SU1241147A1 - Phase calibrator - Google Patents

Abstract

The invention relates to a phase-measuring technique and makes it possible to increase the measurement accuracy. The device contains a reference oscillator 1, a control divider 2 frequencies, a control block 3, a phase detector 6, a mixer 7, a controlled oscillator 8, dividers 4, 9 ifipt frequencies, 5 and 12. Introduction and device arrangement of a frequency shift block 10, divider 11 frequencies and the formation of new connections between the elements of the device made it possible to reduce the discrete phase shift without changing the frequencies of the output signals of the reference oscillator. 1 yl. § (About 4 vl

Description

The invention relates to a phase-measuring technique.

The aim of the invention is to improve the accuracy by reducing the discrete value of the specified phase shift without changing the frequencies of the output signals and the master oscillator.

The drawing shows the scheme of the proposed Phase Calibrator.

The phase calibrator contains a reference oscillator 1, a controlled frequency divider 2, a control unit 3, a first frequency divider 4, flash | 5, phase detector 6, mixer 7, controlled oscillator 8, second frequency divider 9, frequency shift unit 10, third frequency divider 11, and php 12.

The master oscillator 1 is connected to a controlled frequency divider 2, which is connected to the control unit 3 and one of the inputs of the phase detector 6. In addition, the master oscillator 1 is connected to one of the inputs of the mixer 7, to the input of the first frequency divider 4 and to the input of block 10 frequency shift. The output of the 4 frequency divider is connected to the filter 5. The output of the controlled generator .8 is connected to the second input of the mixer 7, the output of which is connected to the second input of the phase detector 6. The output of the phase detector 6 is connected to the input of the controlled generator 8. The output of the controlled generator 8 is connected to the second frequency divider 9, the output of which is connected to the frequency shift unit 10. The output block 10 frequency shift is connected to the third delimiter 11, and the output of the divider 11 is connected to the filter 12.

Phase distributor works as follows.

The voltage with frequency f with the output of the master oscillator 1 is fed to

the inputs of dividers 2 and 4 frequencies and mixtures-4i i can be taken calibrator. Phase F1-4,

which has a definable phase shift of 30 MHz at a frequency of 10 MHz. The proposed device at a frequency of 10 MHz with fg 120 MHz and N 12 realizes the discretization of the specified phase shift, i.e. discrete decreases 120 times.

body 7, the second input of which receives a signal with a frequency from the output of the controlled oscillator 8. At the output of the mixer 7 there is an intermediate frequency signal, p fg -ffc, which receives the first input of the phase detector 6. The second input of the phase detector 6 is fed signal with frequency f / N + 1 from the output of controlled divider 2 frequency. The controlled voltage from the output of the phase detector 6 is fed to the input of the controlled oscillator 8, providing a ratio of clockwise and

acquisitions.

S5

A phase calibrator containing two filters, the outputs of which are the outputs of the phase calibrator, the reference generator and controlled generator 1 and 8 are equal to

Lor

G N + 1

(ABOUT

From the output of the divider 4 frequency master oscillator signal is fed to the filter 5, which forms a harmonic

voltage f / N + 1.

This voltage is applied to the reference output of the phase calibrator.

A signal with a frequency of f.

you

the course of the controlled generator 8 is fed to the input of the second divider 9 hour. and then to the first input of the frequency shift block 10, which is made on the basis of the PLL system by secondary beats. The second input of the frequency shift block 10 receives a signal from the output of the reference oscillator 1. At the frequency shift output 10, a signal is generated with the frequency fg - which to the third divider 11, and then to the filter 12, which forms a harmonic voltage with the frequency

where N is the coefficient of division of the divisor 11 ..

In this case, the phase of the voltage at the output of the filter 12 is changed discretely by the value UCf BdO / N (N + 1) when the button of the control unit 3 is pressed once.

Thus, the proposed device allows N to unnumbered a discretely specified phase shift, not changing the frequency ratio with respect to the prototype; For basic obf about rmu l and and

acquisitions.

S5

A phase calibrator containing two filters, the outputs of which are the outputs of the phase calibrator, the reference filter 312411474

a non-switch connected by an output from the input-output signals and a reference oscillator of a controlled frequency divider, a .tor, a serial input of the second input of which is connected to a control unit connected to a block but a frequency shift controller, the first frequency divider and the third frequency divider , the output of the mixer and the mixer, the output of which is connected to the input of the second cut in series connected phase filters, while the output of the reference gaseous detector and the equalizer of the generator is connected to the input of the torus unit connected to its second input shift offset oy, the second input of which is the second frequency divider input, is connected to the output of the second divisor by the fact that, 10l frequency, the output of the controlled divisor, in order to improve the accuracy of the frequency counter, with the second input f - decreasing the discrete value of the specified, phase de-vector, and - output of the first de-shift - without changing the frequency of the frequency detector - with the first filter.

Claims (1)

Claim S5 A phase calibrator containing two filters, the outputs of which are the outputs of the phase calibrator, a reference gerator connected to the output of the inputs of the controlled frequency divider, the second input of which is connected to the control unit, the first frequency divider and mixer, the output of which is connected in series through a phase the detector and the controlled generator are connected to its second input and the input of the second frequency divider, characterized in that, with the aim of increasing accuracy by reducing the discrete set, phase shift without changing the frequencies of the output signals and the reference oscillator, a frequency shift unit and a third frequency divider are introduced into it, the output of which is connected to the input of the second filter, while the output of the reference generator is connected to the input of the frequency shift unit, the second input of which is connected to the output of the second frequency divider , the output of the controlled frequency divider is with the second input of the phase detector, and the output of the first frequency divider is with the first filter.