CN212255476U - Sinusoidal signal phase difference traceability system - Google Patents
Sinusoidal signal phase difference traceability system Download PDFInfo
- Publication number
- CN212255476U CN212255476U CN202020911306.3U CN202020911306U CN212255476U CN 212255476 U CN212255476 U CN 212255476U CN 202020911306 U CN202020911306 U CN 202020911306U CN 212255476 U CN212255476 U CN 212255476U
- Authority
- CN
- China
- Prior art keywords
- phase
- signal
- signal output
- phase shifting
- output end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Phase Differences (AREA)
Abstract
The utility model provides a sinusoidal signal phase difference traceability system belongs to the precision measurement field. The sinusoidal signal phase difference traceability system comprises: a plurality of identical phase shifting modules; each phase shifting module comprises a signal input end and a signal output end; the signal input end of the first phase shifting module is the signal input end of the system, the signal output end of the first phase shifting module is connected with the signal input end of the second phase shifting module, the signal output end of the second phase shifting module is connected with the signal input end of the third phase shifting module, and so on, and the signal output end of the last phase shifting module is the signal output end of the system. Through the cascade connection of the phase shift modules, the phase of the output signal of the last module is close to that of the input signal of the first module, and then the zero-degree left-right phase can be used for orthogonal decomposition measurement, so that the tracing problem of the non-zero phase difference of the sinusoidal signals, particularly the tracing problem of the orthogonal phase, is solved, and the tracing of any phase difference is realized.
Description
Technical Field
The utility model belongs to the precision measurement field, concretely relates to sinusoidal signal phase difference traceability system.
Background
The phase difference tracing technology plays an important role in precision measurement, for example, in the electrical field, the tracing of power and loss requires phase difference tracing as support, and in the length field, the size measurement and the spatial positioning also depend on the accurate tracing of the phase difference of two signals.
The difference measurement technology can be applied to the accurate tracing of the phase difference of about 0 degree. And carrying out orthogonal decomposition on the vector difference of the two paths of signals with similar amplitudes and the reference signal through a multiplier, thus calculating the proportion difference and the phase difference of the two paths of signals.
However, for the case of a large phase difference, the vector difference between the two signals is already large, and especially in the case of a quadrature phase, the vector difference exceeds the signal itself, so the above-mentioned difference measurement technique is difficult to ensure the measurement accuracy of the signal after quadrature decomposition, and thus cannot be used for phase difference tracing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the difficult problem that exists among the above-mentioned prior art, provide a sinusoidal signal phase difference traceability system, can realize the traceability at arbitrary phase difference.
The utility model discloses a realize through following technical scheme:
the utility model provides a sinusoidal signal phase difference traceability system, sinusoidal signal phase difference traceability system includes: a plurality of identical phase shifting modules;
each phase shifting module comprises a signal input end and a signal output end; the signal input end of the first phase shifting module is the signal input end of the system, the signal output end of the first phase shifting module is connected with the signal input end of the second phase shifting module, the signal output end of the second phase shifting module is connected with the signal input end of the third phase shifting module, and so on, and the signal output end of the last phase shifting module is the signal output end of the system.
The system comprises N phase-shifting modules;
each phase shifting module can realize 360/N degree phase shifting;
each phase shifting module adopts a phase shifting circuit consisting of a resistor and a capacitor, or a phase shifting circuit consisting of a resistor and an inductor, or a phase shifting circuit consisting of a resistor, a capacitor and an operational amplifier, or a digital phase shifter.
Preferably, each of the phase shift modules includes: the circuit comprises a first operational amplifier, a second operational amplifier, a resistor R and a capacitor C;
the non-inverting input end of the first operational amplifier is the signal input end of the phase shifting module, the inverting input end of the first operational amplifier is connected with the signal output end of the first operational amplifier, the signal output end of the first operational amplifier is connected with one end of a resistor R, and the other end of the resistor R is connected with the non-inverting input end of the second operational amplifier and one end of a capacitor C; the signal output end of the second operational amplifier is connected with the inverting input end thereof, and the signal output end of the second operational amplifier is the signal output end of the phase shifting module; the other end of the capacitor C is grounded.
Further, the system includes a housing;
all the phase shifting modules are arranged in the inner cavity of the shell;
the shell is provided with a plurality of holes, and the signal input end of the system and the signal output end of the system are respectively led out from the holes.
Furthermore, the signal output end of each phase shifting module is led out from the hole on the shell and used as the signal output end of each middle angle.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a cascade of a plurality of modules that shift the phase for the last output signal that shifts the phase module is close with the first input signal phase place that shifts the phase module, then utilizes the zero degree about the phase place can orthogonal decomposition measure, has solved the problem of tracing to the source of sinusoidal signal non-zero degree phase difference, especially the problem of tracing to the source of quadrature phase, thereby has realized tracing to the source of arbitrary phase difference.
Drawings
FIG. 1 is a schematic diagram of a phase shifting module in an embodiment of the present invention;
FIG. 2 illustrates a phase shifting module testing and adjusting circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a sinusoidal signal phase difference tracing system in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the utility model discloses a phase difference based on two signals is the notion of the relative proportion of time difference and cycle, rather than an absolute quantity. The quadrature phase difference (ninety degrees) is defined as one quarter of a period (three hundred sixty degrees).
The utility model discloses sinusoidal signal phase difference traceability system includes: the phase shifting device comprises a plurality of identical phase shifting modules, a phase shifting module and a phase shifting module, wherein each phase shifting module can realize phase shifting and comprises a signal input end and a signal output end; the system comprises a plurality of phase shifting modules, wherein the phase shifting modules are connected in series to form the system, specifically, a signal input end of a first phase shifting module is a signal input end of the system, a signal output end of the first phase shifting module is connected with a signal input end of a second phase shifting module, a signal output end of the second phase shifting module is connected with a signal input end of a third phase shifting module, and so on, and a signal output end of a last phase shifting module is a signal output end of the system.
Further, the system comprises a shell, wherein all the phase shifting modules are arranged in an inner cavity of the shell; the shell is provided with a plurality of holes, and the signal input end of the system and the signal output end of the system respectively extend out of the holes, so that the system can be conveniently connected with an input signal outside the shell and the digital phase shifter to be calibrated respectively.
Furthermore, the signal output ends of the phase-shifting modules in the shell can be respectively led out from the holes on the shell to be used as the signal output ends of the middle angles.
The method for applying the system comprises the following steps:
(1) respectively setting N +1 phase shift modules from PS0 to PS1 to PSN;
(2) the PS1 to the PSN are adjusted to be phase-shifting modules with the same phase-shifting angle by utilizing the PS 0;
(3) PS1 to PSN are cascaded into the above system;
(4) tracing the system;
(5) calibrating the digital phase shifter to be calibrated by using the system;
(6) and generating any phase shifting angle by using the digital phase shifter, and tracing other phase shifting devices.
The operation of the step (2) comprises the following steps:
the following operations are respectively performed on the N phase shift modules from PS1 to PSN in sequence:
inputting one input signal into signal input ends of PS0 and PSi, i is 1,2, … …, N;
measuring the proportional difference and the phase difference of the output signal of the PS0 and the output signal of the PSi by using a difference measuring device;
the parameters of PSi are adjusted to minimize the phase difference between their output signals and the output signal of PS 0.
The operation of the step (3) comprises:
and taking the signal input end of the first phase shifting module as the signal input end of the system, connecting the signal output end of the first phase shifting module with the signal input end of the second phase shifting module, connecting the signal output end of the second phase shifting module with the signal input end of the third phase shifting module, and so on, and taking the signal output end of the Nth phase shifting module as the signal output end of the system.
The operation of the step (4) comprises the following steps:
obtaining the phase difference between the input signal and the output signal of the system by using a differential measuring device, and dividing the phase difference by N to obtain the phase difference of each phase shifting module for shifting the phase by 360/N degrees, namely realizing the tracing of the respective phase shifting of the N phase shifting modules by 360/N degrees;
m intermediate angle signal output ends are arranged, wherein M is N-1, j is 360/N degrees phase shift is realized at the jth intermediate angle signal output end, and j is 1,2, … … and M;
and (4) obtaining the phase difference of the jth intermediate angle signal output end by using the phase difference of 360/N degrees of phase shift of each jth phase shift module, namely realizing the source tracing of the jth intermediate angle, thereby completing the source tracing of the system.
The operation of the step (5) comprises the following steps:
taking j × 360/N degrees of the intermediate angle signal output end as a standard value;
generating a phase shift of j x 360/N degrees with a digital phase shifter to be calibrated;
and simultaneously inputting an output signal generated by the digital phase shifter to be calibrated and an output signal of the corresponding intermediate angle signal output end into the difference measuring device, and obtaining the phase difference between the output signal and the corresponding intermediate angle signal output end by using the difference measuring device, namely, the calibration of the digital phase shifter to be calibrated is realized.
The embodiment of the utility model is as follows:
the first embodiment is as follows:
all the phase shift modules in the system can adopt various existing devices capable of realizing phase shift, such as a phase shift circuit consisting of a resistor and a capacitor, or a phase shift circuit consisting of a resistor and an inductor, or a phase shift circuit consisting of a resistor, a capacitor and an operational amplifier, or a digital phase shifter and the like.
Example two:
preferably, as shown in fig. 1, each of the phase shift modules includes: two operational amplifiers (i.e., followers), a first operational amplifier OPA1 and a second operational amplifier OPA2, respectively, and a resistor R and a capacitor C. The concrete structure is as follows:
the non-inverting input end of the first operational amplifier OPA1 is a signal input end of the phase shift module and is connected with an input signal, the inverting input end of the first operational amplifier OPA1 is connected with a signal output end thereof, the signal output end of the first operational amplifier OPA1 is connected with one end of a resistor R, and the other end of the resistor R is connected with the non-inverting input end of the second operational amplifier OPA2 and one end of a capacitor C; the signal output end of the second operational amplifier OPA2 is connected with the inverting input end thereof, and the signal output end of the second operational amplifier OPA2 is the signal output end of the phase shift module; the other end of the capacitor C is grounded. The left-hand box in fig. 1 represents the signal input of the phase shift module, and the right-hand box represents the signal output of the phase shift module. The resistor R and the capacitor C in FIG. 1 both adopt an adjustable resistor and an adjustable capacitor.
Example three:
as shown in fig. 3, N is equal to 4 in this embodiment, that is, the sinusoidal signal phase difference tracing system includes four phase shift modules, which are respectively a first phase shift module PS1, a second phase shift module PS2, a third phase shift module PS3, and a fourth phase shift module PS4, a first operational amplifier in the first phase shift module PS1 is OPA11, a second operational amplifier is OPA12, a resistor is R1, a capacitor is C1, a first operational amplifier in the second phase shift module PS2 is OPA21, a second operational amplifier is OPA22, a resistor is R2, a capacitor is C2, and so on.
Each phase shifting module can realize phase shifting by ninety degrees, and four phase shifting modules are sequentially cascaded, namely, the signal output end of the previous phase shifting module is connected with the signal input end of the next phase shifting module, the signal input end of the first phase shifting module is used as the signal input end of the system, and the signal output end of the last phase shifting module is used as the signal output end of the system. Specifically, in fig. 3, a signal input terminal of PS1 is used as a signal input terminal of the system, a signal output terminal of PS1 is connected to a signal input terminal of PS2, a signal output terminal of PS2 is connected to a signal input terminal of PS3, a signal output terminal of PS3 is connected to a signal input terminal of PS4, and a signal output terminal of PS4 is used as a signal output terminal of the system.
Thus, the initial input signal ti (t) passes through the four phase shift modules to obtain an output signal to (t) with a phase difference close to three hundred and sixty degrees (zero degrees) from the initial input signal ti (t).
Example four:
further, in this embodiment, there are 3 intermediate angle output ends, as shown in fig. 3, the signal output ends of the first phase shift module PS1, the second phase shift module PS2, and the third phase shift module PS3 are respectively led out to be used as intermediate angle signal output ends TA, TB, and TC, where the phase difference between TA and TI is 90 °, the phase difference between TB and TI is 180 °, and the phase difference between TC and TI is 270 °, and then these output ports may be used to calibrate the corresponding phase of the digital phase shifter to be calibrated, for example, TB is used to calibrate whether the phase shift of the digital phase shifter to be calibrated by 180 degrees is accurate.
Example five:
also can be according to the utility model discloses a sixty degrees phase shift module of method design, it is specific, can be in the phase shift module of embodiment one, through the value of configuring different resistance R, electric capacity C, realize the required phase shift angle under required frequency. Meanwhile, six sixty-degree phase shift module cascades (similar to the connection manner in the third embodiment) are adopted to realize three-hundred sixty-degree phase shift instead of four ninety-degree phase shifters.
Other similar N360/N degree phase shift module cascades can be adopted to realize three hundred and sixty degree phase shift. Of course, as with the system formed by the four ninety-degree phase shift modules, the signal output end of each phase shift module may be led out to serve as the intermediate angle signal output end, and phase shift of a plurality of intermediate angles may be realized. And M intermediate angle signal output ports are arranged, namely M is equal to N-1, the j-th angle signal output port realizes j × 360/N degree phase shift, and j is equal to 1,2 and … … M.
And the one-hundred-eighty-degree phase shift can be realized by combining N phase shift modules in a cascade mode, and then the 360-degree phase shift is realized by connecting phase inverters.
Example six:
preferably, all the phase shift modules can be packaged in a shell, an opening is formed in the shell, and the signal input end and each signal output end extend out of the opening, so that input signals can be connected and output signals can be output conveniently. The outer thick black lines in fig. 3 (i.e., the lines between T0 and T1, T1 and TA, TA and TB, TB and TC) represent the enclosures that enclose the phase shifting modules.
Example seven:
the method for applying the system comprises the following steps:
step 1: respectively setting 5 phase-shifting modules shown in the second embodiment, namely PS0, PS1, PS2, PS3 and PS 4;
step 2: as shown in fig. 2, a signal is simultaneously input into a ninety-degree phase shift module PS0(5 phase shift modules are the same, and any one of them is selected as PS0) as a reference, and a debugged ninety-degree phase shift module PS1, where the phase difference between the output signals of PS0 and PS1 with respect to the input signal should be about ninety degrees, a difference measuring device in the prior art of difference measurement is used (an existing lock-in amplifier or an instrument with similar function can be used as the difference measuring device, and the difference measuring principle is that the existing lock-in principle is used, which is not described here again), the proportional difference and the phase difference between the two output signals of PS0 and PS1 are measured, and the device parameters of PS1 (the parameters of resistor R or capacitor C can be adjusted, and the adjusting method is that the existing adjusting method is used) are adjusted so that the phase difference between the output signal and the output signal of PS0 is the minimum;
and step 3: for PS2, PS3 and PS4, repeating step 2 in sequence, and performing measurement and adjustment similar to PS1 to achieve the purpose that the phase shift angles of the four phase shift modules of PS1, PS2, PS3 and PS4 are the same;
and 4, step 4: as shown in fig. 3, the four blocks PS1, PS2, PS3 and PS4 are cascaded to form the system, and the signal input terminal of the first phase shift block is used as the signal input terminal of the system, and the signal output terminal of the last phase shift block is used as the signal output terminal of the system. Thus, the initial input signal ti (t) passes through the four phase shift modules to obtain an output signal to (t) with a phase difference close to three hundred and sixty degrees (zero degrees) from the initial input signal ti (t).
The phase difference between the input signal ti (t) and the output signal to (t) is obtained by using a differential measuring device, and after the phase difference is obtained, the phase difference is divided by N (in this embodiment, N is 4) to obtain a phase difference (corresponding to j being 1) of respective ninety-degree phase shifts of four phase shift modules, so that tracing of respective ninety-degree phase shifts of the four phase shift modules of PS1, PS2, PS3 and PS4 can be realized, and tracing of one hundred eighty degrees and two hundred seventy degrees can be realized according to combinations, specifically, the error of the one hundred eighty degrees is an error of 2 times the ninety-degree phase shift (corresponding to j being 2), and the error of the two hundred seventy degrees is an error of 3 times the ninety-degree phase shift (corresponding to j being 3).
In fig. 3, TA, TB, and TC are respectively used as intermediate angle output terminals, the phase difference between TA and TI is 90 °, the phase difference between TB and TI is 180 °, the phase difference between TC and TI is 270 °, and the output ports are subsequently used to calibrate the corresponding phase shift angle of the digital phase shifter. The phase difference of each phase shifting module is obtained, the phase shifting modules are traced, then each phase shifting module is not required to be adjusted, the phase difference is used for correcting the measurement result in the subsequent use process, and device parameters of the phase shifting modules, such as parameters of resistors and capacitors, can be adjusted to correct the phase difference.
And 5: by utilizing the traced phase difference, the phase shifting precision of ninety degrees, one-hundred-eighty degrees and two-hundred-seventy degrees of the existing digital phase shifter to be calibrated, which can generate any phase shifting angle, can be calibrated.
The specific calibration method is as follows: because the accurate tracing to the source of phase difference about zero degree can be realized to current range finding device, consequently adopt the error that zero degree shifted phase of current range finding device direct measurement waited the digital phase shifter of calibration: two signals with zero phase difference (one is the original input signal, and the other is the signal after zero phase shift of the digital phase shifter) are input into a difference measuring device, and the difference measuring device is utilized to obtain the proportional difference and the phase difference, so that the zero phase shift error of the digital phase shifter to be calibrated is obtained.
Because the existing difference measuring device can not realize the accurate tracing of the phase difference of larger angles, the system is adopted to measure the phase shift errors of other angles of the digital phase shifter to be calibrated. Specifically, the phase of the output signal at the intermediate angle output end of the system is used as a standard value, the digital phase shifters to be calibrated are used for generating the phases respectively, the output signal generated by the digital phase shifter to be calibrated and the output signal at a certain intermediate angle output end are simultaneously input into the difference measuring device, so that the error of the digital phase shifter to be calibrated is obtained, the error comprises the proportional difference and the phase difference obtained by the difference measuring device, and the error is obtained, namely, the calibration is realized. Further, in practical application, the phase shift angle of the digital phase shifter to be calibrated may also be adjusted according to the error, so that the error value is minimum, or the phase shift angle of the digital phase shifter to be calibrated may not be adjusted, but only the error is directly used to correct the measurement result during subsequent tracing.
For example, if the error of the 90-degree phase shift of the digital phase shifter to be calibrated is to be calibrated, the digital phase shifter to be calibrated is operated to control the digital signal to generate an output signal having a 90-degree phase difference with the input signal through software, the input signal is input to the signal input terminal TI of the system shown in fig. 3, and then the output signal of the digital phase shifter to be calibrated and the output signal of the TA output port of the system shown in fig. 3 are input to the difference measuring device at the same time, so as to obtain the error of the digital phase shifter to be calibrated. Similarly, the error of the phase shift angle of 180 degrees, 270 degrees and the like can be calibrated by adopting the same process.
Because four representative angles equally divided in 360 degrees of a period are selected, the period is divided into four quadrants, and other angles are all in the four quadrants, after the four phase errors of the digital phase shifter to be calibrated, such as 0 °, 90 °, 180 °, and 270 °, the phase errors of other angles do not exceed the maximum error of the four errors.
And 6, after the calibration is completed, generating any phase shifting angle by using the digital phase shifter, and using the calibrated digital phase shifter as a standard for tracing other phase shifting devices, namely, generating a certain phase difference by using the calibrated digital phase shifter, generating the same phase difference by using other phase shifting devices, and respectively inputting output signals of the two phase shifting devices into a difference measuring device to obtain the phase difference of the two output signals, thereby realizing the tracing of any phase difference.
In this embodiment, the ninety-degree phase shift module shown in embodiment two is taken as an example to illustrate the steps of the method, and if the phase shift module with other phase shift angles is adopted, the method is similar to the method of this embodiment, and will not be described again
The utility model discloses a 4 above-mentioned 90 degrees cascades of phase shift module, can solve 90/180/270 degrees traceing to the source. 5 72-degree phase shifting modules can be adopted to solve the tracing of 72/144/… degrees, and the method can be used to solve the tracing of 360/N, so that the tracing of 0/90/180/270 degrees of the digital phase shifter is solved, the tracing of any angle of the digital phase shifter is also solved, and the tracing of any phase difference is realized.
The above technical solution is only an implementation manner of the present invention, and for those skilled in the art, based on the principle disclosed in the present invention, various modifications or variations can be easily made, and not limited to the structure described in the above specific embodiments of the present invention, so that the foregoing description is only preferred, and not restrictive.
Claims (7)
1. A sinusoidal signal phase difference traceability system is characterized in that: the sinusoidal signal phase difference traceability system comprises: a plurality of identical phase shifting modules;
each phase shifting module comprises a signal input end and a signal output end; the signal input end of the first phase shifting module is the signal input end of the system, the signal output end of the first phase shifting module is connected with the signal input end of the second phase shifting module, the signal output end of the second phase shifting module is connected with the signal input end of the third phase shifting module, and so on, and the signal output end of the last phase shifting module is the signal output end of the system.
2. The sinusoidal phase difference tracing system of claim 1, wherein: the system comprises N phase-shifting modules;
each phase shift module can realize 360/N degree phase shift.
3. The sinusoidal phase difference tracing system of claim 2, wherein: each phase shifting module adopts a phase shifting circuit consisting of a resistor and a capacitor, or a phase shifting circuit consisting of a resistor and an inductor, or a phase shifting circuit consisting of a resistor, a capacitor and an operational amplifier, or a digital phase shifter.
4. The sinusoidal phase difference tracing system of claim 2, wherein: each of the phase shift modules includes: the circuit comprises a first operational amplifier, a second operational amplifier, a resistor R and a capacitor C;
the non-inverting input end of the first operational amplifier is the signal input end of the phase shifting module, the inverting input end of the first operational amplifier is connected with the signal output end of the first operational amplifier, the signal output end of the first operational amplifier is connected with one end of a resistor R, and the other end of the resistor R is connected with the non-inverting input end of the second operational amplifier and one end of a capacitor C; the signal output end of the second operational amplifier is connected with the inverting input end thereof, and the signal output end of the second operational amplifier is the signal output end of the phase shifting module; the other end of the capacitor C is grounded.
5. The sinusoidal phase difference tracing system of claim 1, wherein: the system includes a housing;
all phase shifting modules are mounted in the internal cavity of the housing.
6. The sinusoidal phase difference tracing system of claim 5, wherein: the shell is provided with a plurality of holes, and the signal input end of the system and the signal output end of the system are respectively led out from the holes.
7. The sinusoidal phase difference tracing system of claim 6, wherein: and the signal output end of each phase shifting module is led out from a hole on the shell and is used as a signal output end of each middle angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020911306.3U CN212255476U (en) | 2020-05-26 | 2020-05-26 | Sinusoidal signal phase difference traceability system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020911306.3U CN212255476U (en) | 2020-05-26 | 2020-05-26 | Sinusoidal signal phase difference traceability system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212255476U true CN212255476U (en) | 2020-12-29 |
Family
ID=73976697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020911306.3U Active CN212255476U (en) | 2020-05-26 | 2020-05-26 | Sinusoidal signal phase difference traceability system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212255476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264877A (en) * | 2021-12-27 | 2022-04-01 | 中国电子科技集团公司第三十四研究所 | Sine wave phase difference accurate measurement circuit and measurement method thereof |
-
2020
- 2020-05-26 CN CN202020911306.3U patent/CN212255476U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264877A (en) * | 2021-12-27 | 2022-04-01 | 中国电子科技集团公司第三十四研究所 | Sine wave phase difference accurate measurement circuit and measurement method thereof |
| CN114264877B (en) * | 2021-12-27 | 2023-11-14 | 中国电子科技集团公司第三十四研究所 | Sine wave phase difference accurate measurement circuit and measurement method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6556930B2 (en) | Vector network analyzer | |
| CN107957542B (en) | Circuit for in-situ differential impedance balance error measurement and correction | |
| US8508241B2 (en) | Method and device for the calibration of network analyzers using a comb generator | |
| JP4547064B2 (en) | A / D converter and calibration device | |
| KR101407354B1 (en) | Compensating for harmonic distortion in an instrument channel | |
| CN101310498B (en) | Phase control device, and pulse pattern generator and error detector using the phase control device | |
| Rolfes et al. | Multiport method for the measurement of the scattering parameters of N-ports | |
| TWI423589B (en) | Apparatus for and method of generating a sinusoidal signal and method of manufacturing a semiconductor device | |
| JP2004301839A (en) | Calibration method for performing multiport measurement in semiconductor wafer | |
| US8126670B2 (en) | Method and device for calibrating a network analyzer for measuring at differential connections | |
| CN212255476U (en) | Sinusoidal signal phase difference traceability system | |
| CN112230191A (en) | Coupled real-time calibration multi-channel coherent signal simulation device and method | |
| CN111865331B (en) | Phase calibration method for MWC extended system transfer matrix | |
| US7768271B2 (en) | Method for calibration of a vectorial network analyzer having more than two ports | |
| CN111610367A (en) | Sinusoidal signal phase difference tracing system and method | |
| JP2006504960A (en) | How to measure the scattering parameters of a multiport device under test using a multiport network analyzer with a non-sinusoidal measurement signal | |
| CN113447873B (en) | Sampling oscilloscope complex frequency response calibration device and method | |
| CN215526371U (en) | Delay line time difference measuring device based on FPGA | |
| CN113702888B (en) | Digital alternating current comparator and calibration method | |
| CN211293080U (en) | LCR measuring device based on transformer lead compensation bridge | |
| CN112152623A (en) | System and method for testing analog-to-digital converter | |
| JPH0396870A (en) | Measuring instrument | |
| US7038465B2 (en) | System and method for calibrating balanced signals | |
| CN115792770B (en) | Method and system for acquiring inherent phase calibration data among channels of vector network analyzer | |
| CN113985243B (en) | Calibration method and device for high-precision operational amplifier test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |