SU542957A1 - Phase synchronization indicator of radio pulses - Google Patents

Description

The AI is connected to the first input of the imaging unit 7, and the second output to the nerve input of the AND 2 circuit, the second AND 10 circuit, the second accumulation circuit 11, consisting of the series-connected counter integrator 12, the trigger 13 and the omnidation circuit 14. The second inputs of the circuits And 2, 10 are connected to the output of the in-phase detector 1, and the outputs of these circuits are connected to the second inputs of the respective integrator counters 4, 12, the first input of the second circuit And 10 is connected to the third output of the chroniser 8, the output of the former 7 is connected to the first input of the counter integrator 12 and the second entrance trigger 13, the output of the integrator 12 is connected to the second input of the imaging unit 7 and the input of the chroniser 8, and the output of the counting integrator 4 is connected to the third input of the imaging unit 7.

Synchronization indicator in the phase of radio pulses works as follows.

The signal input of the in-phase detector 1 receives the signal voltage, and the on-input input-reference voltage from the phase of the next circuit along the carrier. In the case of synchronization of the phases of both voltages, the in-phase detector 1 forms code units, for example, at the zero crossing points of these voltages, which are fed to the AND 2, 10 circuits, and their other inputs are supplied by the chroniser 8, which are inverse pulsed sequences in which the frequency of repetition and the duration of the pulses are equal to the repetition frequency and duration of the radio impulses of the signal.

As a result of the coincidence of the code units and the voltage of the chroniser 8, which corresponds to the scale of the reference but envelope, pulses are received from the output of the AND 2, 10 circuits to the inputs of integrator counters 4, 12 in accumulation chains 3, 11, respectively. The accumulation time of the code units needed to make a decision about phase-to-phase synchronism is determined by counter 9.

If there is no phase matching of the carrier, then only a small random number of code units can be generated at the output of the in-phase detector 1, and none of the integrator counters 4, 12 is filled during the time determined by the counter 9. With the help of a pulse from the output of the counter 9 the driver 7 generates a signal that sets the integrator counters 4, 12 and the triggers 5, 13 to zero, while low potentials are removed from the outputs of the triggers 5, 13, according to which the indication circuit 6, 14 signals the absence of phase synchronization guide.

If the reference voltage of the phase-following circuit along the carrier is synchronized with the high-frequency filling of the radio pulse, and the reference voltage of the synchronizer B along the envelope is synchronized with the radio pulse envelope, then the integrating counter 4 is filled earlier than the integrating counter 12 and the time counter 9. The impulse from the output of the imager 7, generated by the output signal of the counter-integrator 4, sets the integrator counters 4, 12 and triggers 5, 13 to zero, a high potential is generated at the output of the trigger 5, and the indication circuit 6 signals carrier phase synchronism and the envelope phase.

If the reference voltage over the envelope is unsynchronized with the envelope of the radio pulses, and the reference voltage across the carrier and high-frequency signal filling are synchronized in phase, the integrator counter 12 is filled, the pulse at the output of the former 7 sets the counter of the integrator 4, 12, triggers 5 to zero, 13, a high potential is formed at the output of the flip-flop 13, and the indication circuit 14 signals synchronization with the carrier phase. The outputs of counter integrator 12 are inserted into chroniser 8 and can be used to synchronize the reference scale in phase and envelope.

Thus, the proposed indicator increases the reliability of the indication of synchronism in the carrier phase at any position of the reference scale of the chroniser relative to the envelope of the radio pulses, indicates synchronism in the phase of the envelope and receives information about the degree of out-of-sync

envelope, which increases the reliability and reliability of measurements and expands the range of devices using the indicator.

Claims (1)

1. U.S. Patent D-3577178, cl. 324 / 83D, 1971 -sign. fonaflH.