SU580622A1 - Device for automatic tuning of selective four-pole network - Google Patents

Description

one

The invention relates to radio engineering.

A device for autotuning a selective quadrupole is known, comprising a phase detector, the inputs of which are connected respectively to the input and output of the selective quadrupole, and the output to the control input of the selective quadrupole via control element 1.

However, the known device “e provides high accuracy settings.

In order to improve the accuracy of tuning in the proposed device for autotuning, the selector of the four quadruple between the outputs of the four four poles and the input of the control element is connected sequentially connected to the resistor and dololitelny 1 phase detector, the other inputs of which are connected respectively to the first input and output four selector four phase detector, the other inputs of which are connected respectively to the first input and output four selector four phase detector, the other inputs of which are connected respectively to the first input and output four selector four phase detector

The drawing shows a block diagram of the proposed device.

A device for auto tuning a selective quadrupole contains a phase detector .1, the inputs of which are connected respectively to K (INPUT and the output of the selective quadrupole 2, and the output to the control input of the selective quadripole 2 through the controlling element 3, and between the outputs of the selective quadripole 2 and the input control element 3 included

series-connected adder 4 and an additional phase detector 5, the other inputs of which are connected respectively to the input and output of a selective four) pole 2.

The device works as follows. - Directly from the input and output of the selective quadrupole 2, the signals are received and the inputs of the phase detector 1. To the inputs of the additional phase detector 5, the signals are output from the selective quadrupole 2 and from the output of the dry DC1 and f / 2 signals, respectively outputs of the phase detector 1 and the additional phase detector 5 are summed up and received and the input of the control element 3, which affects the frequency of the setting of the quadripole 2 until the signal U Ui -} - U2 at the input

controlled element 3 does not become equal to zero.

If (VSP1-ih harmonics are present in the INPUT signal, then the signal f / i at the output of the iBoro detector 1 is zero not at the frequency / o

of the main harmonic of the input sitpal, and some interpolation between the tuning frequency / p of the four-pole selective pole. 2 and the frequency / o on A /, when the zero moments of the transition signal

Claims (1)

will turn out to be the commutative phase shift φ of the main (harmonics, out of the two-quadrupole 2 environment to the frequency D /. The input of the additional phase detector 5 from the output of the adder 4 is affected by a complex signal that passes through zero zero over the transition moment The input signal of the signal has the same shift value, but a different sign. In the characteristic, the characteristic of the additional phase detector 5 turns out to be shifted by A / relative / o and the signal f / 2 "and the output of the additional phase detector 5 is equal to zero detuning and D / when the bi-quadrupole 2 1 TAKES that main harmonic phase -savg. When the signals f / i and / 2 are added, the signal U is obtained, which is equal to zero — if the frequency of the tuning fp ic is precisely combined by the frequency fo of the main irap-monica of the input signal. The required shift of uncoupling moments through the ul of a complex signal from the output of adder 4 is ensured by the fact that adder 4 together with the selective quadrupole 2 forms a link with Coe | ffi | kibntam transmission K. where q is the quality factor of the electoral quadruple one1 C1nik 2; 7 - generalized detuning, y - A - / p / P 7-modulus of the transfer coefficient K.z of this link is equal to one, and (the phase shift Φ2 introduced by the link depends on the detuning frequency and is determined by the expression Φ2 - 2arctg {gy). Thus, the three detuning “and the acto aveno 1 introduces a phase shift, at 9:10 and f2 1176 °, iri 20. Consequently, the signals at the input of the electoral quadripole 2,” and the output of the adder 4 are provided that the tuning frequency / p of the four-quadrupole 2 combined with the frequency of the main harmonic of the input signal, have exactly the same frequency and amplitude spectra, and the higher signal harmonics have a relative phase shift of almost 180. Claims of the Invention A device for an autotuning and selective four-pole network containing fa A detector, whose inputs are connected respectively to the input and output of the selective four, the pole and the output to the control input is selective to the four / pole through a control element, characterized in that, in order to increase the tuning accuracy, between the output of the quadrupole selective and control input A connected element includes a series-connected adder and an additional phase detector, the others whose inputs are connected respectively to the 1 input and the output of the selective four-port network. Sources of Information taken into account in the examination. US Patent No. 3588752, cl. N OZN 7/10, pub. 197il. at