SU613479A1 - High-frequency phase regulator - Google Patents

Description

(54) HIGH FREQUENCY PHASE REGULATOR

1, the first phase discriminator 2, the first functional voltage converter 3 and the adder 4, between the output of the controlled generator 1 and the other input of the adder 4 are connected in series the second phase discriminator 5 and the second functional voltage converter 6, and the other inputs of the first 2 and the second 5 phase discriminators are connected to the generator 7 of the reference signal, respectively, directly and through the phase shifter 8. Moreover, between the output of one of the phase discriminators 2 and the additional input of the adder 4 The comparison element 9 is switched on, to the other input of which is connected through an additional function converter 10 a voltage source AND a constant voltage.

The proposed device works as follows.

The signals of generators 1 and 7 arrive at the first 2 and second 5 phase discriminators, and the signal of the generator 7 enters the second phase discriminator 5 through the phase shifter 8. The output voltages of the first 2 and second 5 phase discriminators, proportional and coscp, respectively, pass through the first 3 and the second 6 functional voltage converters.

The output voltage of the second functional voltage converter

and cos p-cos Oh,

and the first functional voltage converter

f / 2: sintp-sin-,

where is the angle of rotation of the converter.

Then the voltage at the output of the adder 4 will be determined by the expression

f / 2-cos cp-cos O -} - sin 9-sin O - cos ((-7 i).

This voltage will be the control for the controlled generator 1. With constant initial detuning of the generators 7 and 1 in synchronism mode, the voltage on the adder 4 is U-S Const, hence the difference Ф-ijj Const.

Thus, by changing the position of the transducer engine by an angle φ, we obtain changes in the phase difference of the generators 1 and 7 by the value φ).

In the presence of a phase shift introduced by the phase shifter 8, setting the phase difference between the generator lines 1 and 7 is also accompanied by errors.

Suppose that phase shifter 8 introduces a phase shift. Practically a in

The frequency range has a magnitude of the order of 2-5 °. In this case, the output voltage of the adder 4 can be expressed by the formula

f / s cos p cos f 4- sin (p ± A) sin O,

in view of the smallness of D after conversion, we have L / S cos (a - 0) ± cos p sin.

In the stationary relash phase locked loop system, the condition

cos; (o - C) ± coscp-sinOD O

It follows that the adjustment of the difference

The phases occur with a degree of dependence depending on the error of the installation of the D phase zla / 2. To reduce this error, the third input of the adder 4 is supplied with the output voltage of the reference element 9. The comparison circuit compares the established phase difference with a given angle 1 (3. If there is an error, the output voltage of the phase discriminator 2 SoSf will not be equal to the exemplary voltage SoSf, which is formed at the output of the additional functional voltage converter 10 from the constant voltage source 11 Leading from the output of the comparison element 9 affects the initial phase of the controlled

generator 1 in such a way that, in steady state, the equality φ g) ± a is achieved, where a is the phase angle, determined by the degree of static used in the high-frequency phase-shifter of the phase-locked loop system.

The error of setting the phase angle when using the proposed phase regulator has a value of one, two orders of magnitude smaller compared to the accuracy of the known

devices with equal values of the phase shift installation error l / 2.

Claims (2)

1. USSR author's certificate L 456347, cl. P OZV 3/04, 1974. 2. The patent of France No. 2071349, cl. N OZV 3/00, 1971.