RU1826131C - Synchronized oscillator - Google Patents

Abstract

Usage: radio engineering, in devices with memory frequency. The inventive synchronized generator contains 2 keys, 2 adders, 1 delay line, 1 adjustable amplifier, 1 non-linear amplifier, 1 resonant circuit, 1 low-pass filter, 1 phase detector, 1 amplitude detector, 1 threshold element and 1 dimming voltage generator . The device adjusts the frequency of the resonant circuit to the frequency of the input signal; upon completion of the adjustment, a narrow synchronization band is provided that does not create conditions for the occurrence of spurious modulation. 2 ill.

Description

The invention relates to the field of radio engineering and can be used for long-term processing or relaying of a short-term signal, i.e., to store the frequency.

The purpose of the invention is to memorize a frequency in harmonic form over an extended frequency range.

In FIG. 1 shows a block diagram of a synchronized generator; in FIG. 2 shows voltage plots: in FIG. 2a and 26, respectively, the voltages at the input and output of the amplitude detector, in FIG. 2c and 2d are respectively the voltages at the forward and inverse outputs of the threshold element, in FIG. 2e - voltage at the output of the falling voltage driver.

A synchronized generator for storing frequency consists of series-connected to the input of the first high-frequency key 1, the first adder 2, the delay line 3, the adjustable amplifier 4, the tunable generator 5. The tunable generator 5 is made in the form of connected to the ring of the second adder 6, a non-linear amplifier 7 and tunable resonant circuit 8, covered by a feedback circuit from the output of the resonant circuit 8 to the first input of the adder 6. The control input of the resonant circuit 8 through the low-pass filter 9 with It is connected to the output of the phase detector 10, the first input of which is connected to the output of the delay line 3 and is the input of the phase locked loop, and the second input is the output of the resonant circuit 8, which is the output of the tunable generator 5 and the device as a whole.

An amplitude detector 11 is connected between the input of the first key 1, which is the input of the synchronized generator, and the input of the threshold element 12, the direct output 13 of which is connected to the control input of the first high-frequency key 1. and the inverse output 14 is connected to the control input of the second high-frequency key 15 included at the input of the first adder. Falling voltage driver 16 is connected between the output of the amplitude

09

N3 C

S

detector 11 s input control adjustable amplifier 4,

The device operates as follows.

Upon receipt of a synchronized signal generator at the input, the frequency of which must be memorized, this signal is detected by an amplitude detector 11 and two antiphase strobe pulses with a duration of 12 are formed by a threshold element 12

tf (1.1 -1.15} g3, (1)

where t 3 is the delay time of the signal in the delay line 3, which is selected from the condition

g s (0.85 - 0.9} g P5 (2)

where gr is the minimum duration of the radio pulse signal, the frequency of which must be remembered (see Fig. 2a-2d).

The strobe pulses through the outputs 13 and 14 are respectively supplied to the control inputs of the high-frequency keys 1 and 15. On the leading edge of the strobe pulses, key 1 closes the input of the device to the first input of adder 2, and key 15 opens the feedback circuit from the output of tunable generator 5 to the second input of the adder 2. Simultaneously with this dimming voltage driver 16, a signal is generated (see Fig. 2e), which sets the maximum force of the adjustable amplifier 4 so that the signal supplied to the input of the tunable generator 5. is reached Atocha for its synchronization throughout the extended operating device bandwidth. In this case, synchronization begins after a time d from the beginning of the input radio pulse, and is set to the synchronization mode during tcwHxf s.

After the end of the strobe, key 1 disconnects the input of the device from the adder 2, and the key 15 closes the feedback circuit from the output of the tunable generator 5 through the second adder 2, a delay line 3, an adjustable amplifier 4 from the input of the tunable generator 5, and the signal begins to circulate in the open circuit . As a result of repeated circulation, the frequency of the tunable generator 5 goes to the nearest possible discrete generation frequency determined by the balance of the amplitude of the m phases, i.e., the frequency is memorized with an error Afp. To eliminate the stray components of the stored signal, the voltage from the output of the delay line 3 is applied to one input of the phase detector W of the phase-locked loop, and to its second input, the voltage from the output of the tunable generator 5. The voltage from the output of the phase detector is proportional the difference between the signal frequency and the tuning frequency of the resonant circuit 8 of the tunable generator 5, is filtered out by a low-pass filter 9 and fed to the control input of the tunable generator 5, often adjusting it y to the input signal frequency. After the end of the input signal, a slow decrease in the voltage at the output of the driver 16 begins (see Fig. 2e), respectively, the gain of the adjustable amplifier 4 decreases and the synchronization band of the generator 5 narrows. Thus, the frequency of the generator 5 is simultaneously tuned to the frequency of the input signal and its band decreases synchronization to a value at which parasitic components of the spectrum are absent, make it possible to memorize the frequency of a short radio pulse in harmonic form in an extended frequency range.

Claims (1)

SUMMARY OF THE INVENTION A synchronized generator comprising a series-phase locked loop, a first key and a first adder, as well as a threshold element, the output of which is connected to the control input of the first key, and a delay line, a phase locked loop contains a phase detector, a low-pass filter and a tunable generator, the input of the phase detector is the input, and the output of the tunable generator is the output of the phase-locked loop and is connected to the input of the first key and another input of the phase detector, characterized in that, in order to memorize the frequency in a harmonic form in the extended frequency range, a second key is inserted into it, included at the input of the first adder, an amplitude detector connected between the input of the second key, which is the input of the synchronized generator, and the input of a threshold element equipped with an inverse output, an adjustable amplifier connected between the output of the delay line and the direct synchronization input of the adjustable generator, and the former drops voltage connected between the output of the amplitude detector and the control input of the adjustable amplifier, the control input of the second key is connected to the inverse output of the threshold element, while the adjustable generator is made in the form of a second adder connected to the ring, a nonlinear amplifier and a controlled resonant circuit, the second input the second adder is the input synchronization, and the output is resonant between the output of the first summand circuit - the output of the tuning device and the input of the phase locked loop of the generator, and the frequency delay line. Figure 1 h-u-i Editor T. Shubina Compiled by V. Timonov Tehred M. Morgenthal FIG. 2 Corrector P. Gereshi