SU408236A1 - In P - Google Patents

Description

The invention relates to a phase-measuring technique.

In the known phase-shifting devices operating on the principle of the time delay of the phase-variable signal with respect to the reference signal, for example, on non-spanning circuits, there is no continuous phase advance in the phase-variable channel.

The purpose of the invention is the ability to obtain a continuous sequence of pulses with a continuous onset of phase shift.

This is achieved by connecting to the node a time delay of the feedback circuit that changes the time delay value of the phase-variable channel in time with the appearance of a pulse at the output of the scaling circuit.

The drawing shows a diagram of the proposed device.

The device includes a reference period meter and a phase-variable channel. The period meter consists of a driver 1, a switch 2 connected to an oscillator 3, a frequency divider 4, a switch 5 and a counter 6. The alternating channel includes a switch 7 connected in series to the oscillator 3, a frequency divider 8, a comparison circuit 9, a counter 10, a circuit 11 comparison, reset circuit 12. The feedback is initiated by coupling the output of the comparison circuit 9 to the 4-frequency divider.

The scheme works as follows.

In the initial state, all counters are zeroed, the keys are locked. From the start button, the automation unit 13 prepares the driver / for the work, the key 3 and opens the key

5. With the arrival of the reference voltage with the frequency fon, the shaper 1 selects the period Top from the input frequency and for the time Hop opens the key 2, which through the divider 4 frequencies and the key 5 passes into the counter 6 a packet of high-frequency pulses from the autogenerator 3. Upon completion of the control shaper pulse generator / keys 2 and 5 are closed. At this point, the calculation of the value of the input signal period is completed.

With the opening of the key 7, the phase-variable channel comes into operation. The counting frequency from the auto-oscillator 5 through the switch 7, the frequency divider 8 and the comparison circuit 9 enters the counter 10. When the readings of the counters 6 and 10 are compared, the circuit // comparison will operate and the reset circuit 12 to zero, which will reset the readings of the counter 10, after which the process of filling the counter 10 will begin again, again reset its readings when compared with the readings of the counter

6, etc.

The oncoming time delay is obtained using a frequency divider 8, a comparison circuit 9 and a frequency divider 4, the other input of which is connected to the output of the comparison circuit 9. With equal readings of frequency dividers 4 and 9, a comparison circuit 9 is triggered, which gives a pulse to counters 10 and to frequency divider 4 inputs. Since the counter of the divider 4 frequency is shifted by one unit, the new pulse from the output of the comparison circuit 9 shows a time shift different by one unit of the divider's division ratio with respect to the previous time interval of the output pulse from the comparison circuit 9.

Subject invention

A circular phase shifter containing a phase rotational voltage period measurement channel consisting of a serially connected driver, a key connected to an auto generator, a frequency divider, a second key and a counter, characterized in that, in order to continuously rotate the phase of the input voltage, a phase variable channel is introduced consisting of a series-connected key, a frequency divider, a comparison circuit, and a second counter, the second input and the output of the comparison circuit being connected to the frequency divider of the period measurement channel, the second tchik associated with the second comparison circuit, the output of which through a reset circuit connected to the output device, and a second counter, a second input of the same comparator circuit connected to the counter channel measurement period.