CN114244326B - Adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference - Google Patents
Adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference Download PDFInfo
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- CN114244326B CN114244326B CN202210168813.6A CN202210168813A CN114244326B CN 114244326 B CN114244326 B CN 114244326B CN 202210168813 A CN202210168813 A CN 202210168813A CN 114244326 B CN114244326 B CN 114244326B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/22—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral
- H03K5/26—Circuits having more than one input and one output for comparing pulses or pulse trains with each other according to input signal characteristics, e.g. slope, integral the characteristic being duration, interval, position, frequency, or sequence
Abstract
The invention discloses an adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference, which relates to the technical field of digital information transmission and signal transmission and comprises the following components: the first crystal oscillator module and the second crystal oscillator module respectively generate a first crystal oscillator frequency and a second crystal oscillator frequency with different frequencies; the pulse triggering module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for generating a pulse signal according to a crystal oscillator frequency difference of the first crystal oscillator frequency and the second crystal oscillator frequency; the clock synchronization comparison module receives the first crystal oscillator frequency and the second crystal oscillator frequency and is used for obtaining a frequency comparison result according to the first crystal oscillator frequency and the second crystal oscillator frequency; the control module receives the frequency comparison result, is used for controlling the first crystal oscillator module or the second crystal oscillator module to adjust the generated crystal oscillator frequency according to the set working state according to the frequency comparison result, and selects a required pulse signal from the pulse signals according to the crystal oscillator frequency difference and the required pulse width. Automatically adjusting the crystal oscillator frequency output by the crystal oscillator module; the pulse width can be flexibly selected.
Description
Technical Field
The invention relates to the technical field of digital information transmission and signal transmission, in particular to an adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference.
Background
The high-frequency pulse signal generator is mainly used for generating a rectangular pulse generator with adjustable width, amplitude and repetition frequency, and can be used for testing the transient response of a linear system or testing the performance of a radar, multipath communication and other pulse digital systems by using an analog signal. When the radio frequency signal is analyzed in a radio frequency circuit, a pulse signal with the highest picosecond-level pulse width is needed to be used as a reference, while the existing high-frequency pulse signal generator needs to use a complex processor and has higher cost, or an LC oscillator is adopted, so that the problem of easy drift exists, and real-time calibration is needed.
Disclosure of Invention
In order to solve the problems, the invention provides a high-frequency pulse generator with adjustable pulse width picosecond level based on crystal oscillator frequency difference, which automatically adjusts the crystal oscillator frequency output by a crystal oscillator module according to the comparison result of two paths of crystal oscillator frequencies; and controlling to generate a pulse signal by using the crystal oscillator frequency difference, and selecting the required pulse signal from the generated pulse signal according to the pulse width of the required pulse signal and the pulse width generated by the crystal oscillator frequency difference, wherein the pulse width can be flexibly selected according to application requirements.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a picosecond high frequency pulse generator with adjustable pulse width based on crystal oscillator frequency difference, comprising: the system comprises a first crystal oscillator module, a second crystal oscillator module, a pulse trigger module, a clock synchronization comparison module and a control module;
the first crystal oscillator module and the second crystal oscillator module respectively generate a first crystal oscillator frequency and a second crystal oscillator frequency with different frequencies;
the pulse trigger module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for generating a pulse signal according to a crystal oscillator frequency difference of the first crystal oscillator frequency and the second crystal oscillator frequency;
the clock synchronization comparison module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for obtaining a frequency comparison result according to the first crystal oscillator frequency and the second crystal oscillator frequency;
the control module receives the frequency comparison result, is used for controlling the first crystal oscillator module or the second crystal oscillator module to adjust the generated crystal oscillator frequency according to the set working state according to the frequency comparison result, and selects a required pulse signal from the pulse signals according to the crystal oscillator frequency difference and the required pulse width.
In an alternative embodiment, one of the first and second crystal oscillator modules is configured to generate a fixed crystal oscillator frequency at a fixed nominal power.
In an alternative embodiment, one of the first crystal oscillator module and the second crystal oscillator module is configured to generate an adjustable crystal oscillator frequency at an off-nominal frequency, and is configured to generate a frequency difference with the other crystal oscillator module.
As an alternative embodiment, the adjustable pulse width picosecond high-frequency pulse generator based on the crystal oscillator frequency difference further comprises a voltage excitation module and a voltage-sensitive capacitor, and the control module controls the output voltage value of the voltage excitation module according to the frequency comparison result, so that the capacitance value of the voltage-sensitive capacitor is controlled according to the output voltage value.
In an alternative embodiment, the voltage-sensitive capacitor is used for controlling and adjusting the crystal oscillator frequency value of the first crystal oscillator module or the second crystal oscillator module to achieve the set working state.
As an alternative embodiment, the voltage excitation module controls voltage excitation by a charging mode, thereby controlling the output voltage value.
As an alternative embodiment, the adjustable pulse width picosecond high-frequency pulse generator based on the crystal oscillator frequency difference further comprises a pulse width selection module, and the control module controls the pulse width selection module to select the required pulse signal from the pulse signals generated by the pulse trigger module according to the pulse width of the required pulse signal and the pulse width generated by the crystal oscillator frequency difference.
As an alternative implementation, the pulse triggering module adopts a level triggering mode, when two paths of signals output by the first crystal oscillator module and the second crystal oscillator module are synchronous in clock, the pulse triggering module triggers to generate a pulse signal at a high level, and triggers to turn off the pulse signal at a low level, so that the pulse signal with a certain pulse width is generated by using a crystal oscillator frequency difference.
In an alternative embodiment, the pulse width of the pulse signal ranges from picoseconds to milliseconds.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference, which can generate high-stability signals by using a crystal oscillator, avoids frequency drift and has low cost.
The invention provides an adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference, which adopts a level trigger mode to generate a pulse signal with a certain pulse width by using the crystal oscillator frequency difference control, simultaneously selects a required pulse signal from the generated pulse signal according to the pulse width of the required pulse signal and the pulse width generated by the crystal oscillator frequency difference, can flexibly select the pulse width according to application requirements, and realizes the selection of the pulse width from picosecond magnitude to millisecond magnitude.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic diagram of an adjustable pulse width picosecond-level high-frequency pulse generator based on crystal oscillator frequency difference according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a pulse signal triggered by the pulse triggering module according to embodiment 1 of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and it should be understood that the terms "comprises" and "comprising", and any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example 1
As shown in fig. 1, the present embodiment provides an adjustable pulse width picosecond high-frequency pulse generator based on crystal oscillator frequency difference, including: the system comprises a first crystal oscillator module, a second crystal oscillator module, a pulse trigger module, a clock synchronization comparison module and a control module;
the first crystal oscillator module and the second crystal oscillator module respectively generate a first crystal oscillator frequency and a second crystal oscillator frequency with different frequencies;
the pulse trigger module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for generating a pulse signal according to a crystal oscillator frequency difference of the first crystal oscillator frequency and the second crystal oscillator frequency;
the clock synchronization comparison module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for obtaining a frequency comparison result according to the first crystal oscillator frequency and the second crystal oscillator frequency;
the control module receives the frequency comparison result, is used for controlling the first crystal oscillator module or the second crystal oscillator module to adjust the generated crystal oscillator frequency according to the set working state according to the frequency comparison result, and selects a required pulse signal from the pulse signals according to the crystal oscillator frequency difference and the required pulse width.
In this embodiment, one of the first crystal oscillator module and the second crystal oscillator module generates a fixed crystal oscillator frequency under a fixed nominal power, that is, a fixed nominal crystal oscillator module; the other crystal oscillator module generates different crystal oscillator frequencies under the non-nominal frequency, namely the frequency difference adjusting crystal oscillator module is used for generating frequency difference with the fixed nominal crystal oscillator module.
In this embodiment, after the two crystal oscillator modules send out crystal oscillator frequencies, the crystal oscillator frequencies are input to the clock synchronization comparison module, the clock synchronization comparison module compares the two received signals, and feeds back a comparison result to the control module, and the control module controls the frequency difference to adjust the working state of the crystal oscillator module.
In this embodiment, the adjustable pulse width picosecond-level high-frequency pulse generator based on the crystal oscillator frequency difference further includes a voltage excitation module and a voltage-sensitive capacitor, and the control module controls an output voltage value of the voltage excitation module according to the frequency comparison result, so as to control a capacitance value of the voltage-sensitive capacitor according to the output voltage value.
And the pressure-sensitive capacitor is used for controlling and adjusting the frequency difference to adjust the crystal oscillator frequency value of the crystal oscillator module so as to adjust the frequency difference to adjust the crystal oscillator module to a set working state.
In an alternative embodiment, the voltage excitation module controls voltage excitation by charging, so as to control the voltage output value.
In this embodiment, the fixed nominal crystal oscillator module and the frequency difference adjusting crystal oscillator module use crystal oscillators with the same specification, the fixed nominal crystal oscillator module works at a nominal frequency, the frequency difference adjusting crystal oscillator module adjusts the working frequency through the pressure sensitive capacitor under the control of the control module, and a frequency difference is generated between the two crystal oscillator modules.
In this embodiment, the pulse trigger module adopts a level trigger mode, that is, when two paths of signal clocks output by the fixed nominal crystal oscillator module and the frequency difference adjusting crystal oscillator module are synchronous, the pulse trigger module is triggered to generate a pulse signal at a high level, and the pulse signal is triggered to be turned off at a low level, so that the crystal oscillator frequency difference is utilized to generate a pulse signal with a certain pulse width.
As shown in fig. 2, the pulse signal triggered by the pulse triggering module is shown, and T is the pulse width of the triggering pulse, which is the difference value between the periods of the two signals output by the fixed nominal crystal oscillator module and the frequency difference adjusting crystal oscillator module; as in fig. 2, the pulse width of the pulse signal is: t =1/(T2-T1), the maximum can reach picosecond level, the pulse width can be flexibly selected according to application requirements, and the pulse width can be selected from picosecond level to millisecond level.
In this embodiment, the adjustable pulse width picosecond-level high-frequency pulse generator based on the crystal oscillator frequency difference further includes a pulse width selection module, and the control module controls the pulse width selection module to select a required pulse signal from the pulse signals generated by the pulse trigger module according to the pulse width of the required pulse signal and the pulse width generated by the crystal oscillator frequency difference.
Based on the high-frequency pulse generator, the working method of the high-frequency pulse generator is provided, and comprises the following steps:
the first crystal oscillator module and the second crystal oscillator module respectively generate a first crystal oscillator frequency and a second crystal oscillator frequency with different frequencies;
generating a pulse signal according to the crystal oscillator frequency difference of the first crystal oscillator frequency and the second crystal oscillator frequency;
and after comparing the first crystal oscillator frequency with the second crystal oscillator frequency, controlling the first crystal oscillator module or the second crystal oscillator module to adjust the generated crystal oscillator frequency according to a frequency comparison result and according to the crystal oscillator frequency difference and the required pulse width, selecting the required pulse signal from the pulse signals.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (9)
1. Adjustable pulse width picosecond level high-frequency pulse generator based on crystal oscillator frequency difference is characterized in that the generator comprises: the system comprises a first crystal oscillator module, a second crystal oscillator module, a pulse trigger module, a clock synchronization comparison module and a control module;
the first crystal oscillator module and the second crystal oscillator module respectively generate a first crystal oscillator frequency and a second crystal oscillator frequency with different frequencies;
the pulse trigger module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for generating a pulse signal according to a crystal oscillator frequency difference of the first crystal oscillator frequency and the second crystal oscillator frequency;
the clock synchronization comparison module receives a first crystal oscillator frequency and a second crystal oscillator frequency and is used for obtaining a frequency comparison result according to the first crystal oscillator frequency and the second crystal oscillator frequency;
the control module receives the frequency comparison result, is used for controlling the first crystal oscillator module or the second crystal oscillator module to adjust the generated crystal oscillator frequency according to the set working state according to the frequency comparison result, and selects a required pulse signal from the pulse signals according to the crystal oscillator frequency difference and the required pulse width;
the adjustable pulse width picosecond-level high-frequency pulse generator based on the crystal oscillator frequency difference further comprises a voltage excitation module and a voltage-sensitive capacitor, and the capacitance value of the voltage-sensitive capacitor is controlled according to the output voltage value by controlling the output voltage value of the voltage excitation module.
2. The crystal oscillator frequency difference-based adjustable pulse width picosecond high frequency pulse generator according to claim 1, wherein one of the first crystal oscillator module and the second crystal oscillator module is configured to generate a fixed crystal oscillator frequency at a fixed nominal power.
3. The crystal oscillator frequency difference-based adjustable pulse width picosecond stage high-frequency pulse generator according to claim 1, wherein one of the first crystal oscillator module and the second crystal oscillator module is configured to generate an adjustable crystal oscillator frequency at an off-nominal frequency so as to generate a frequency difference with the other crystal oscillator module.
4. The crystal oscillator frequency difference-based adjustable pulse width picosecond class high-frequency pulse generator according to claim 1, wherein the control module controls the output voltage value of the voltage excitation module according to the frequency comparison result.
5. The crystal oscillator frequency difference-based adjustable pulse width picosecond high-frequency pulse generator according to claim 1, wherein the voltage-sensitive capacitor is used for controlling and adjusting the crystal oscillator frequency value of the first crystal oscillator module or the second crystal oscillator module to achieve the set working state.
6. The crystal oscillator frequency difference-based adjustable pulse width picosecond class high-frequency pulse generator according to claim 1, wherein the voltage excitation module controls voltage excitation in a charging mode so as to control the output voltage value.
7. The crystal oscillator frequency difference-based adjustable pulse width picosecond stage high-frequency pulse generator according to claim 1, wherein the crystal oscillator frequency difference-based adjustable pulse width picosecond stage high-frequency pulse generator further comprises a pulse width selection module, and the control module controls the pulse width selection module to select the required pulse signal from the pulse signals generated by the pulse trigger module according to the pulse width of the required pulse signal and the pulse width generated by the crystal oscillator frequency difference.
8. The adjustable pulse width picosecond high-frequency pulse generator according to claim 1, wherein the pulse triggering module adopts a level triggering mode, when two paths of signals output by the first crystal oscillator module and the second crystal oscillator module are synchronized, the pulse triggering module triggers the generation of a pulse signal at a high level, and triggers the pulse signal to be turned off at a low level, so that the pulse signal with a set pulse width is generated by using the crystal oscillator frequency difference.
9. The crystal oscillator frequency difference-based adjustable pulse width picosecond stage high-frequency pulse generator according to claim 1, wherein the pulse width of the pulse signal ranges from picosecond stage to millisecond stage.
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| US11205995B2 (en) * | 2020-03-27 | 2021-12-21 | Intel Corporation | Fast start-up crystal oscillator |
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