CN115395889A - System and method for calibrating and optimizing frequency hopping time by loop preset voltage - Google Patents
System and method for calibrating and optimizing frequency hopping time by loop preset voltage Download PDFInfo
- Publication number
- CN115395889A CN115395889A CN202211080101.5A CN202211080101A CN115395889A CN 115395889 A CN115395889 A CN 115395889A CN 202211080101 A CN202211080101 A CN 202211080101A CN 115395889 A CN115395889 A CN 115395889A
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- oscillator
- voltage
- loop
- temperature
- calibration mode
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005457 optimization Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/02—Details
- H03B5/04—Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/085—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal
- H03L7/093—Details of the phase-locked loop concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal using special filtering or amplification characteristics in the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/08—Details of the phase-locked loop
- H03L7/099—Details of the phase-locked loop concerning mainly the controlled oscillator of the loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
- H03B2201/02—Varying the frequency of the oscillations by electronic means
- H03B2201/0208—Varying the frequency of the oscillations by electronic means the means being an element with a variable capacitance, e.g. capacitance diode
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- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The invention provides a system and a method for calibrating and optimizing frequency hopping time by using preset voltage of a loop, wherein the voltage acquired in a calibration mode is used as the preset voltage in a working mode to control the output frequency of an oscillator; the temperature sensor monitors the temperature of the oscillator, if the temperature is changed greatly compared with the temperature in the calibration mode, recalibration is prompted, and accurate oscillator parameters are obtained through the calibration mode. According to the invention, the calibration mode is realized by adding the ADC, so that the accurate relation between the VT of the oscillator and the output frequency is obtained, and meanwhile, the temperature of the oscillator is monitored in real time through the temperature sensor, so that the parameter change of the oscillator is ensured to be small. Under the condition of knowing the relationship between the accurate oscillator VT and the output frequency, the optimization of the frequency hopping time can be realized according to the current quick hopping preset circuit.
Description
Technical Field
The invention relates to a system and a method for calibrating and optimizing frequency hopping time by using loop preset voltage, belonging to the technical field of loop control.
Background
In order to realize fast jump, the loop voltage presetting is a good method, a block diagram of the loop voltage presetting is shown in fig. 1, the relation between the voltage of the oscillator VT and the output frequency is tested in advance, when the loop jumps, the voltage of the DAC is switched to enable the VT of the oscillator to be fast switched to the required voltage, and the voltage output by a normal loop is preferably kept unchanged, so that the frequency hopping time is fastest, wherein each time of frequency hopping, the larger the voltage change output by the normal loop is, the slower the frequency hopping time is correspondingly.
The main disadvantages of this method are: the corresponding relationship between the VT voltage of the oscillator and the output frequency fluctuates at three temperatures, which results in a low accuracy of the preset frequency. The normal loop output voltage has large variation, which causes the loop locking time to fluctuate greatly under the condition of three temperatures.
The relation between the voltage and the output frequency of the oscillator VT is tested in advance, when the loop jumps, the voltage of the DAC is switched to enable the VT of the oscillator to be quickly switched to the required voltage, and the voltage output by the normal loop is preferably kept unchanged, so that the frequency hopping time is fastest, wherein each time the frequency hopping is carried out, the larger the voltage change output by the normal loop is, the slower the frequency hopping time is correspondingly.
The problem of the current scheme is not big under the constant temperature state, but when the temperature changes, the parameters of the oscillator change along with the temperature change, the corresponding relation between the VT voltage and the output frequency changes, and the frequency hopping time changes greatly.
Disclosure of Invention
In view of the above technical problems, an object of the present invention is to provide a system and a method for calibrating and optimizing frequency hopping time of a loop preset voltage, which calibrate a fast-locking loop preset voltage, so that the loop preset voltage is more accurate, and further optimize the frequency hopping time.
In order to solve the problems, the invention adopts the technical scheme that:
a loop preset voltage calibration optimization frequency hopping time system sequentially comprises a phase discriminator, a loop, an operational amplifier and an oscillator, wherein the operational amplifier is connected with a DAC;
the temperature sensor is used for monitoring the temperature of the oscillator; the method also comprises the step of connecting an ADC between the operational amplifier and the oscillator to acquire the loop voltage during locking.
The method comprises a calibration mode with an oscillator, the oscillator is sequentially locked according to 10M steps, and the ADC collects and records the voltage.
Specifically, the voltage collected in the calibration mode is used as a preset voltage in the working mode to control the output frequency of the oscillator;
the temperature sensor monitors the temperature of the oscillator, and if the temperature changes greatly when being compared with the temperature in the calibration mode, preferably, the temperature changes more than 10 ℃ to change greatly, recalibration is prompted, and accurate oscillator parameters are obtained through the calibration mode.
According to the invention, the calibration mode is realized by adding the ADC, so that the accurate relation between the VT of the oscillator and the output frequency is obtained, and meanwhile, the temperature of the oscillator is monitored in real time through the temperature sensor, so that the parameter change of the oscillator is ensured to be small. Under the condition of knowing the relation between the accurate oscillator VT and the output frequency, the optimization of the frequency hopping time can be realized according to the current quick hopping preset circuit.
Drawings
FIG. 1 is a schematic diagram of a prior art loop voltage preset;
fig. 2 is a schematic diagram of the loop voltage preset optimization of the present invention.
Detailed Description
Embodiments of the present invention are further illustrated, but are not limited to, the following examples in conjunction with the accompanying drawings:
as shown in fig. 2, firstly, a loop preset voltage calibration optimized frequency hopping time system is provided, which sequentially comprises a phase discriminator, a loop, an operational amplifier and an oscillator, wherein the operational amplifier is connected with a DAC;
the temperature sensor is used for monitoring the temperature of the oscillator; and the method also comprises the step of connecting an ADC between the operational amplifier and the oscillator to acquire the loop voltage during locking.
The invention adds a temperature sensor and an ADC on the basis of the original circuit to acquire the loop voltage during locking. An oscillator calibration mode is added to the method control, the oscillators are sequentially locked according to 10M steps, and the ADC collects and records the voltage.
Specifically, the voltage collected in the calibration mode is used as the preset voltage in the working mode, so that the output frequency of the oscillator can be accurately controlled. Meanwhile, the temperature sensor is additionally arranged to monitor the temperature near the oscillator, if the temperature is changed greatly in the calibration mode, recalibration is prompted, so that accurate oscillator parameters can be obtained through the calibration mode, and accurate control of the output frequency of the oscillator is achieved. The normal loop voltage is basically unchanged, and the rapid jump of the frequency is realized.
Claims (4)
1. A loop preset voltage calibration optimization frequency hopping time system sequentially comprises a phase discriminator, a loop, an operational amplifier and an oscillator, wherein the operational amplifier is connected with a DAC;
the method is characterized in that: the temperature sensor is used for monitoring the temperature of the oscillator;
and the method also comprises the step of connecting an ADC between the operational amplifier and the oscillator to acquire the loop voltage during locking.
2. A method for calibrating and optimizing frequency hopping time by using loop preset voltage is characterized by comprising a calibration mode with an oscillator, the oscillator is sequentially locked according to 10M steps, and an ADC acquires and records voltage.
3. The method for optimizing frequency hopping time through loop preset voltage calibration according to claim 2, wherein the voltage collected in the calibration mode is used as the preset voltage in the working mode to control the output frequency of the oscillator;
and the temperature sensor monitors the temperature of the oscillator, if the temperature changes more than a threshold value than the time of the calibration mode, recalibration is prompted, and accurate oscillator parameters are obtained through the calibration mode.
4. The method according to claim 3, wherein the temperature changes more than 10 degrees Celsius than the calibration mode, which indicates a recalibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211080101.5A CN115395889A (en) | 2022-09-05 | 2022-09-05 | System and method for calibrating and optimizing frequency hopping time by loop preset voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211080101.5A CN115395889A (en) | 2022-09-05 | 2022-09-05 | System and method for calibrating and optimizing frequency hopping time by loop preset voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115395889A true CN115395889A (en) | 2022-11-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211080101.5A Pending CN115395889A (en) | 2022-09-05 | 2022-09-05 | System and method for calibrating and optimizing frequency hopping time by loop preset voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115395889A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859004A (en) * | 2005-12-01 | 2006-11-08 | 华为技术有限公司 | Phase-locked loop and method for improving clock accuracy |
| CN106027044A (en) * | 2016-05-24 | 2016-10-12 | 中国电子科技集团公司第四十研究所 | System and method for automatically calibrating pre-set frequency of multi-loop frequency synthesizer |
| CN106199184A (en) * | 2015-05-07 | 2016-12-07 | 苏州普源精电科技有限公司 | A kind of spectrum analyzer with quick phase-locked function |
| CN111211777A (en) * | 2020-01-14 | 2020-05-29 | 中山大学 | System, method and device for preventing chip time sequence violation |
| CN213637720U (en) * | 2020-11-27 | 2021-07-06 | 成都嘉晨科技有限公司 | Ultra-wideband fine stepping fast frequency hopping source |
-
2022
- 2022-09-05 CN CN202211080101.5A patent/CN115395889A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859004A (en) * | 2005-12-01 | 2006-11-08 | 华为技术有限公司 | Phase-locked loop and method for improving clock accuracy |
| CN106199184A (en) * | 2015-05-07 | 2016-12-07 | 苏州普源精电科技有限公司 | A kind of spectrum analyzer with quick phase-locked function |
| CN106027044A (en) * | 2016-05-24 | 2016-10-12 | 中国电子科技集团公司第四十研究所 | System and method for automatically calibrating pre-set frequency of multi-loop frequency synthesizer |
| CN111211777A (en) * | 2020-01-14 | 2020-05-29 | 中山大学 | System, method and device for preventing chip time sequence violation |
| CN213637720U (en) * | 2020-11-27 | 2021-07-06 | 成都嘉晨科技有限公司 | Ultra-wideband fine stepping fast frequency hopping source |
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Application publication date: 20221125 |