CN110988464A - Calibration method and system for improving signal source precision - Google Patents
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Abstract
The invention provides a calibration method and a system for improving the precision of a signal source, wherein the method comprises the following steps: adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point; acquiring the output amplitude of the current frequency calibration point, and calculating the gain adjustment coefficient of the current frequency calibration point and the ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of the previous frequency calibration point; calculating gain coefficient K of current frequency calibration pointn：Kn＝Kn’*Kn‑1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn‑1The gain factor for the last frequency calibration point. The present disclosure relates to signal generator calibration, and more particularly, to a calibration method and system for improving signal source accuracy. The method of the invention can compensate the gain caused by amplitude-frequency response, so that the output amplitude of the signal source is closer to the amplitude required by a user.
Description
Technical Field
The invention relates to signal generator calibration, in particular to a calibration method and a system for improving signal source precision.
Background
In the signal source equipment used at present, especially at high frequency, the output power of the signal source changes monotonically with the frequency increase, i.e. the output amplitude also changes monotonically, as shown in fig. 1, which is a frequency-power diagram of an uncalibrated high-frequency signal source. But for the user the output amplitude should be equal to the set amplitude. Therefore, the amplitude gain (i.e. flatness) caused by the amplitude-frequency response is compensated for by calibration. Flatness refers to the gain of the output signal with amplitude varying with frequency when a signal source inputs a fixed amplitude.
The currently common calibration principle: along with the increase of the frequency, the increased amplitude is equal to the attenuated amplitude by increasing the internal output amplitude of the signal source, so that the output amplitude value is the set amplitude value. The calibration method used at present is to set the input amplitude value inside the signal source to be constant to obtain the compensation parameter of each calibration point, so as to calculate the input amplitude value of the calibration point.
In the practical application process, the following technical problems are found in the prior art:
due to the influence of analog devices and filters, the amplitude-frequency response curve has the condition that the higher the frequency is, the more the amplitude is reduced, so the amplitude-frequency response curve function is not a linear function, and therefore, the difference between the compensation coefficient obtained by the method and the actual compensation coefficient is increased along with the increase of the frequency, so that the condition that the output amplitude is greatly different from the ideal amplitude under the condition of the higher frequency even if the signal generator is calibrated.
Disclosure of Invention
The invention aims to provide a calibration method and a calibration system for improving the precision of a signal source, so as to compensate gain caused by amplitude-frequency response and enable the output amplitude of the signal source to be closer to the amplitude required by a user.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides a calibration method for improving signal source precision, including:
adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point;
acquiring the output amplitude of the current frequency calibration point, and calculating the gain adjustment coefficient of the current frequency calibration point and the ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of the previous frequency calibration point;
calculating gain coefficient K of current frequency calibration pointn：
Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
On the other hand, an embodiment of the present invention provides a calibration system for improving signal source accuracy, including:
the setting module is used for adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point;
the adjusting module is used for acquiring the output amplitude of the current frequency calibration point and calculating the gain adjusting coefficient of the current frequency calibration point and the ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of the previous frequency calibration point;
a compensation module for calculating the gain coefficient K of the current frequency calibration pointn：
Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
The technical scheme has the following technical effects: during calibration, the output amplitude of the previous frequency calibration point is adjusted to be the ideal output amplitude of the previous frequency calibration point, namely, the signal input amplitude of the current calibration point is adjusted to be the input amplitude of the previous calibration point, so that a gain adjustment coefficient and a gain coefficient of the previous calibration point are introduced, the gain coefficient of the current calibration point is closer to an ideal value, and the output value of the signal source after calibration is closer to the ideal output amplitude, so that the output precision of the signal source is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a frequency-power diagram of an uncalibrated high frequency signal source;
FIG. 2 is a flow chart of a calibration method for improving signal source accuracy in one embodiment of the present invention;
FIG. 3 is a flow chart of another calibration method for improving the accuracy of a signal source according to an embodiment of the present invention;
FIG. 4 is a calibration system for improving the accuracy of a signal source in one embodiment of the present invention;
FIG. 5 is another exemplary calibration system for improving the accuracy of a signal source in accordance with an embodiment of the present invention;
FIG. 6 is a schematic frequency-amplitude diagram of a high frequency signal source calibrated using a prior art technique;
FIG. 7 is a flow chart of the present invention for calibrating a high frequency signal source;
FIG. 8 is a schematic frequency-amplitude diagram of a high frequency signal source calibrated by the method of the present invention;
fig. 9 is a frequency-power diagram of a high frequency signal source employing the calibration algorithm of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, a flowchart of a calibration method for improving signal source accuracy in an embodiment of the present invention includes:
step 101, adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point;
102, acquiring an output amplitude of a current frequency calibration point, and calculating a gain adjustment coefficient of the current frequency calibration point and an ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of a previous frequency calibration point;
step 103, calculating the gain coefficient K of the current frequency calibration pointn：
Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
Preferably, the frequency of the current frequency calibration point is higher than the frequency of the last frequency calibration point, and the two calibration points are adjacent.
As shown in the flowchart of the calibration method for improving the signal source accuracy in fig. 3, compared with the above embodiment, the calibration method preferably further includes a step 104 of, on the power curve before calibration, infinitely fitting a curve between points corresponding to the current frequency calibration point and the previous frequency calibration point to a straight line passing through the two points.
Preferably, the gain adjustment coefficient K of the current frequency calibration pointn' is calculated by the following formula: kn’＝Vn_out/Vn-1_out_standard(ii) a Wherein, Vn_outThe output amplitude of the current frequency calibration point; vn-1_out_standardThe ideal output amplitude for the last frequency calibration point.
Preferably, the gain factor K of the 1 st frequency calibration point1Calculated by the following formula: k1＝V1_out/V1_out_standard(ii) a Wherein, V1_outAn output amplitude value of a first frequency calibration point; v1_out_standardThe ideal output amplitude for the first frequency calibration point.
As shown in fig. 4, a calibration system for improving the accuracy of a signal source in the embodiment of the present invention includes:
a setting module 201, configured to adjust an output amplitude of a previous frequency calibration point to an ideal output amplitude of the previous frequency calibration point;
the adjusting module 202 is configured to obtain an output amplitude of a current frequency calibration point, and calculate a gain adjustment coefficient of the current frequency calibration point and an ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of a previous frequency calibration point;
a compensation module 203 for calculating a gain factor K of the current frequency calibration pointn：Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
Preferably, the system comprises in particular: the frequency of the current frequency calibration point is higher than the frequency of the last frequency calibration point, and the two calibration points are adjacent.
Preferably, the calibration system for improving the accuracy of the signal source as shown in fig. 5 further includes a calibration point selection module 204, configured to select the calibration point according to the following criteria: on the power curve before calibration, the curve between any two adjacent calibration points fits a straight line passing through the two points indefinitely.
Preferably, the compensation module 202 of the system further comprises: a first gain coefficient calculation submodule for calculating a gain adjustment coefficient K of the current frequency calibration point by the following formulan’：Kn’＝Vn_out/Vn-1_out_standard(ii) a Wherein, Vn_outThe output amplitude of the current frequency calibration point; vn-1_out_standardThe ideal output amplitude for the last frequency calibration point.
Preferably, the compensation module 202 of the system further comprises: a second gain coefficient calculation submodule for calculating a gain coefficient K of the 1 st frequency calibration point by the following formula1：K1＝V1_out/V1_out_standard(ii) a Wherein, V1_outAn output amplitude value of a first frequency calibration point; v1_out_standardThe ideal output amplitude for the first frequency calibration point.
The technical scheme of the embodiment of the invention has the following technical effects: during calibration, the output amplitude of the previous frequency calibration point is adjusted to be the ideal output amplitude of the previous frequency calibration point, namely, the signal input amplitude of the current calibration point is adjusted to be the input amplitude of the previous calibration point, so that a gain adjustment coefficient and a gain coefficient of the previous calibration point are introduced, the gain coefficient of the current calibration point is closer to an ideal value, and the output value of the signal source after calibration is closer to the ideal output amplitude, so that the output precision of the signal source is improved.
The above technical solutions of the embodiments of the present invention are described in detail below with reference to the application and implementation.
Because the signal source has amplitude-frequency response, the output amplitude is smaller and smaller along with the increase of the frequency, so the signal source needs to be calibrated, and the output amplitude is the ideal output amplitude. In the calibration method, the output amplitude of the previous frequency calibration point is adjusted to be the ideal output amplitude of the previous frequency calibration point, and the gain adjustment coefficient and the gain coefficient of the previous frequency calibration point are introduced, so that the output amplitude of the signal source is closer to the ideal output amplitude.
A calibration method for improving the accuracy of a signal source comprises the following steps: adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point; acquiring the output amplitude of the current frequency calibration point, and calculating the gain adjustment coefficient of the current frequency calibration point and the ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of the previous frequency calibration point; calculating gain coefficient K of current frequency calibration pointn：Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
The frequency of 100KHz is set as a signal source and a high-frequency and medium-frequency demarcation point, and when the high-frequency signal source is calibrated, the output amplitude of 100KHz is firstly ensured to be an ideal output amplitude.
Fig. 6 is a schematic frequency-amplitude diagram of a high frequency signal source calibrated by the prior art. As shown in the figure:
selecting a frequency f during calibration1、f2And at calibration point of f1、f2Frequency ofCalibration points for fx. Defining the gain coefficient of the calibration point as K: k is Vn/V100kIn which V isnOutput amplitude, V, for calibration points100kThe ideal output amplitude is the frequency of 100 KHz. Then f1、fx、f2The corresponding gain coefficients are respectively K1＝V1/V100k、Kx＝Vx/V100k、K2＝V2/V100kCalculating the input amplitude of the signal source at three calibration points by the gain coefficient, wherein the input amplitude is V1_in＝V1/K1、Vx_in_＝Vx/Kx、V2_in＝V2/K2(ii) a Connecting frequencies f to the power-amplitude curve in a straight line1、f2All points, by geometric relationship (K)x–K1)/(K2–K1)＝(fx–f1)/(f2–f1) To obtain a gain coefficient KxFinally by a gain factor KxCalculating to obtain the calibrated frequency fxThe signal source inputs the amplitude.
Fig. 7 is a flow chart of the present invention for calibrating a high frequency signal source, the calibration process is as follows:
301, setting the frequency of the signal source to be 100KHz, and outputting the amplitude to be an ideal amplitude V100k；
Step 302, recording the input amplitude of the signal source when the frequency is 100KHz to obtain the ideal output amplitude.
In the calibration method of the invention, different frequency points of the signal source are selected according to the frequency from low to high. Preferably, on the power curve before calibration, a curve between points corresponding to the current frequency calibration point and the last frequency calibration point fits a straight line passing through the two points indefinitely.
Before calibration, a power meter is used for measuring and recording output power corresponding to different frequencies of the sine wave function signal generator, and a frequency-power curve graph is manufactured. When the calibration point is selected, on the frequency-power curve, the difference between the power at the middle point of the straight line between the current calibration point and the previous calibration point and the actual power is smaller than or equal to 1/3 of the error specified by the output power of the signal source, wherein the specified error is the difference between the actual output power and the ideal output power of the signal source.
Firstly, calibrating a 1 st calibration point, wherein the gain coefficient K of the 1 st frequency calibration point1Calculated by the following formula: k1＝V1_out/V1_out_standard(ii) a Wherein, V1_outThe output amplitude of the 1 st frequency calibration point; v1_out_standardThe ideal output amplitude for the first frequency calibration point. The procedure for calibrating the 1 st calibration point is as follows:
step 303, selecting a 1 st calibration point on the frequency-power curve;
step 304, setting a signal source to select a frequency for the 1 st calibration point;
305, adjusting the input amplitude of the signal source to be 100KHz to obtain the input amplitude when the ideal output amplitude is obtained;
Step 307, calculating the calibration point through the gain coefficient to obtain the input amplitude V of the signal source when the ideal output amplitude is obtained1_in：V1_in＝V100k/K1。
Preferably, the calibration is performed in the order of frequency from low to high, so that the frequency of the current frequency calibration point is higher than the frequency of the last frequency calibration point, and the two calibration points are adjacent.
Calibrating a 2 nd calibration point having a frequency higher than the 1 st calibration point, the process of calibrating the 2 nd calibration point being as follows:
step 303, selecting a 2 nd calibration point on the frequency-power curve;
step 304, setting the signal source to select the frequency for the 2 nd calibration point;
step 305, adjusting the input amplitude of the signal source to the 1 st calibration point to obtain the input amplitude V when the ideal output amplitude is obtained1_in＝V100k/K1Is named as V2_tempNamely:
V2_temp＝V100k/K1(1)
by outputting amplitude V from signal source2_outCalculating gain adjustment coefficient K of the 2 nd calibration point2’：
K2’＝V2_out/V100k, (2)
Setting the 2 nd calibration point to obtain the ideal output amplitude value, the input amplitude value of the signal source is V2_inThe formula is as follows:
V2_in＝V2_temp/K2’， (3)
in addition:
V2_in＝V00k/K2(4)
the gain coefficient K of the 2 nd calibration point is obtained by the formulas (1) to (4)2：
K2＝K2’*K1(5)
Step 307, calculating the point through the gain coefficient to obtain the ideal output amplitude value, wherein the input amplitude value of the signal source is V2_in：
V2_in＝V100k/K2。
Calibrating a 3 rd calibration point having a higher frequency than the 2 nd calibration point, the 3 rd calibration point being calibrated as follows:
step 303, selecting a 3 rd calibration point on the frequency-power curve, wherein the frequency of the 3 rd calibration point is higher than that of the 2 nd calibration point;
step 304, setting the signal source to select the frequency for the 3 rd calibration point;
step 305, adjusting the input amplitude of the signal source to the input amplitude V of the signal source when the 2 nd calibration point obtains the ideal output amplitude2_in＝V100k/K2Is named as V3_tempNamely:
V3_temp＝V100k/K2， (6)
by outputting amplitude V from signal source3_outCalculating gain adjustment coefficient K of the 3 rd calibration point3’：
K3’＝V3_out/V100k, (6)
Setting the 3 rd calibration point to obtain the ideal output amplitude value, the input amplitude value of the signal source is V3_inThe formula is as follows:
V3_in＝V3_temp/K3’ (7)
in addition:
V3_in＝V100k/K3(8)
the gain coefficient K of the 3 rd calibration point is obtained by the formulas (5) to (8)3：
K3＝K3’*K2
307, calculating the 3 rd calibration point through the gain coefficient to obtain the signal source input amplitude value V when the ideal output amplitude value is obtained3_in：
V3_in＝V100k/K3。
After the calibration of the 3 rd calibration point is completed, the subsequent calibration points are calibrated by performing steps 303 and 307 until the end. Sequentially selecting a current frequency calibration point with a frequency higher than the last frequency calibration point on the power curve: and (3) calibrating the 4 th calibration point, the 5 th calibration point, … … and the nth calibration point (wherein n is more than or equal to 2), calibrating according to the sequence of frequency from low to high, obtaining the input amplitude of an ideal output amplitude by adjusting the input amplitude of the signal source to the previous calibration point, recording the output amplitude at the moment, calculating the gain coefficient of the current calibration point and the input amplitude when the ideal output amplitude is obtained, and completing the calibration of all the calibration points.
Preferably, the gain adjustment coefficient K of the current frequency calibration pointn' is calculated by the following formula: kn’＝Vn_out/Vn-1_out_standard(ii) a Wherein, Vn_outThe output amplitude of the current frequency calibration point; vn-1_out_standardThe ideal output amplitude for the last frequency calibration point.
Calculating to obtain the current frequency through the gain adjustment coefficientGain factor K of calibration pointn：Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
The process of calibrating the nth calibration point can be analogized from the process of calibrating the 2 nd calibration point and the 3 rd calibration point, wherein n is more than or equal to 2, and the following steps are carried out:
step 303, selecting an nth calibration point on the frequency-power curve, wherein the frequency of the nth calibration point is higher than that of the nth-1 calibration point;
step 304, setting the signal source to select frequency for the nth calibration point;
step 305, adjusting the input amplitude of the signal source to the n-1 th calibration point to obtain the input amplitude V of the signal source when the ideal output amplitude is obtainedn-1_temp＝V100k/Kn_1Is named as Vn_tempNamely:
Vn_temp＝V100k/Kn_1， (9)
by outputting amplitude V from signal sourcen_outCalculating gain adjustment coefficient K of nth calibration pointn’：
Kn’＝Vn_out/V100k； (10)
Setting the n-th calibration point to obtain the ideal output amplitude value, the input amplitude value of the signal source is Vn_inThe formula is as follows:
Vn_in＝Vn_temp/Kn’ (11)
in addition:
Vn_in＝V100k/K3(12)
obtaining the nth standard point gain coefficient K through formulas (9) to (12)n：
Kn＝Kn’*Kn-1
Step 307, calculating the nth calibration point through the gain coefficient to obtain the input amplitude value V of the signal source when the ideal output amplitude value is obtainedn_in：Vn_in＝V100k/Kn。
The frequency-amplitude diagram of the high-frequency signal source calibrated by the method of the invention is shown in FIG. 8.
In the calibration method, the signal source input amplitude value is obtained when the ideal output amplitude value is obtained by adjusting the signal source input amplitude value of the current calibration point to be the previous calibration point, so that a gain adjustment coefficient and a gain coefficient of the previous calibration point are introduced, the gain coefficient of the current calibration point is closer to the ideal value, and the calibration precision of the signal source is improved. The gain coefficient of the calibration point becomes smaller and smaller as the frequency increases, so that the actual input amplitude of the calibrated signal source is larger when the frequency is higher, and the actual output amplitude is closer to the ideal output amplitude. Fig. 9 is a schematic frequency-power diagram of a high-frequency signal source using the calibration algorithm of the present invention, where as the frequency increases, the input amplitude of the signal source increases, and then the power output of the signal source also increases, so that the output amplitude is the ideal output amplitude.
The embodiment of the present invention provides a calibration system for improving the accuracy of a signal source, which can implement the above-mentioned method embodiment, and for specific function implementation, reference is made to the description of the method embodiment, which is not repeated herein.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
Claims (10)
1. A calibration method for improving the accuracy of a signal source, comprising:
adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point;
acquiring the output amplitude of the current frequency calibration point, and calculating the gain adjustment coefficient of the current frequency calibration point and the ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of the previous frequency calibration point;
calculating a current frequency calibration pointGain coefficient K ofn：
Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
2. The method of claim 1, comprising:
the frequency of the current frequency calibration point is higher than the frequency of the last frequency calibration point, and the two calibration points are adjacent.
3. The method of claim 1, comprising:
and on the power curve before calibration, a curve between the current frequency calibration point and the point corresponding to the last frequency calibration point is infinitely attached to a straight line passing through the two points.
4. The method of claim 1 wherein the gain adjustment factor K for the current frequency calibration pointn' is calculated by the following formula:
Kn’＝Vn_out/Vn-1_out_standard(ii) a Wherein, Vn_outThe output amplitude of the current frequency calibration point; vn-1_out_standardThe ideal output amplitude for the last frequency calibration point.
5. The method of claim 1 wherein the gain factor K for the 1 st frequency calibration point1Calculated by the following formula:
K1＝V1_out/V1_out_standard(ii) a Wherein, V1_outAn output amplitude value of a first frequency calibration point; v1_out_standardThe ideal output amplitude for the first frequency calibration point.
6. A calibration system for improving the accuracy of a signal source, comprising:
the setting module is used for adjusting the output amplitude of the previous frequency calibration point to be the ideal output amplitude of the previous frequency calibration point;
the adjusting module is used for acquiring the output amplitude of the current frequency calibration point and calculating the gain adjusting coefficient of the current frequency calibration point and the ideal output amplitude of the current frequency calibration point according to the output amplitude of the current frequency calibration point and the ideal output amplitude of the previous frequency calibration point;
a compensation module for calculating the gain coefficient K of the current frequency calibration pointn：
Kn＝Kn’*Kn-1(ii) a n is more than or equal to 2; wherein, Kn' is the gain adjustment factor for the current frequency calibration point; kn-1The gain factor for the last frequency calibration point.
7. The system of claim 6, comprising:
the frequency of the current frequency calibration point is higher than the frequency of the last frequency calibration point, and the two calibration points are adjacent.
8. The system of claim 6, comprising:
a calibration point selection module for selecting calibration points by the following criteria:
on the power curve before calibration, the curve between any two adjacent calibration points fits a straight line passing through the two points indefinitely.
9. The system of claim 6, wherein the compensation module further comprises:
a first gain coefficient calculation submodule for calculating a gain adjustment coefficient K of the current frequency calibration point by the following formulan’：
Kn’＝Vn_out/Vn-1_out_standard(ii) a Wherein, Vn_outThe output amplitude of the current frequency calibration point; vn-1_out_standardThe ideal output amplitude for the last frequency calibration point.
10. The system of claim 6, wherein the compensation module further comprises:
a second gain coefficient calculation submodule for calculating a gain coefficient K of the 1 st frequency calibration point by the following formula1：
K1＝V1_out/V1_out_standard(ii) a Wherein, V1_outAn output amplitude value of a first frequency calibration point; v1_out_standardThe ideal output amplitude for the first frequency calibration point.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441232A (en) * | 2008-12-25 | 2009-05-27 | 中南大学 | Time base frequency real time calibration frequency measuring method and apparatus |
| CN102025430A (en) * | 2010-11-19 | 2011-04-20 | 中兴通讯股份有限公司 | Closed loop-based automatic calibration method and equipment |
| US20120185199A1 (en) * | 2011-01-14 | 2012-07-19 | Moran Tamir E | User-Invoked Calibration of Modular System Using an Embedded Calibration Signal Generator |
| CN103178779A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Signal generator with amplitude compensation function and method thereof |
| JP2014103671A (en) * | 2012-11-20 | 2014-06-05 | Tektronix Inc | Calibration method of rf signal source and amplitude flatness and phase linearity calibration unit |
| CN104678343A (en) * | 2015-02-10 | 2015-06-03 | 深圳市鼎阳科技有限公司 | Frequency response characteristic calibration method, device and system of waveform generator |
| CN106292837A (en) * | 2016-07-26 | 2017-01-04 | 中国电子科技集团公司第四十研究所 | A kind of call method of AWG (Arbitrary Waveform Generator) amplitude calibration data |
| CN106506101A (en) * | 2016-09-21 | 2017-03-15 | 深圳市鼎阳科技有限公司 | A kind of receiver amplitude-frequency response automatized calibration method and device |
| CN106788797A (en) * | 2017-02-21 | 2017-05-31 | 成都易慧通科技有限公司 | A kind of high-precision radio frequency signal source power quick calibration method |
| CN107356898A (en) * | 2017-08-29 | 2017-11-17 | 广东电网有限责任公司电力科学研究院 | A kind of harmonic signal source calibration method and power quality standard harmonic signal source |
-
2018
- 2018-12-05 CN CN201811479177.9A patent/CN110988464A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441232A (en) * | 2008-12-25 | 2009-05-27 | 中南大学 | Time base frequency real time calibration frequency measuring method and apparatus |
| CN102025430A (en) * | 2010-11-19 | 2011-04-20 | 中兴通讯股份有限公司 | Closed loop-based automatic calibration method and equipment |
| US20120185199A1 (en) * | 2011-01-14 | 2012-07-19 | Moran Tamir E | User-Invoked Calibration of Modular System Using an Embedded Calibration Signal Generator |
| CN103178779A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Signal generator with amplitude compensation function and method thereof |
| JP2014103671A (en) * | 2012-11-20 | 2014-06-05 | Tektronix Inc | Calibration method of rf signal source and amplitude flatness and phase linearity calibration unit |
| CN104678343A (en) * | 2015-02-10 | 2015-06-03 | 深圳市鼎阳科技有限公司 | Frequency response characteristic calibration method, device and system of waveform generator |
| CN106292837A (en) * | 2016-07-26 | 2017-01-04 | 中国电子科技集团公司第四十研究所 | A kind of call method of AWG (Arbitrary Waveform Generator) amplitude calibration data |
| CN106506101A (en) * | 2016-09-21 | 2017-03-15 | 深圳市鼎阳科技有限公司 | A kind of receiver amplitude-frequency response automatized calibration method and device |
| CN106788797A (en) * | 2017-02-21 | 2017-05-31 | 成都易慧通科技有限公司 | A kind of high-precision radio frequency signal source power quick calibration method |
| CN107356898A (en) * | 2017-08-29 | 2017-11-17 | 广东电网有限责任公司电力科学研究院 | A kind of harmonic signal source calibration method and power quality standard harmonic signal source |
Non-Patent Citations (1)
| Title |
|---|
| 滕友伟: "一种任意波形发生器幅度校准数据的调用方法", 《电子质量》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780736A (en) * | 2020-05-28 | 2020-10-16 | 深迪半导体(上海)有限公司 | Micro-mechanical structure driving amplitude correction system and method |
| CN111780736B (en) * | 2020-05-28 | 2022-03-08 | 深迪半导体(绍兴)有限公司 | Micro-mechanical structure driving amplitude correction system and method |
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