SU112712A1 - Phase sensor for multiple frequencies - Google Patents

Description

In the known phase sensors for multiples of frequencies, intended for devices operating in multiply or dividing frequency, which are used to obtain the output voltage, a non-linear phase difference between the input signals of the input signal or fractional rational frequencies is usually used geometrically compounded stresses adjustable source of displacement.

A simplified sensor circuit is shown in FIG. one.

Here, 1 and 2 sources of the investigated stresses ,,;, cos to f - c Uz / ",. Cos (n (u / + E); 5 - nonlinear element; 4 - source; 1 to regul; n; shifting RC is the load from which the output voltage E is proportional to, proportional to the phase difference of the oscillations studied; 1H;

The voltages U and U2 are summed geometrically and arrive and; nonlinear element 3. Using the bias source 4, the position of the operating point of the nonlinear element and the cutoff angle are chosen so that the current element from the voltage circuit of the higher voltage frequency occurs at those times when the total amplitude of the input voltages is sufficient to unlock an item. In the circuit, included in the circuit of a nonlinear element, a nerve is excreted; the harmonics passing through it: .1pulso - ;, amplg.thu ;;, and which snake changes with the phase of the voltage of a higher frequency relative to some conditional point selected on the voltage curve of less than 1 frequency (zero or maximum). The variable nair P e with the frequency of the first harmonic is detected and used as the riaiipir-KcHiic simulator. By changing the phase angle between the voltages U i; l - changes the cut-off angle and the level of the control voltage.

A schematic diagram of the phase sensor is given {a. 2

Voltages of multiple frequencies U and Uz on coitures. ; C:: i LzCz, included in the grid circuit of Lamia Lr contours 1; C: to LoC allow adjustment of the operating point. Operating point ;; and the required angle

the cut-offs are selected by reglating the resistance Ri, which forms with Rz a divider connected to the constant-displacement source circuit EO. In the anode circuit of the lamp i, a loop is connected, tuned to the first harmonic of the anode current and inductively connected to the loop. The voltage taken from the circuit is rectified by detector D. The constant component of the rectified voltage is released on the load. This design, via a cathode repeater, Lg, is supplied to a measuring or control device connected at the output of the circuit.

The described phase sensor operates in a continuous generation mode and in a pulsed mode with a voltage higher frequency controlled while maintaining the constancy of the operating point.

Subject invention

Claims (3)

1. A phase sensor for multiple voltage frequencies, operating in a frequency multiplication or frequency division system, consisting of a nonlinear element, a device for geometrically combining the measured voltages and an adjustable source of bias, characterized in that, in order to measure the phase between the voltages A multiple of frequencies and receiving control voltage is used, a detector is applied, the circuits of which generate current pulses from a voltage of a higher frequency, and a voltage of a lower frequency is used as a reference voltage. 2. Phase sensor according to claim 1, characterized in that the source of negative bias provides the necessary cut-off angle on the nonlinear element after geometrically adding voltages of multiple frequencies and the ability to work in continuous generation mode and pulsed mode when manipulating the voltage of a higher frequency. 3. Phase sensor in PP. 1 and 2, that is, so that the adjustment of the operating point is made using output circuits L | C; and -N1b