

Where

quartz oscillators; 2 cL- load bandwidth of the frequency manipulator.

However, the known manipulator is characterized by insufficient reliability.

The purpose of the invention is to increase credibility.

To achieve this goal, a frequency manipulator containing 5 sources of control signals, two quartz oscillators, the outputs of which through controlled electronic keys are connected to a heterodyne spectrum converter consisting of

10 quartz oscillator, frequency converter and phase detector, the first input of which is connected to the output of one of the quartz oscillators through a phase-shifting circuit, the second one directly, and its output through a serially connected low-pass filter, a threshold unit with a differentiating circuit and two AND elements controlled from paraphase

20 outputs of the signal source are connected to the control inputs of electronic switches, the output of the first crystal oscillator is connected to the electronic switch through a phase shifter for a magnitude.,

L.Sh

V 2arci

Tog

where di5 is the difference between the frequencies

quartz oscillators j 2 - prispuskan load. ki frequency manipulator tdra, introduced an additional phase shifter, adder and shaper compensating dih pulses, the first input of which is connected to the output of the first; quartz oscillator, the outputs of the first and second electronic keys are connected to the first input of the frequency converter through the adder, the third input of which is connected to the output the driver of the compensating pulses, the second and third inputs of which are connected to the outputs of the respectively first and second elements I, and the output of the second crystal oscillator is connected It is supplied to the fourth input of the compensating impulse generator and through an additional rotator to the first input of the second electronic key. The compensating pulse driver contains the first, second and third keys, the first, second and third phasers, two balanced amplitude modulators, the switch and the pulse trainer, the first outputs of which are connected to the first inputs of the switch, the first outputs of which are connected to the first inputs of the corresponding second keys, the outputs of which are connected to the inputs of the corresponding second phase shifters, the outputs of which are connected to the first input of the first balanced amplitude modulator, and to the outputs of the first phase shifters, the inputs of which are connected to the outputs of the corresponding first keys, the first inputs of which are connected to the first inputs of the corresponding third keys and the second outputs of the switch, the second input of which is connected to the first input of the pulse trainer, the second output of which is connected to the second input of the first amplitude balanced modulator and the first input of the second amplitude balanced modulator, the second input of which is connected to the outputs of the third phasers, whose inputs are connected to The corresponding third keys, the second inputs of which are combined and are the first input t of the compensating impulse generator, the second and third inputs of which are the first and second inputs of the impulse train, the combined second inputs of the first and second keys are the fourth input of the compensating impulse generator, the output of which is the combined outputs of the first and second balanced amplitude modulators. In addition, the pulse shaper contains square-wave generators, a weight adder, and an OR element, the output of which has sequentially connected square pulse generators connected to one input of a weight adder, the other inputs of which are connected to the outputs of the corresponding square pulse generators, and the inputs of the OR element are the first and second inputs of the pulse trainer, the first outputs of which are the outputs of the generators rectangular to them pulses, and the output of the faithful adder is the second output of the pulse trainer. FIG. 1 shows the structural electrical circuit of the proposed frequency manipulator J in FIG. 2 shows the electrical layout of the former compensating for pulses; FIG. 3 - structural electrical. the circuit diagram of the pulse trainer; in fig. 4 diagrams of the device. The frequency manipulator contains the first and second quartz oscillators 1 and 2, the first electronic key 3, the adder 4, the frequency converter 5, the load block 6, the phase shifter 7, the additional phase shifter 8, the second electronic key 9, the driver 10 compensating pulses, the first 11 and the second 12 elements And, phase detector 13, low-pass filter 14, threshold unit 15, signal source 16, phase-shifting circuit 17 and quartz local oscillator 18. The compensating pulse former contains the first 19, second 20 and third 21 keys, first 22, second 23 and third 24 phase shifters, first and second balanced amplitude moduli tori 25 and 26, pulse generator 27 and switch 28. Pulse sequence former contains the element OR 29, square pulse generators 30 and weight adder 31. The frequency manipulator works as follows. Assume from 5. The output voltage of the crystal oscillator 2 is phase-compared with the surge voltage of the crystal oscillator 1, shifted in phase by an angle of 4i 90, in the azov detector 13. At the time of phase equality of these voltages

By the action of the output voltage of the low-pass filter 14, the threshold unit 15 generates a short-term positive polarity pulse arriving at the second inputs of the And 11 and 12 elements controlled from the pyrophase outputs of the signal source 16. If at time T, the upper frequency U5g is turned on, then the output of element 11 is produced by a pulse of positive polarity (Fig. 4o), opening key 3 and incoming compensating pulses to the third input and input to the pulse sequence generator 27. The leading edge of this pulse is triggered by a chain of 30 rectangular generators, pulses, producing three successive rectangular pulses of the same amplitude and polarity with duration G (Fig. 4Y). These pulses go to the first inputs of the switch 28, controlled by the output voltage element 11. As a result, the corresponding keys 19, 20 and 21 are opened. Through the public keys, the output voltages of the quartz oscillators 2 and 1, respectively, are fed to the inputs of the balanced amplitude modulators 25 and 26, shifted in phase to the corresponding angles. The other inputs of the balanced amplitude modulators 25 and 26 receive pulses from the output of the weight adder 31, the amplitudes of which vary in accordance with the law of change in the conductivity of its inputs (Fig. 4d). As a result, at the outputs of balanced amplitude modulators 25 and 26, radio pulse signals (Fig. 4g and 6, respectively) are accumulated, which are added to the voltage produced by a quartz generator 2, phase-shifted by an Fz angle, and through the frequency converter 5 are fed to the input ( Choke 6 load. At this, the transient process in the load block is localized on the interval 31 (Fig. 4), which is significantly less than the prototype (Fig. 4g :). If at the time of T + T

switching from the upper frequency to the lower frequency Fc occurs, then the output of the element I 12 produces a pulse (Fig.), an opener key 3 and the compensating pulses arriving at the second input of the imaging unit 10 and the second input of the imaging unit 27 of the pulse sequence. The output pulses of the generators 30 rectangular pulses (Fig. 4)

arrive at the inputs of the switch 28. As a result, the corresponding keys 19, 20 and 21 are opened. Radio pulses formed in balanced amplitude modulators 25 and 26

(Fig. 4c and e., respectively) are summed with a voltage produced by a quartz oscillator 1 shifted in phase by an angle f. As a result of the interaction of these voltages, the transient process in the load unit 6 stops at 3 T after the frequency manipulation (Fig. 4). From the comparison of FIG. it follows that using the proposed device,

can significantly increase the accuracy of the formation.

The present invention reduces non-linear distortion.

FM signals by reducing the duration of transients in the load unit. This ensures that the reliability of information transmissions in radio communications, radiolocation, radio telemetry and radio control is increased. In addition, applying the invention increases the modulation rate at a constant channel bandwidth. The implementation of the proposed

My device allows, by compensating for transients, to increase the modulation rate by more than 2 times.

1

tt

J j

J / 7

thirty

.five

Claims (3)

1. FREQUENCY MANIPULATOR by ed. St. No. 1019582, characterized in that, with a whole increase in reliability, an additional phase shifter, an adder and a compensating pulse generator are introduced into it, the first input of which is connected to the output of the first crystal oscillator, the outputs of the first and second electronic keys are connected to the first input of the frequency converter through the adder, the third input of which is connected to the output of the shaper of compensating pulses, the second and third inputs of which are connected to the outputs of the first and second elements And, respectively, and the output is second of the crystal oscillator connected to the fourth input of the compensating pulse and through an additional phase shifter to the first input of the second electronic key. 2. The manipulator according to claim 1, characterized in that the compensating pulse shaper comprises first, second and third keys, first and third phase shifters, two balanced amplitude modulators, a switch and a pulse sequence former, the first outputs of which are connected to the first the inputs of the switch, the first outputs of which are connected to the first inputs of the corresponding second keys, the outputs of which are connected to the inputs of the corresponding second phase shifters, the outputs of which are connected to the first input of the first balanced amp of the current modulator, and to the outputs of the first phase shifters, the inputs of which are connected to the outputs of the corresponding first keys, the first inputs of which are connected to the first inputs of the corresponding third keys and second outputs of the switch, the second input of which is connected to the first input of the pulse sequence former, the second output: which is connected to the second input of the first amplitude balanced ^ modulator and the first input of the second amplitude balanced modulator, the second input of which is connected to the outputs of the third phase shifter lei, the inputs of which are connected to the outputs of the corresponding third keys, the second inputs of which are combined and are the first input of the compensating pulse generator, the second and third inputs of which are the first and second inputs of the pulse sequence generator, the combined second inputs of the first and second keys are the fourth input impulse compensator> ow, the output of which is the combined outputs of the first and second balanced amplitude modulators. 3. The manipulator pop. 2, characterized in that the pulse sequence generator comprises rectangular pulse generators, a weight adder and an OR element, the output of which through series-connected rectangular pulse generators is connected to one input of the weight adder, the other inputs of which are connected to the outputs of the corresponding rectangular pulse generators, and the inputs element OR are the first and second inputs of the pulse train, the first outputs of which are the outputs of the generators directly angular pulses, and the output of the weight adder is the second output of the pulse train.