Oscillator excitation power testing device

Abstract

This application discloses an oscillator excitation power testing device, comprising a sampling module, a chopper module, and a control module connected in sequence. The two input terminals of the sampling module are respectively connected to the two ends of the sampling resistor of the oscillator, used to acquire the AC voltage signal at the start of oscillation and amplify the AC voltage signal to a preset factor. The chopper module is used to convert the amplified AC voltage signal into a useful signal located at a first target position in the frequency domain; wherein, the first target position is the position where the control module can acquire the useful signal. The control module is used to acquire the useful signal, convert it into the excitation voltage of the oscillator according to the preset factor, and obtain the excitation power of the oscillator based on the excitation voltage and the resistance value of the sampling resistor. That is, the solution of this application can obtain the excitation power of the oscillator without relying on a current probe, making the measurement accuracy of the excitation power sufficiently precise to meet the increasingly higher measurement accuracy requirements.

Description

Technical Field

[0001] This application relates to the field of oscillator technology, and in particular to an oscillator excitation power testing device. Background Technology

[0002] Excitation power refers to the electrical power consumed by the quartz crystal in the oscillator during oscillation. However, the excitation power needs to be controlled within the specifications of the quartz crystal. Excessive excitation power will cause fluctuations in the oscillation frequency, decreased stability, changes in equivalent circuit parameters, or frequency distortion. Too high an excitation power may also cause the oscillator to repeatedly oscillate abnormally, leading to malfunctions.

[0003] In existing technologies, the testing of oscillator excitation power uses a high-precision current probe on an oscilloscope. Through the principle of electromagnetic induction, the oscilloscope measures the alternating current flowing through the quartz crystal. The accuracy of the excitation power measured by this method mainly depends on the accuracy and measurement range of the current probe. However, because the minimum current resolution accuracy of currently available current probes is relatively low, it cannot meet the ever-increasing demands for measurement accuracy. Summary of the Invention

[0004] This application provides an oscillator excitation power testing device to address the problem that the measurement accuracy of excitation power in the prior art mainly depends on the accuracy and measurement range of the current probe, and that the minimum current resolution accuracy of the current probes currently on the market is relatively small, which cannot meet the increasingly higher measurement accuracy requirements.

[0005] This application provides an oscillator excitation power testing device, the device comprising a sampling module, a chopper module and a control module connected in sequence;

[0006] The two input terminals of the sampling module are respectively connected to the two ends of the sampling resistor of the oscillator to obtain the AC voltage signal when the oscillator starts oscillating and amplify the AC voltage signal to a preset multiple.

[0007] The chopper module is used to convert the amplified AC voltage signal into a useful signal located at a first target position in the frequency domain; wherein, the first target position is the position where the control module can acquire the useful signal;

[0008] The control module is used to acquire the useful signal, convert the useful signal into the excitation voltage of the oscillator according to the preset multiple, and obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor.

[0009] The scheme of this application includes an oscillator excitation power testing device comprising a sampling module, a chopper module, and a control module connected in sequence. The two input terminals of the sampling module are respectively connected to the two ends of the sampling resistor of the oscillator, used to acquire the AC voltage signal at the start of oscillation and amplify the AC voltage signal to a preset factor. The chopper module is used to convert the amplified AC voltage signal into a useful signal at a first target position in the frequency domain; wherein, the first target position is the position where the control module can acquire the useful signal. The control module is used to acquire the useful signal, convert the useful signal into the excitation voltage of the oscillator according to the preset factor, and obtain the excitation power of the oscillator based on the excitation voltage and the resistance value of the sampling resistor. In other words, the scheme of this application, on the one hand, obtains the AC voltage signal at the start of oscillation of the oscillator, processes the AC voltage signal to obtain the excitation voltage of the oscillator, and then obtains the excitation power of the oscillator, thus obtaining the excitation power of the oscillator without relying on a current probe, so that the measurement accuracy of the excitation power is not affected by the accuracy of the current probe. On the other hand, after the sampling module acquires the AC voltage signal at the start of the oscillator's oscillation, it amplifies the AC voltage signal. Therefore, the acquired AC voltage signal can be small enough, which in turn makes the excitation power of the oscillator sufficiently accurate to meet the ever-increasing measurement accuracy requirements. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the oscillator excitation power testing device provided in this application;

[0012] Figure 2 This is another structural schematic diagram of the oscillator excitation power testing device provided in this application;

[0013] Figure 3 This is another structural schematic diagram of the oscillator excitation power testing device provided in this application;

[0014] Figure 4 This is an exemplary excitation power testing process diagram of the oscillator excitation power testing device provided in this application. Detailed Implementation

[0015] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0016] Figure 1 This is a schematic diagram of the oscillator excitation power testing device provided in this application, which can be used to test the excitation power of an oscillator. Figure 1 As shown, the oscillator excitation power testing device 01 includes a sampling module 02, a chopper module 03, and a control module 04 connected in sequence.

[0017] The two input terminals of the sampling module 02 are connected to the two ends of the sampling resistor 11 of the oscillator, respectively, to obtain the AC voltage signal when the oscillator starts oscillating and amplify the AC voltage signal to a preset multiple.

[0018] Specifically, the two input terminals of sampling module 02 are connected to the two ends of sampling resistor 11 of the oscillator, respectively, and can acquire the AC voltage signal across sampling resistor 11. When the oscillator starts oscillating, the two input terminals of sampling module 02 acquire the AC voltage signal at the start of oscillator oscillation. After acquiring the AC voltage signal at the start of oscillation, the AC voltage signal is amplified to a preset multiple. The preset multiple is the preset gain multiple in sampling module 02. Because the modules after sampling module 02 process the amplified signal, the larger the preset multiple, the smaller the signal obtained by sampling module 02 can be, thus improving measurement accuracy, while ensuring that the amplified signal meets the processing conditions of other modules.

[0019] The chopper module 03 is used to convert the amplified AC voltage signal into a useful signal that is at the first target position in the frequency domain.

[0020] The first target position is the position where the control module 04 can collect useful signals.

[0021] Specifically, the chopper module 03 receives the amplified AC voltage signal sent by the sampling module 02 and converts it into a useful signal located at the first target position in the frequency domain. The frequency domain coordinate system is a coordinate system describing the frequency characteristics of a signal; the horizontal axis represents frequency, and the vertical axis represents the signal amplitude. The useful signal refers to the useful signal within the amplified AC voltage signal, i.e., the signal required by the control module 04 to calculate the excitation power of the oscillator. The chopper module 03 utilizes signal correlation to transform the amplified AC voltage signal in the frequency domain, converting it into a useful signal located at the first target position in the frequency domain. For example, the first target position can be a position in the frequency domain coordinate system ranging from -1 kHz (kilohertz) from the vertical axis to 1 kHz from the vertical axis.

[0022] Optionally, the chopper module 03 is also used to convert the amplified AC voltage signal into a noise signal at the second target position in the frequency domain, and to filter out the noise signal.

[0023] The second target position is the position where the chopper module 03 can filter out the signal.

[0024] Specifically, after receiving the amplified AC voltage signal sent by the sampling module 02, the chopper module 03 utilizes signal correlation to transform the amplified AC voltage signal in the frequency domain, converting the noise signal in the amplified AC voltage signal into a noise signal located at the second target position in the frequency domain, and then filtering out the noise signal. For example, the second target position can be a position on the frequency domain coordinate system ranging from 20kHz to 21kHz from the vertical axis of the frequency domain coordinate system.

[0025] For example, after receiving the amplified AC voltage signal sent by the sampling module 02, the chopper module 03 uses signal correlation to transform the amplified AC voltage signal in the frequency domain, so that the useful signal at the second target position is converted into the useful signal at the first target position, and the noise signal at the first target position is converted into the noise signal at the second target position, and the noise signal is filtered out.

[0026] Optionally, the noise signal includes at least one of the following: imbalance noise and flicker noise.

[0027] Specifically, both offset noise and flicker noise are low-frequency noise, which can easily interfere with the useful signal at the first target position. The chopper module 03 converts the offset noise and / or flicker noise into a noise signal located at the second target position in the frequency domain and filters out the noise signal. This improves the signal-to-noise ratio, thereby improving measurement accuracy and further enhancing the resolution of the excitation power measurement.

[0028] The control module 04 is used to acquire useful signals, convert the useful signals into the excitation voltage of the oscillator according to a preset multiple, and obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor 11.

[0029] Specifically, the control module 04 acquires the useful signal at the first target position to obtain the useful signal amplitude. For example, the highest amplitude within the first target position can be acquired as the useful signal amplitude. After obtaining the useful signal amplitude, it is reduced by a corresponding factor according to a preset factor to obtain the excitation voltage of the oscillator. Based on the excitation voltage and the resistance value of the sampling resistor 11, and using Ohm's law, the excitation current of the oscillator is obtained, and the excitation power of the oscillator is further obtained.

[0030] Optionally, the oscillator excitation power test device 01 is a calibrated oscillator excitation power test device 01.

[0031] Specifically, the oscillator excitation power testing device 01 is calibrated before being used to test the oscillator excitation power. A constant current source (also called a constant current source) is connected to the oscillator excitation power testing device 01, and the current value of the constant current source is determined by the oscillator excitation power testing device 01. If the obtained current value matches the constant current source current value, that is, the error between the current value and the constant current source current value is within a preset error range, then the oscillator excitation power testing device 01 is determined to be usable. If the obtained current value does not match the constant current source current value, that is, the error between the current value and the constant current source current value is outside the preset error range, then the oscillator excitation power testing device 01 is determined to be unusable, and the oscillator excitation power testing device 01 is adjusted and calibrated again until the obtained current value matches the constant current source current value.

[0032] The scheme of this application includes an oscillator excitation power testing device comprising a sampling module, a chopper module, and a control module connected in sequence. The two input terminals of the sampling module are respectively connected to the two ends of the sampling resistor of the oscillator, used to acquire the AC voltage signal at the start of oscillation and amplify the AC voltage signal to a preset factor. The chopper module is used to convert the amplified AC voltage signal into a useful signal at a first target position in the frequency domain; wherein, the first target position is the position where the control module can acquire the useful signal. The control module is used to acquire the useful signal, convert the useful signal into the excitation voltage of the oscillator according to the preset factor, and obtain the excitation power of the oscillator based on the excitation voltage and the resistance value of the sampling resistor. In other words, the scheme of this application, on the one hand, obtains the AC voltage signal at the start of oscillation of the oscillator, processes the AC voltage signal to obtain the excitation voltage of the oscillator, and then obtains the excitation power of the oscillator, thus obtaining the excitation power of the oscillator without relying on a current probe, so that the measurement accuracy of the excitation power is not affected by the accuracy of the current probe. On the other hand, after the sampling module acquires the AC voltage signal at the start of the oscillator's oscillation, it amplifies the AC voltage signal. Therefore, the acquired AC voltage signal can be small enough, which in turn makes the excitation power of the oscillator sufficiently accurate to meet the ever-increasing measurement accuracy requirements.

[0033] Figure 2 This is another structural schematic diagram of the oscillator excitation power testing device provided in this application. This embodiment... Figure 1 Based on the oscillator excitation power testing device 01 shown, the sampling module 02, chopper module 03, and control module 04 of the oscillator excitation power testing device 01 are further refined. Furthermore, the oscillator excitation power testing device 01 with the addition of a low-pass filter module 05 is described.

[0034] Optionally, the sampling module 02 is a high-impedance active probe, including a high-impedance probe connected to both ends of the sampling resistor 11 of the oscillator, and an amplifier 23, with both high-impedance probes connected to the amplifier 23.

[0035] Two high-impedance probes are connected to the two ends of the sampling resistor 11 of the oscillator, respectively, to obtain the AC voltage signal when the oscillator starts oscillating.

[0036] Amplifier 23 is used to amplify AC voltage signals to a preset factor.

[0037] Specifically, such as Figure 2As shown, high-impedance probes 21 and 22 are connected to the two ends of the sampling resistor 11 of the oscillator, respectively, and can acquire the AC voltage signal across the sampling resistor 11. When the oscillator starts oscillating, high-impedance probes 21 and 22 acquire the AC voltage signal at the start of oscillator oscillation. After acquiring the AC voltage signal at the start of oscillation, amplifier 23 amplifies the AC voltage signal to a preset multiple. The preset multiple is the preset gain multiple in amplifier 23.

[0038] Optionally, the chopper module 03 includes a chopper circuit 31 and a filter device 32 connected to each other.

[0039] The chopper circuit 31 is used to convert the amplified AC voltage signal into a useful signal at a first target position and a noise signal at a second target position in the frequency domain.

[0040] The filter device 32 is used to filter out noise signals located at the second target position.

[0041] Specifically, such as Figure 2 As shown, the chopper circuit 31 receives the amplified AC voltage signal sent by the amplifier 23 and converts the amplified AC voltage signal into a useful signal at a first target position and a noise signal at a second target position in the frequency domain. The chopper module 03 utilizes signal correlation to transform the amplified AC voltage signal in the frequency domain, converting it into a useful signal at the first target position and a noise signal at the second target position. For example, the first target position can be a position in the frequency domain coordinate system ranging from -1 kHz to 1 kHz from the vertical axis of the frequency domain coordinate system. The second target position can be a position in the frequency domain coordinate system ranging from 20 kHz to 21 kHz from the vertical axis of the frequency domain coordinate system.

[0042] For example, the amplified AC voltage signal includes a useful signal located in the frequency domain coordinate system from 20 kHz to 21 kHz from the vertical axis of the frequency domain coordinate system, and a noise signal located from -1 kHz to 1 kHz from the vertical axis of the frequency domain coordinate system. After receiving the amplified AC voltage signal sent by the amplifier 23, the chopper circuit 31 converts the amplified AC voltage signal into a useful signal located in the frequency domain from -1 kHz to 1 kHz from the vertical axis of the frequency domain coordinate system, and a noise signal located from 20 kHz to 21 kHz from the vertical axis of the frequency domain coordinate system.

[0043] After receiving the useful signal at the first target position and the noise signal at the second target position, the filtering device 32 filters out the noise signal at the second target position. Filtering out the noise signal at the second target position improves the signal-to-noise ratio, thereby improving the measurement accuracy and further improving the resolution of the excitation power measurement.

[0044] Optionally, the control module 04 includes a signal acquisition unit 41 and a processing unit 42 that are interconnected.

[0045] The signal acquisition unit 41 is used to acquire multiple component signals of the useful signal.

[0046] The processing unit 42 is used to convert multiple component signals into the excitation voltage of the oscillator according to a preset multiple, and to obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor 11.

[0047] Specifically, such as Figure 2 As shown, the signal acquisition unit 41 acquires the useful signal at the first target location, obtaining multiple component signals of the useful signal. For example, the useful signal is acquired once every 100Hz. The signal acquisition unit 41 can be an analog-to-digital converter.

[0048] The processing unit 42 calculates the statistical parameters of the multiple component signals, such as obtaining the average value of the multiple component signals, as the signal value. Based on a preset factor, the signal value is reduced accordingly to obtain the excitation voltage of the oscillator. Based on the excitation voltage and the resistance value of the sampling resistor 11, and using Ohm's law, the excitation current of the oscillator is obtained, and further, the excitation power of the oscillator is obtained.

[0049] Optionally, the processing unit 42 includes a conversion unit 421 and a calculation unit 422 that are interconnected.

[0050] The conversion unit 421 is used to determine the statistical parameters of multiple component signals and convert the statistical parameters into the excitation voltage of the oscillator according to a preset multiple.

[0051] The calculation unit 422 is used to obtain the excitation power of the oscillator based on the excitation voltage and the resistance value of the sampling resistor 11.

[0052] Specifically, such as Figure 2 As shown, the conversion unit 421 calculates multiple component signals to determine their statistical parameters, such as obtaining the average value of the multiple component signals as the signal value. Based on a preset factor, the signal value is reduced accordingly to obtain the excitation voltage of the oscillator. The calculation unit 422, based on the excitation voltage and the resistance value of the sampling resistor 11, and using Ohm's law, obtains the excitation current of the oscillator, and further obtains the excitation power of the oscillator.

[0053] Optionally, the conversion unit 421 is specifically used to determine the root mean square value of multiple component signals.

[0054] Specifically, when the conversion unit 421 determines the statistical parameters of multiple component signals, the determined statistical parameters are root mean square values.

[0055] Optionally, the oscillator excitation power testing device 01 further includes a low-pass filter module 05. The low-pass filter module 05 is located between the chopper module 03 and the control module 04. The low-pass filter module 05 is used to perform low-pass filtering on the useful signal to obtain the low-pass filtered useful signal.

[0056] Specifically, the low-pass filter module 05 can be a low-pass filter. Figure 3 This is another structural schematic diagram of the oscillator excitation power testing device 01 provided in this application. (See diagram below.) Figure 3 As shown, the useful signal output by chopper module 03 may include noise signals that other chopper modules 03 have not filtered out. Low-pass filter module 05 performs low-pass filtering on the useful signal to obtain the low-pass filtered useful signal. This further eliminates noise, improves the signal-to-noise ratio, and thus improves measurement accuracy.

[0057] For example, after receiving the amplified AC voltage signal sent by the sampling module 02, the chopper module 03 uses signal correlation to transform the amplified AC voltage signal in the frequency domain, converting the useful signal at the second target position into a useful signal at the first target position, and converting the noise signal at the first target position into a noise signal at the second target position, and then filtering out the noise signal. The low-pass filter module 05 receives the useful signal sent by the chopper module 03, performs low-pass filtering, and obtains the low-pass filtered useful signal.

[0058] The control module 04 is used to acquire the useful signal after low-pass filtering, convert the useful signal after low-pass filtering into the excitation voltage of the oscillator according to the preset multiple, and obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor 11.

[0059] In one possible implementation, the control module 04 acquires the low-pass filtered useful signal at the first target position to obtain the amplitude of the low-pass filtered useful signal. For example, the highest amplitude within the first target position can be acquired as the amplitude of the low-pass filtered useful signal. After obtaining the amplitude of the low-pass filtered useful signal, the amplitude is reduced by a corresponding factor according to a preset factor to obtain the excitation voltage of the oscillator. Based on the excitation voltage and the resistance value of the sampling resistor 11, and using Ohm's law, the excitation current of the oscillator is obtained, and the excitation power of the oscillator is further obtained.

[0060] In another possible implementation, the signal acquisition unit 41 acquires the low-pass filtered useful signal at the first target location, obtaining multiple component signals of the low-pass filtered useful signal. The conversion unit 421 in the processing unit 42 calculates the multiple component signals of the low-pass filtered useful signal, determining the statistical parameters of the multiple component signals, such as obtaining the average value of the multiple component signals as the signal value. Based on a preset factor, the signal value is reduced accordingly to obtain the excitation voltage of the oscillator. The calculation unit 422 in the processing unit 42, based on the excitation voltage and the resistance value of the sampling resistor 11, and using Ohm's law, obtains the excitation current of the oscillator, and further obtains the excitation power of the oscillator.

[0061] For example, Figure 4 This is an exemplary excitation power testing process diagram of the oscillator excitation power testing device 01 provided in this application. Figure 4 As shown, the simplified circuit diagram of the oscillator consists of an oscillator crystal X101, an internal feedback resistor R110, a sampling resistor R101, a first capacitor C174, and a second capacitor C175. in and X out These are the two pins of the quartz crystal X101. High-impedance probes 21 and 22 are connected to the two ends of the sampling resistor R101 to acquire the AC voltage signal at the start of oscillation. Amplifier 23 amplifies this AC voltage signal to a preset factor. The amplified AC voltage signal is input to chopper circuit 31, which converts the amplified AC voltage signal into a useful signal at a first target position and a noise signal at a second target position in the frequency domain. Filtering device 32 filters out the noise signal at the second target position. Low-pass filter module 05 performs low-pass filtering on the useful signal to obtain the low-pass filtered useful signal. Signal acquisition unit 41 acquires the low-pass filtered useful signal to obtain multiple component signals of the low-pass filtered useful signal. Conversion unit 421 in processing unit 42 calculates the multiple component signals to determine the root mean square (RMS) value of the multiple component signals. Based on the preset factor, the RMS value is reduced by a corresponding factor to obtain the excitation voltage of the oscillator. The calculation unit 422 in the processing unit 42 obtains the excitation current of the oscillator based on the excitation voltage and the resistance value of the sampling resistor R101, and further obtains the excitation power of the oscillator based on Ohm's law.

[0062] The proposed solution uses a high-impedance probe to acquire the AC voltage signal at the start of oscillation, avoiding the introduction of additional load into the probe and thus improving measurement accuracy. The AC voltage signal is amplified by increasing the amplifier gain. While ensuring the amplified signal meets the processing conditions of other modules, a higher amplifier gain results in a smaller signal from the high-impedance probe, thus improving measurement accuracy. A chopper circuit converts the noise signal to the second target position, and a filter removes the noise signal at the second target position, improving the signal-to-noise ratio and consequently increasing measurement accuracy, further enhancing the resolution of the excitation power measurement. The signal acquisition unit acquires multiple components of the useful signal, and the processing unit's conversion unit obtains the statistical parameters of these components and converts them into an excitation voltage, improving the accuracy of the excitation voltage measurement.

[0063] It is worth noting that in the embodiments of the above-mentioned oscillator excitation power testing device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of this application.

[0064] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. An oscillator excitation power testing device, characterized in that, The device includes a sampling module, a chopper module, and a control module connected in sequence. The two input terminals of the sampling module are respectively connected to the two ends of the sampling resistor of the oscillator to obtain the AC voltage signal when the oscillator starts oscillating and amplify the AC voltage signal to a preset multiple. The chopper module is used to convert the amplified AC voltage signal into a useful signal located at a first target position in the frequency domain; wherein, the first target position is the position where the control module can acquire the useful signal; The control module is used to acquire the useful signal, convert the useful signal into the excitation voltage of the oscillator according to the preset multiple, and obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor.

2. The oscillator excitation power testing device according to claim 1, characterized in that, The sampling module is a high-impedance active probe, including a high-impedance probe connected to both ends of the sampling resistor of the oscillator, and an amplifier, with both high-impedance probes connected to the amplifier. The two high-impedance probes are respectively connected to the two ends of the sampling resistor of the oscillator to obtain the AC voltage signal when the oscillator starts oscillating; The amplifier is used to amplify the AC voltage signal to a preset multiple.

3. The oscillator excitation power testing device according to claim 1, characterized in that, The chopper module is also used to convert the amplified AC voltage signal into a noise signal located at a second target position in the frequency domain, and to filter out the noise signal; wherein, the second target position is the position where the chopper module can filter out the signal.

4. The oscillator excitation power testing device according to claim 3, characterized in that, The chopper module includes interconnected chopper circuits and filtering devices; The chopper circuit is used to convert the amplified AC voltage signal into a useful signal at the first target position and a noise signal at the second target position in the frequency domain. The filtering device is used to filter out the noise signal located at the second target position.

5. The oscillator excitation power testing device according to claim 3, characterized in that, The noise signal includes at least one of the following: misalignment noise and flicker noise.

6. The oscillator excitation power testing device according to claim 1, characterized in that, The control module includes interconnected signal acquisition units and processing units; The signal acquisition unit is used to acquire multiple component signals of the useful signal; The processing unit is used to convert the plurality of component signals into the excitation voltage of the oscillator according to the preset multiple, and to obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor.

7. The oscillator excitation power testing device according to claim 6, characterized in that, The processing unit includes a conversion unit and a calculation unit that are interconnected. The conversion unit is used to determine the statistical parameters of the plurality of component signals, and convert the statistical parameters into the excitation voltage of the oscillator according to the preset multiple; The calculation unit is used to obtain the excitation power of the oscillator based on the excitation voltage and the resistance value of the sampling resistor.

8. The oscillator excitation power testing device according to claim 7, characterized in that, The conversion unit is specifically used to determine the root mean square value of the plurality of component signals.

9. The oscillator excitation power testing device according to claim 1, characterized in that, The device also includes a low-pass filter module; The low-pass filter module is disposed between the chopper module and the control module; The low-pass filter module is used to perform low-pass filtering on the useful signal to obtain the low-pass filtered useful signal. The control module is used to acquire the useful signal after low-pass filtering, convert the useful signal after low-pass filtering into the excitation voltage of the oscillator according to the preset multiple, and obtain the excitation power of the oscillator according to the excitation voltage and the resistance value of the sampling resistor.

10. The oscillator excitation power testing device according to claim 1, characterized in that, The oscillator excitation power testing device is a calibrated oscillator excitation power testing device.

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