A signal processing device and an oscilloscope
By using a series structure of signal generation module, amplitude and frequency adjustment module and signal conversion module, the problem of optimizing radio frequency signal frequency and noise level is solved, and high-quality radio frequency signal generation is achieved to meet the requirements of high-precision signal use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-12
AI Technical Summary
Existing signal processing techniques struggle to simultaneously optimize the frequency, gain, and noise levels of radio frequency (RF) signals, resulting in RF signals that fail to meet ideal performance standards and impacting signal quality.
The system employs a series structure of a signal generation module, an amplitude and frequency adjustment module, and a signal conversion module. Through multi-stage amplitude and frequency adjustment, it converts the initial single-ended RF signal into a target differential RF signal. The system includes a crystal oscillator, multiple amplitude and frequency adjustment units, and a signal conversion module. Balun and differential filters are used for filtering and conversion.
It enables multi-level amplitude and frequency adjustment of radio frequency signals, improves signal quality, meets the requirements of high-precision signal usage environments, and optimizes frequency, gain, and noise levels.
Smart Images
Figure CN122193661A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of signal processing technology, and in particular to a signal processing device and an oscilloscope. Background Technology
[0002] In modern communication technology, the frequency, amplitude, and noise immunity of radio frequency (RF) signals are key factors determining signal quality. An ideal RF signal requires precise frequency control, sufficient amplitude, and a low noise level to meet signal modulation requirements. However, related signal processing techniques still face numerous challenges in matching these critical parameters. Because it is difficult to simultaneously optimize frequency, gain, and noise levels, the generated RF signals often fail to meet ideal performance standards, resulting in low signal quality and severely impacting their usability. Therefore, how to modulate high-quality RF signals that meet the requirements has become an urgent technical problem to be solved. Summary of the Invention
[0003] To address at least one of the aforementioned technical problems, this disclosure provides a signal processing device and an oscilloscope.
[0004] The aforementioned signal processing device includes: a signal generation module, an amplitude-frequency adjustment module, and a signal conversion module; the output terminal of the signal generation module is connected to the input terminal of the amplitude-frequency adjustment module, and the output terminal of the amplitude-frequency adjustment module is connected to the input terminal of the signal conversion module. The signal generation module is used to generate the initial single-ended radio frequency signal; The amplitude and frequency adjustment module is used to perform multi-level amplitude and frequency adjustment on the initial single-ended radio frequency signal to obtain the target radio frequency signal, which is a single-ended radio frequency signal with target amplitude and target frequency. The signal conversion module is used to convert the target radio frequency signal into a differential radio frequency signal.
[0005] In an optional embodiment, the signal conversion module includes: a single-ended differential conversion unit and a filtering unit; the input terminal of the single-ended differential conversion unit is connected to the output terminal of the amplitude-frequency adjustment module, and the output terminal of the single-ended differential conversion unit is connected to the input terminal of the filtering unit. The single-ended differential conversion unit is used to convert the target radio frequency signal from single-ended form to differential form to obtain a differential radio frequency signal; The filtering unit is used to filter the differential form of the radio frequency signal to obtain the differential radio frequency signal.
[0006] In an optional embodiment, the single-ended differential conversion unit is a balun, and the first filtering unit is a differential filter; The signal conversion module is a packaged module that integrates a balun and a differential filter.
[0007] In an optional embodiment, the amplitude-frequency adjustment module includes a plurality of amplitude-frequency adjustment units connected in series. Each amplitude-frequency adjustment unit is used to perform amplitude adjustment processing on the received radio frequency signal to obtain an amplitude-amplified radio frequency signal, and then perform frequency adjustment processing on the amplitude-amplified radio frequency signal to obtain a frequency-increased radio frequency signal.
[0008] In an optional embodiment, the plurality of amplitude and frequency adjustment units include: a first amplitude and frequency adjustment unit and a second amplitude and frequency adjustment unit; the first amplitude and frequency adjustment unit includes a first amplitude adjustment subunit and a first frequency adjustment subunit, and the second amplitude and frequency adjustment unit includes a second amplitude adjustment subunit and a second frequency adjustment subunit; the input terminal of the first amplitude adjustment subunit is connected to the output terminal of the signal generation module, the output terminal of the first amplitude adjustment subunit is connected to the input terminal of the first frequency adjustment subunit, the output terminal of the first frequency adjustment subunit is connected to the input terminal of the second amplitude adjustment subunit, the output terminal of the second amplitude adjustment subunit is connected to the input terminal of the second frequency adjustment subunit, and the output terminal of the second frequency adjustment subunit is connected to the input terminal of the signal conversion module; The first amplitude adjustment subunit is used to perform amplitude adjustment processing on the initial single-ended radio frequency signal to obtain a first radio frequency signal, the amplitude of which is greater than the amplitude of the initial single-ended radio frequency signal. The first frequency adjustment subunit is used to perform frequency adjustment processing on the first radio frequency signal to obtain a second radio frequency signal, wherein the frequency of the second radio frequency signal is higher than the frequency of the first radio frequency signal. The second amplitude adjustment subunit is used to perform amplitude adjustment processing on the second radio frequency signal to obtain a third radio frequency signal, the amplitude of which is greater than that of the second radio frequency signal. The second frequency adjustment subunit is used to perform frequency multiplication on the third radio frequency signal to obtain the target radio frequency signal, the frequency of which is higher than that of the third radio frequency signal.
[0009] In an optional embodiment, the first amplitude adjustment subunit includes a pre-filter, a first radio frequency amplifier, and a post-filter; The input terminal of the pre-filter is connected to the output terminal of the signal generation module, the output terminal of the pre-filter is connected to the input terminal of the first RF amplifier, the output terminal of the first RF amplifier is connected to the input terminal of the post-filter, and the output terminal of the post-filter is connected to the input terminal of the first frequency adjustment subunit.
[0010] In an optional embodiment, the first frequency adjustment subunit includes a first phase-locked loop, a second phase-locked loop, and a first frequency multiplier; The input terminal of the first phase-locked loop is connected to the output terminal of the first amplitude adjustment subunit. The output terminal of the first phase-locked loop is connected to the input terminal of the second phase-locked loop. The output terminal of the second phase-locked loop is connected to the input terminal of the first frequency multiplier. The output terminal of the first frequency multiplier is connected to the input terminal of the second amplitude adjustment subunit.
[0011] In an optional embodiment, the second amplitude adjustment subunit includes a first bandpass filter, a step-adjustable attenuator, a second radio frequency amplifier, and a second bandpass filter; The input of the first bandpass filter is connected to the output of the first frequency adjustment subunit. The output of the first bandpass filter is connected to the input of the step-adjustable attenuator. The output of the step-adjustable attenuator is connected to the input of the second RF amplifier. The output of the second RF amplifier is connected to the input of the second bandpass filter. The output of the second bandpass filter is connected to the input of the second frequency adjustment subunit.
[0012] In an optional embodiment, the second frequency adjustment subunit includes a second frequency multiplier; The input of the second frequency multiplier is connected to the output of the second amplitude adjustment subunit, and the output of the second frequency multiplier is connected to the input of the signal conversion module.
[0013] In an optional embodiment, the apparatus further includes: a sampling module; The clock signal input terminal of the sampling module is connected to the output terminal of the signal conversion module. The sampling module is used to perform analog-to-digital conversion on the signal to be sampled based on the differential radio frequency signal to obtain the target digital signal.
[0014] In an optional embodiment, the signal generation module is a crystal oscillator element; The signal output terminal of the crystal oscillator is connected to the input terminal of the amplitude and frequency adjustment module.
[0015] Secondly, this disclosure also provides an oscilloscope in which the above-mentioned signal processing device is provided.
[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.
[0017] Implementing this disclosure will have the following beneficial effects: The signal processing device includes: a signal generation module, an amplitude-frequency adjustment module, and a signal conversion module; the output of the signal generation module is connected to the input of the amplitude-frequency adjustment module, and the output of the amplitude-frequency adjustment module is connected to the input of the signal conversion module; the signal generation module is used to generate an initial single-ended radio frequency signal; the amplitude-frequency adjustment module is used to perform multi-level amplitude and frequency adjustment on the initial single-ended radio frequency signal to obtain a target radio frequency signal, which is a single-ended radio frequency signal with a target amplitude and a target frequency; the signal conversion module is used to convert the target radio frequency signal into a differential radio frequency signal.
[0018] This disclosure, through a series-connected signal generation module, amplitude and frequency adjustment module, and signal conversion module, enables multi-level amplitude and frequency adjustment of the generated radio frequency signal and conversion of the adjusted radio frequency signal into differential form, thus completing the modulation of a single-frequency differential radio frequency signal. The multi-level amplitude and frequency adjustment and differential form conversion achieved through the cooperation of the modules in this disclosure can meet the requirements for the amplitude, frequency, and noise immunity of the radio frequency signal, improve the quality of the processed signal, and meet the usage requirements in high-precision signal environments.
[0019] Other features and aspects of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0020] To more clearly illustrate the technical solutions and advantages in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The accompanying drawings are incorporated in and constitute a part of this specification, illustrating embodiments consistent with this disclosure, and are used together with the description to explain the principles of this disclosure, and do not constitute an improper limitation of this disclosure.
[0021] Figure 1 This is a schematic diagram illustrating a signal processing apparatus according to an exemplary embodiment; Figure 2 This is a block diagram illustrating a detailed structure of a signal generation module according to an exemplary embodiment; Figure 3 This is a block diagram illustrating a detailed structure of an amplitude-frequency adjustment module according to an exemplary embodiment; Figure 4 This is a block diagram illustrating a detailed structure of a first amplitude adjustment subunit according to an exemplary embodiment; Figure 5This is a block diagram illustrating a detailed structure of a first frequency adjustment subunit according to an exemplary embodiment; Figure 6 This is a block diagram illustrating a detailed structure of a second amplitude adjustment subunit according to an exemplary embodiment; Figure 7 This is a block diagram illustrating a detailed structure of a second frequency adjustment subunit according to an exemplary embodiment; Figure 8 This is a block diagram illustrating a detailed structure of a signal conversion module according to an exemplary embodiment; Figure 9 This is a schematic diagram of the integrated structure of a signal conversion module according to an exemplary embodiment; Figure 10 This is a block diagram illustrating a detailed structure of a sampling module according to an exemplary embodiment; Figure 11 This is a block diagram illustrating a clock link for implementing 16GHz low phase noise sampling according to an exemplary embodiment; Figure 12 This is a schematic diagram illustrating the insertion loss parameters of a packaged module integrating a 16GHz balun and a differential filter according to an exemplary embodiment. Figure 13 This is a schematic diagram illustrating the return loss parameters of a packaged module integrating a 16GHz balun and a differential filter according to an exemplary embodiment. Figure 14 This is a schematic diagram illustrating the measurement results of a 16GHz single-frequency differential radio frequency signal according to an exemplary embodiment; The following is supplementary explanation of the attached figures: 1-Signal generation module; 101-Crystal oscillator; 2-Amplitude and frequency adjustment module; 201-First amplitude adjustment subunit; 2011-Pre-filter; 2012-First RF amplifier; 2013-Post-filter; 202-First frequency adjustment subunit; 2021-First phase-locked loop; 2022-Second phase-locked loop; 2023-First frequency multiplier; 203-Second amplitude adjustment subunit; 2031-First bandpass filter; 2032-Step adjustable attenuator; 2033-Second RF amplifier; 2034-Second bandpass filter; 204-Second frequency adjustment subunit; 2041-Second frequency multiplier; 3-Signal conversion module; 301-Single-ended differential conversion unit; 3011-Balon; 302-Filtering unit; 3021-Differential filter; 4-Sampling module; 401-Sample-and-hold chip. Detailed Implementation
[0022] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.
[0024] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise. The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.
[0025] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.
[0026] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.
[0027] To improve signal processing quality and optimize signal frequency, amplitude, and noise levels, embodiments of this disclosure provide a signal processing apparatus and an oscilloscope.
[0028] Figure 1 This is a schematic diagram of a signal processing apparatus according to an exemplary embodiment, such as... Figure 1 As shown, the signal processing device includes: a signal generation module 1, an amplitude-frequency adjustment module 2, and a signal conversion module 3; the output terminal of the signal generation module 1 is connected to the input terminal of the amplitude-frequency adjustment module 2, and the output terminal of the amplitude-frequency adjustment module 2 is connected to the input terminal of the signal conversion module 3. Signal generation module 1 is used to generate an initial single-ended radio frequency signal; amplitude and frequency adjustment module 2 is used to perform multi-level amplitude and frequency adjustment on the initial single-ended radio frequency signal to obtain a target radio frequency signal, which is a single-ended radio frequency signal with a target amplitude and a target frequency; signal conversion module 3 is used to convert the target radio frequency signal into a differential radio frequency signal.
[0029] In this embodiment, the signal generation module 1, the amplitude-frequency adjustment module 2, and the signal conversion module 3 are connected in series. The initial single-ended radio frequency signal generated by the signal generation module 1 is transmitted to the amplitude-frequency adjustment module 2 through the output terminal of the signal generation module 1. The amplitude-frequency adjustment module 2 performs multi-level amplitude and frequency adjustment to modulate the initial single-ended radio frequency signal into a target radio frequency signal with a target amplitude and target frequency. The target radio frequency signal is transmitted to the signal conversion module 3 through the output terminal of the amplitude-frequency adjustment module 2. The signal conversion module 3 performs single-ended to differential conversion and outputs the converted differential radio frequency signal from the output terminal of the signal conversion module 3.
[0030] As can be seen from the above, in this embodiment of the present disclosure, the signal generation module, amplitude and frequency adjustment module, and signal conversion module connected in series can realize multi-level amplitude and frequency adjustment of the generated radio frequency signal and conversion of the adjusted radio frequency signal into differential form, thereby completing the modulation of single-frequency differential radio frequency signal. Through the multi-level amplitude and frequency adjustment and conversion to differential form processing performed by the cooperation between the modules of this disclosure, the requirements for amplitude, frequency, and noise immunity of radio frequency signal can be met, the quality of the processed signal can be improved, and the usage requirements in high-precision signal usage environments can be met.
[0031] Figure 2 This is a block diagram illustrating a detailed structure of a signal generation module according to an exemplary embodiment. In an alternative embodiment, such as... Figure 2 As shown, the signal generation module 1 is a crystal oscillator 101; the signal output terminal of the crystal oscillator 101 is connected to the input terminal of the amplitude and frequency adjustment module 2.
[0032] In this embodiment, a crystal oscillator 101 is used to generate the initial single-ended radio frequency signal, which enables the initial signal to have low phase noise and low jitter characteristics. For example, the crystal oscillator 101 in this embodiment can be a 10MHz crystal oscillator, and the radio frequency signal it generates is 10MHz. This embodiment does not limit the selection of the crystal oscillator 101; for example, the crystal oscillator 101 can be a simple packaged crystal oscillator (SPXO), a temperature-compensated crystal oscillator (OCXO), or a temperature-compensated crystal oscillator (TCXO), etc.
[0033] As can be seen from the above, in this embodiment of the present disclosure, the initial single-ended radio frequency signal generated by the crystal oscillator can be made to have the characteristics of low phase noise and low jitter, so as to provide a highly stable and high-quality single-ended radio frequency signal to be modulated for the subsequent signal modulation process.
[0034] In an optional embodiment, the amplitude-frequency adjustment module 2 includes a plurality of amplitude-frequency adjustment units connected in series; each amplitude-frequency adjustment unit is used to perform amplitude adjustment processing on the received radio frequency signal to obtain an amplitude-amplified radio frequency signal, and to perform frequency adjustment processing on the amplitude-amplified radio frequency signal to obtain a frequency-increased radio frequency signal.
[0035] In this embodiment, the multiple amplitude-frequency adjustment units are connected as follows: the input terminal of the first amplitude-frequency adjustment unit is connected to the output terminal of the signal generation module 1; the output terminal of the preceding amplitude-frequency adjustment unit in any two adjacent amplitude-frequency adjustment units is connected to the input terminal of the following amplitude-frequency adjustment unit; and the output terminal of the last amplitude-frequency adjustment unit is connected to the input terminal of the signal conversion module 3. Each amplitude-frequency adjustment unit, upon receiving the output RF signal, first performs amplitude adjustment processing on the received RF signal to obtain an amplified RF signal, and then performs frequency adjustment processing on the amplified RF signal to obtain a frequency-increased RF signal. This embodiment, through the sequentially connected multiple amplitude-frequency adjustment units, enables the interleaving of amplitude and frequency adjustments, ultimately achieving multi-level amplitude and frequency adjustments.
[0036] As can be seen from the above, the embodiments of this disclosure provide multiple amplitude and frequency adjustment units connected in series. Each amplitude and frequency adjustment unit can sequentially perform amplitude and frequency adjustment processing on the received radio frequency signal, thereby achieving multi-level amplitude and frequency adjustment of the radio frequency signal, meeting the requirements of amplitude, frequency and noise immunity of the radio frequency signal, and reducing signal noise.
[0037] Figure 3This is a block diagram illustrating a detailed structure including an amplitude-frequency adjustment module according to an exemplary embodiment. In an alternative embodiment, such as... Figure 3 As shown, the multiple amplitude and frequency adjustment units include: a first amplitude and frequency adjustment unit and a second amplitude and frequency adjustment unit; the first amplitude and frequency adjustment unit includes a first amplitude adjustment subunit 201 and a first frequency adjustment subunit 202, and the second amplitude and frequency adjustment unit includes a second amplitude adjustment subunit 203 and a second frequency adjustment subunit 204; the input terminal of the first amplitude adjustment subunit 201 is connected to the output terminal of the signal generation module 1, the output terminal of the first amplitude adjustment subunit 201 is connected to the input terminal of the first frequency adjustment subunit 202, the output terminal of the first frequency adjustment subunit 202 is connected to the input terminal of the second amplitude adjustment subunit 203, the output terminal of the second amplitude adjustment subunit 203 is connected to the input terminal of the second frequency adjustment subunit 204, and the output terminal of the second frequency adjustment subunit 204 is connected to the input terminal of the signal conversion module 3; The first amplitude adjustment subunit 201 is used to perform amplitude adjustment processing on the initial single-ended radio frequency signal to obtain a first radio frequency signal, the amplitude of which is greater than that of the initial single-ended radio frequency signal; the first frequency adjustment subunit 202 is used to perform frequency adjustment processing on the first radio frequency signal to obtain a second radio frequency signal, the frequency of which is higher than that of the first radio frequency signal; the second amplitude adjustment subunit 203 is used to perform amplitude adjustment processing on the second radio frequency signal to obtain a third radio frequency signal, the amplitude of which is greater than that of the second radio frequency signal; the second frequency adjustment subunit 204 is used to perform frequency multiplication processing on the third radio frequency signal to obtain a target radio frequency signal, the frequency of which is higher than that of the third radio frequency signal.
[0038] In this embodiment, the first amplitude adjustment subunit 201, the first frequency adjustment subunit 202, the second amplitude adjustment subunit 203, and the second frequency adjustment subunit 204 are connected in series. The initial single-ended radio frequency signal generated by the signal generation module 1 is transmitted to the first amplitude adjustment subunit 201 through the output terminal of the signal generation module 1. The first amplitude adjustment subunit 201 performs the first amplitude adjustment processing to modulate the initial single-ended radio frequency signal into a first radio frequency signal. The first radio frequency signal is transmitted to the first frequency adjustment subunit 202 through the output terminal of the first amplitude adjustment subunit 201. The first frequency adjustment subunit 202 performs the first frequency adjustment processing to modulate the first radio frequency signal into a second radio frequency signal. The second radio frequency signal is transmitted to the second amplitude adjustment subunit 203 through the output terminal of the first frequency adjustment subunit 202. The second amplitude adjustment subunit 203 performs the second amplitude adjustment processing to modulate the second radio frequency signal into a third radio frequency signal. The third radio frequency signal is transmitted to the second frequency adjustment subunit 204 through the output terminal of the second amplitude adjustment subunit 203. The second frequency adjustment subunit 204 performs the second frequency adjustment processing to modulate the third radio frequency signal into a target radio frequency signal.
[0039] The amplitude adjustment processes performed by the first amplitude adjustment subunit 201 and the second amplitude adjustment subunit 203 each include amplitude compensation and filtering of the received radio frequency signal to compensate for amplitude loss in the signal modulation link and reduce signal noise, so as to ensure that the amplitude of the final amplitude frequency adjustment module 2 output signal meets the signal modulation requirements.
[0040] The frequency adjustment processes performed by the first frequency adjustment subunit 202 and the second frequency adjustment subunit 204 each include frequency amplification of the received radio frequency signal to ensure that the frequency of the final amplitude frequency adjustment module 2 output signal meets the signal modulation requirements.
[0041] As can be seen from the above, in this embodiment of the present disclosure, by sequentially connecting the first amplitude adjustment subunit, the first frequency adjustment subunit, the second amplitude adjustment subunit, and the second frequency adjustment subunit, the amplitude and frequency of the initial single-ended radio frequency signal can be adjusted sequentially, timely compensating for amplitude loss during modulation, shortening the transmission path of the signal after amplitude attenuation in the link, thereby avoiding signal deviation caused by amplitude attenuation under long transmission paths and improving signal quality.
[0042] Figure 4 This is a block diagram illustrating a detailed structure including a first amplitude adjustment subunit according to an exemplary embodiment. In an alternative embodiment, such as Figure 4As shown, the first amplitude adjustment subunit 201 includes a pre-filter 2011, a first radio frequency amplifier 2012, and a post-filter 2013; the input terminal of the pre-filter 2011 is connected to the output terminal of the signal generation module 1, the output terminal of the pre-filter 2011 is connected to the input terminal of the first radio frequency amplifier 2012, the output terminal of the first radio frequency amplifier 2012 is connected to the input terminal of the post-filter 2013, and the output terminal of the post-filter 2013 is connected to the input terminal of the first frequency adjustment subunit 202.
[0043] In this embodiment, the pre-filter 2011, the first RF amplifier 2012, and the post-filter 2013 are connected in series. The signal output terminal of the crystal oscillator 101 is the output terminal of the signal generation module 1. The initial single-ended RF signal generated by the crystal oscillator 101 is transmitted to the pre-filter 2011 via the output terminal of the signal generation module 1. The pre-filter 2011 filters the initial single-ended RF signal to remove noise. The signal filtered by the pre-filter 2011 is transmitted to the first RF amplifier 2012 via its output terminal, where it undergoes initial amplitude amplification. The signal amplified by the first RF amplifier 2012 is transmitted to the post-filter 2013 via its output terminal, where it undergoes filtering to remove harmonics and spurious signals generated by the first RF amplifier 2012, resulting in the first RF signal. The first RF signal is then transmitted to the first frequency adjustment subunit 202 via the output terminal of the post-filter 2013.
[0044] Both the pre-filter 2011 and the post-filter 2013 can be filters constructed from inductors and capacitors. By selecting and configuring the inductors and capacitors, the pre-filter 2011 and the post-filter 2013 can selectively transmit or block signals of specific frequencies. For example, taking the aforementioned 10MHz crystal oscillator as an example, the pre-filter 2011 and the post-filter 2013 constructed from inductors and capacitors can selectively transmit 10MHz radio frequency signals and block signals outside 10MHz from passing through.
[0045] The first radio frequency amplifier 2012 may be a radio frequency amplifier whose operating frequency band covers the frequency corresponding to the initial single-ended radio frequency signal. For example, the first radio frequency amplifier may be a radio frequency amplifier capable of operating in the range from DC to 5 GHz (referred to as a DC-5 GHz amplifier).
[0046] Based on the above, in this embodiment of the present disclosure, the first radio frequency amplifier can amplify the radio frequency signal. By setting filters before and after the first radio frequency amplifier, the pre-filter can filter out noise in the radio frequency signal before it enters the first radio frequency amplifier, reducing the possibility of noise entering the amplifier. The post-filter suppresses harmonics and spurious signals generated after processing by the first radio frequency amplifier. The combined use of the pre-filter, the first radio frequency amplifier, and the post-filter improves the purity of the signal after amplitude adjustment processing.
[0047] Figure 5 This is a block diagram illustrating a detailed structure including a first frequency adjustment subunit according to an exemplary embodiment. In an alternative embodiment, such as... Figure 5 As shown, the first frequency adjustment subunit 202 includes a first phase-locked loop 2021, a second phase-locked loop 2022, and a first frequency multiplier 2023; the input terminal of the first phase-locked loop 2021 is connected to the output terminal of the first amplitude adjustment subunit 201, the output terminal of the first phase-locked loop 2021 is connected to the input terminal of the second phase-locked loop 2022, the output terminal of the second phase-locked loop 2022 is connected to the input terminal of the first frequency multiplier 2023, and the output terminal of the first frequency multiplier 2023 is connected to the input terminal of the second amplitude adjustment subunit 203.
[0048] In this embodiment of the present disclosure, the first phase-locked loop 2021, the second phase-locked loop 2022, and the first frequency multiplier 2023 are connected in series. The output of the post-filter 2013 is also the output of the first amplitude adjustment subunit 201. The first radio frequency signal output from the post-filter 2013 is transmitted to the first phase-locked loop 2021 via the output of the post-filter 2013. The first phase-locked loop 2021 performs the first frequency conversion on the first radio frequency signal, locking the frequency of the first radio frequency signal to a multiple of the first radio frequency signal frequency. The signal processed by the first phase-locked loop 2021 is transmitted to the second phase-locked loop 2022 via the output of the first phase-locked loop 2021. The second phase-locked loop 2022 performs the second frequency conversion, locking the frequency of the signal processed by the first phase-locked loop 2021 to a multiple of the signal frequency. The signal processed by the second phase-locked loop 2022 is transmitted to the first frequency multiplier 2023 via the output of the second phase-locked loop 2022. The first frequency multiplier 2023 multiplies the frequency to obtain the second radio frequency signal. The second radio frequency signal is transmitted to the second amplitude adjustment subunit 203 via the output of the first frequency multiplier 2023.
[0049] The first phase-locked loop 2021 mainly consists of a voltage-controlled crystal oscillator (VCXO), a phase-frequency detector (PFD), and a loop filter, used to adjust the frequency of the output signal by a factor of 1. This embodiment does not limit the frequency adjustment factor of the first phase-locked loop 2021. For example, taking a 10MHz radio frequency signal generated by the aforementioned 10MHz crystal oscillator as an example, the first phase-locked loop 2021 can be a 100MHz phase-locked loop, that is, the input signal frequency of the first phase-locked loop is 10MHz, and the output signal frequency is 100MHz, realizing the frequency conversion of the radio frequency signal from 10MHz to 100MHz.
[0050] The second phase-locked loop 2022 mainly consists of a voltage-controlled oscillator (VCO), a phase-frequency detector (PFD), and a loop filter, used to adjust the frequency of the output signal by a factor of 1. This embodiment does not limit the frequency adjustment factor of the second phase-locked loop 2022. For example, taking the 100MHz radio frequency signal output from the aforementioned first phase-locked loop 2021 as an example, the second phase-locked loop 2022 can be a 4GHz phase-locked loop, meaning the input signal frequency of the second phase-locked loop is 100MHz and the output signal frequency is 4GHz, realizing the frequency conversion of the radio frequency signal from 100MHz to 4GHz.
[0051] The first frequency multiplier 2023 can be a double frequency multiplier. For example, taking the 4GHz radio frequency signal output by the aforementioned second phase-locked loop 2022 as an example, the input signal frequency of the first frequency multiplier is 4GHz and the output signal frequency is 8GHz, thereby realizing the frequency multiplication of the radio frequency signal from 4GHz to 8GHz.
[0052] Based on the above, in this embodiment of the present disclosure, by setting a first phase-locked loop and a second phase-locked loop, the phase-locking function of the first and second phase-locked loops can lock the lower frequency radio frequency signal to a higher precision and frequency radio frequency signal at the front end of the link, providing a high-quality frequency-amplified radio frequency signal for subsequent links; by setting a first frequency multiplier, the frequency-amplified radio frequency signal can be frequency-multiplied in the high-frequency stage to obtain a higher frequency radio frequency signal; the combined use of the first phase-locked loop, the second phase-locked loop and the first frequency multiplier can balance the amplification requirements of signals in each frequency band.
[0053] Figure 6 This is a block diagram illustrating a detailed structure including a second amplitude adjustment subunit according to an exemplary embodiment. In an alternative embodiment, such as... Figure 6As shown, the second amplitude adjustment subunit 203 includes a first bandpass filter 2031, a step-adjustable attenuator 2032, a second RF amplifier 2033, and a second bandpass filter 2034. The input terminal of the first bandpass filter 2031 is connected to the output terminal of the first frequency adjustment subunit 202, the output terminal of the first bandpass filter 2031 is connected to the input terminal of the step-adjustable attenuator 2032, the output terminal of the step-adjustable attenuator 2032 is connected to the input terminal of the second RF amplifier 2033, the output terminal of the second RF amplifier 2033 is connected to the input terminal of the second bandpass filter 2034, and the output terminal of the second bandpass filter 2034 is connected to the input terminal of the second frequency adjustment subunit 204.
[0054] In this embodiment, the first bandpass filter 2031, the step-adjustable attenuator 2032, the second RF amplifier 2033, and the second bandpass filter 2034 are connected in series. The output of the first frequency multiplier 2023 is the output of the first frequency adjustment subunit 202. The first RF signal output by the first frequency multiplier 2023 is transmitted to the first bandpass filter 2031 via the output of the first frequency multiplier 2023. The first bandpass filter 2031 performs bandpass filtering on the first RF signal, filtering out noise signals other than specific frequencies in the first RF signal. The signal filtered by the first bandpass filter 2031 is transmitted to the step-adjustable attenuator 2032 via the output of the first bandpass filter 2031. The step-adjustable attenuator 2032 performs amplitude adjustment. The amplitude of the signal after amplitude adjustment by the step-adjustable attenuator 2034 is adjusted. The adjusted signal is transmitted from the output of the step-adjustable attenuator 2032 to the second RF amplifier 2033, where it undergoes amplitude amplification. The signal after amplitude adjustment by the second RF amplifier 2033 is then transmitted from its output to the second bandpass filter 2034. The second bandpass filter 2034 performs bandpass filtering on the signal output by the second RF amplifier 2033, filtering out harmonics and spurious signals generated during the amplitude adjustment process to obtain the third RF signal. The third RF signal is then transmitted from the output of the second RF amplifier 2033 to the second frequency adjustment subunit 204.
[0055] Taking the 8GHz radio frequency signal output by the aforementioned first frequency multiplier 2023 as an example, the first bandpass filter 2031 and the second bandpass filter 2034 are both 8GHz bandpass filters, which can selectively transmit 8GHz radio frequency signals and block signals outside 8GHz from passing through.
[0056] The step-adjustable attenuator 2032 can work with the second RF amplifier 2033 to adjust the amplitude. When the amplitude compensation of the second RF amplifier 2033 is insufficient, the amplitude compensation can be achieved by the step-adjustable attenuator 2032. When the amplitude compensation of the second RF amplifier 2033 is too large, the amplitude attenuation can be achieved by the step-adjustable attenuator 2032 to balance the amplitude of the signal.
[0057] The second RF amplifier 2033 may be an RF amplifier operating in a frequency band covering 8 GHz. For example, the second RF amplifier may be an RF amplifier capable of operating in the range of 5 GHz to 11 GHz (referred to as a 5-11 GHz amplifier).
[0058] Based on the above, in this embodiment of the present disclosure, by setting a step-adjustable attenuator and a second RF amplifier, the amplitude adjustment performed by the second RF amplifier can be balanced by the adjustment function of the step-adjustable attenuator. This limits signals that may have excessive amplitude or amplifies signals with insufficient amplitude. Through the combined use of the second RF amplifier and the step-adjustable attenuator, the amplitude of high-frequency signals can be effectively controlled at the back end of the link, resulting in higher accuracy of the signal amplitude. By setting bandpass filters at the beginning and end of the second amplitude adjustment subunit, the first bandpass filter can filter out noise outside a specific frequency before the RF signal enters the step-adjustable attenuator, reducing the possibility of noise entering the attenuator. The second bandpass filter suppresses harmonics and spurious signals generated after processing by the second RF amplifier. The combined use of the first bandpass filter, the step-adjustable attenuator, the second RF amplifier, and the first bandpass filter improves the purity of the signal after amplitude adjustment processing.
[0059] Figure 7 This is a block diagram illustrating a detailed structure including a second frequency adjustment subunit according to an exemplary embodiment. In an alternative embodiment, such as... Figure 7 As shown, the second frequency adjustment subunit 204 includes a second frequency multiplier 2041; the input terminal of the second frequency multiplier 2041 is connected to the output terminal of the second amplitude adjustment subunit 203, and the output terminal of the second frequency multiplier 2041 is connected to the input terminal of the signal conversion module 3.
[0060] In this embodiment, the output of the second bandpass filter 2034 is the output of the second amplitude adjustment subunit 203. The third radio frequency signal output from the second bandpass filter 2034 is transmitted to the second frequency multiplier 2041 through the output of the second bandpass filter 2034. The second frequency multiplier 2041 multiplies the frequency to obtain the target radio frequency signal. The target radio frequency signal is transmitted to the signal conversion module 3 through the output of the second frequency multiplier 2041.
[0061] The second frequency multiplier 2041 can be a frequency doubler. For example, taking the 8GHz radio frequency signal output by the aforementioned second bandpass filter 2034 as an example, the input signal frequency of the second frequency multiplier is 8GHz and the output signal frequency is 16GHz, thereby realizing the frequency multiplication of the radio frequency signal from 8GHz to 16GHz.
[0062] As can be seen from the above, by setting a second frequency multiplier in this embodiment, the high-frequency radio frequency signal can be amplified by frequency multiplication at the back end of the link to meet the frequency modulation requirements of the high-frequency radio frequency signal.
[0063] Figure 8 This is a block diagram illustrating a detailed structure of a signal conversion module according to an exemplary embodiment. In an alternative embodiment, such as... Figure 8 As shown, the signal conversion module 3 includes a single-ended differential conversion unit 301 and a filtering unit 302; the input terminal of the single-ended differential conversion unit 301 is connected to the output terminal of the amplitude-frequency adjustment module 2, and the output terminal of the single-ended differential conversion unit 301 is connected to the input terminal of the filtering unit 302. The single-ended differential conversion unit 301 is used to convert the target radio frequency signal from single-ended form to differential form to obtain a differential radio frequency signal; the filtering unit 302 is used to filter the differential radio frequency signal to obtain a differential radio frequency signal.
[0064] In this embodiment, the output of the second frequency multiplier 2041 is the output of the second frequency adjustment subunit 204. The target radio frequency signal output from the second frequency multiplier 2041 is transmitted to the single-ended differential conversion unit 301 through the output of the second frequency multiplier 2041. The single-ended differential conversion unit 301 converts the target radio frequency signal from single-ended form to differential form, converting the target radio frequency signal into a differential form radio frequency signal. The signal processed by the single-ended differential conversion unit 301 is transmitted to the filtering unit 302 through the output of the single-ended differential conversion unit 301. The filtering unit 302 filters the differential form radio frequency signal to reduce signal noise.
[0065] This embodiment does not limit the selection of the single-ended differential conversion unit 301 and the filtering unit 302. For example, the single-ended differential conversion unit 301 can be a single-ended to differential amplifier, a mixer, or a balun, etc.; the filtering unit 302 can be a differential filter.
[0066] As can be seen from the above, in this embodiment of the present disclosure, by setting a single-ended differential conversion unit, a single-ended radio frequency signal can be converted into a differential form of radio frequency signal, thereby improving the signal noise immunity. By setting a single-ended differential conversion unit and a filtering unit in series, the differential form of radio frequency signal can be filtered in a timely manner, thereby reducing noise in the signal.
[0067] Figure 9 This is a schematic diagram illustrating the integrated structure of a signal conversion module according to an exemplary embodiment. In an alternative embodiment, such as... Figure 9 As shown, the single-ended differential conversion unit 301 is a balun 3011, and the first filtering unit 302 is a differential filter 3021; the signal conversion module 3 is a packaged module that integrates the balun 3011 and the differential filter 3021.
[0068] In this embodiment, for the signal conversion module 3, a packaged module integrating a balun 3011 and a differential filter 3021 is selected to further reduce signal loss and noise interference during the signal conversion module 3's processing. Specifically, the packaged module integrates the balun 3011 and the differential filter 3021 onto a ceramic substrate using gold wire bonding and surface mount TiW (titanium tungsten) / Ni (nickel) / Au (gold) processes. The thickness of the metal layer deposited by the TiW / Ni / Au process is typically 0.5-8 μm, and in this embodiment, 4 μm is used. The ceramic substrate is a superstrate 996 alumina ceramic substrate with a thickness typically 0.127-0.762 mm, and in this embodiment, 0.127 mm is used. The routing of the balun 3011 and the differential filter 3021 can be configured using a high-speed PCB layout to ensure the shortest signal path and reduce signal transmission delay and interference. The packaged module in this embodiment can withstand a maximum temperature of 380°C.
[0069] Taking the 16GHz radio frequency signal output by the aforementioned second frequency multiplier 2041 as an example, the balun 3011 is a balun with an operating frequency covering 16GHz, and the differential filter 3021 is a differential filter capable of filtering the 16GHz radio frequency signal. Figure 9 As shown, the signal input terminal of the balun 3011 is the input terminal of the signal conversion module. The differential output terminal of the balun 3011 is connected to the differential input terminal of the differential filter 3021, and the differential output terminal of the differential filter 3021 is the output terminal of the signal conversion module.
[0070] As can be seen from the above, by integrating the balun and differential filter in this embodiment, the signal can be processed sequentially by the integrated balun and differential filter, thereby achieving low loss and low noise interference in the signal processing process and improving the quality and stability of the processed signal.
[0071] Figure 10 This is a block diagram illustrating a detailed structure of a sampling module according to an exemplary embodiment. In an alternative embodiment, such as... Figure 10As shown, the device also includes: a sampling module 4; the clock signal input terminal of the sampling module 4 is connected to the output terminal of the signal conversion module 3, and the sampling module 4 is used to perform analog-to-digital conversion processing on the signal to be sampled based on the differential radio frequency signal to obtain the target digital signal.
[0072] In this embodiment, the differential radio frequency signal obtained after the aforementioned processing can be used as a sampling clock signal for signal sampling, providing a reliable and stable sampling clock signal for analog-to-digital conversion, thus maintaining the instantaneous value of the signal to be sampled stable during analog-to-digital conversion and ensuring the accuracy of the analog-to-digital conversion. The differential output terminal of the differential filter 3021 is the output terminal of the signal conversion module 3, and the differential radio frequency signal is input to the sampling module 4 through the differential output terminal of the differential filter 3021.
[0073] The sampling module 4 includes a sample-and-hold chip 401. The sampling clock signal input terminal of the sample-and-hold chip 401 is also the clock signal input terminal of the sampling module 4. The signal to be sampled is an analog signal. The analog signal input terminal of the sample-and-hold chip 401 is input to the sample-and-hold chip 401. The sample-and-hold chip 401 samples the signal to be sampled based on the differential radio frequency signal, captures and holds the instantaneous value of the signal to be sampled, ensures the accuracy of analog-to-digital conversion, and completes the digitization of the analog signal.
[0074] As can be seen from the above, in this embodiment of the present disclosure, by introducing the differential radio frequency signal obtained above into the clock signal input terminal of the sampling module, the sampling of the signal to be sampled can be completed through a sampling clock signal with low phase noise and low jitter, and discrete signals can be obtained. This provides a guarantee for the subsequent sample-and-hold chip to perform digital encoding and convert it into digital signals, thereby improving the quality of digital signals.
[0075] Figure 11 This is a block diagram illustrating a clock link for implementing 16GHz low phase noise sampling according to an exemplary embodiment.
[0076] In one specific implementation, such as Figure 11 As shown, in order to achieve high-precision sampling of the 32GHz signal to be sampled, a low-phase-noise, low-jitter 16GHz sampling clock signal is required to provide a precise sampling clock for the sample-and-hold chip. The clock link that modulates the 16GHz sampling clock signal includes a 10MHz crystal oscillator, a pre-filter, a DC-5GHz amplifier, a post-filter, a 100MHz phase-locked loop, a 4GHz phase-locked loop, a 4-8GHz frequency multiplier (referring to a frequency doubler that multiplies the 4GHz RF signal to 8GHz), an 8GHz bandpass filter, a step-adjustable attenuator, a 5-11GHz amplifier, an 8GHz bandpass filter, an 8-16GHz frequency multiplier (referring to a frequency doubler that multiplies the 8GHz RF signal to 16GHz), and a package module integrating a 16GHz balun and a differential filter.
[0077] Among them, the packaged module that integrates a 16GHz balun and differential filter has good transmission performance at the 16GHz frequency. Figure 12 This is a schematic diagram illustrating the insertion loss parameters of a packaged module integrating a 16GHz balun and differential filter according to an exemplary embodiment. Insertion loss is a metric used to measure the degree of signal attenuation as it passes through a device or transmission path, such as... Figure 12 As shown, the horizontal axis represents frequency (in GHz), ranging from 0 GHz to 70 GHz, and the vertical axis represents decibels (in dB), ranging from -200 dB to 0 dB. The closer the insertion loss index is to 0, the better the device's performance. At 16 GHz, the insertion loss index is -3.89 dB; at 32 GHz, it is -76.02 dB; and at 64 GHz, it is -31.06 dB. This demonstrates that the packaged module exhibits low attenuation at 16 GHz and possesses good transmission performance. Figure 13 This is a schematic diagram illustrating the return loss parameters of a packaged module integrating a 16GHz balun and differential filter according to an exemplary embodiment. Return loss is a metric used to measure the degree to which a signal is reflected back during transmission due to impedance mismatch or other reasons. Figure 13 As shown, the horizontal axis represents frequency (in GHz), ranging from 0 GHz to 70 GHz, and the vertical axis represents decibels (in dB), ranging from -20 dB to 2.5 dB. The light-colored curve in the figure represents the return loss at the signal input end of the packaged module (i.e., the signal input end of the 16 GHz balun), and the dark-colored curve represents the return loss at the signal output end of the packaged module (i.e., the differential output end of the differential filter). When processing a 16 GHz signal, the return loss at the signal input end of the packaged module is -6.864 dB, and the return loss at the signal output end is -15.023 dB. Therefore, considering the combined return loss performance of the signal input and output ends of the packaged module at different frequencies, this packaged module exhibits good transmission performance at 16 GHz.
[0078] The 16GHz single-frequency differential radio frequency signal modulated by the components connected in series above has the characteristics of stable frequency and amplitude, and low phase noise and low jitter. The 16GHz single-frequency differential radio frequency signal modulated by the components connected in series above is finally used as the sampling clock signal, and is differentially input to the sample-and-hold chip to complete the signal sampling.
[0079] Figure 14 This is a schematic diagram illustrating the measurement results of a 16GHz single-frequency differential radio frequency signal according to an exemplary embodiment. Figure 14 As shown, the horizontal axis represents the frequency offset, ranging from 10kHz to 100MHz, and the vertical axis represents the phase noise, ranging from -140dBc / Hz to -95dBc / Hz.
[0080] When the modulated differential radio frequency signal is a single 16 GHz frequency with an output amplitude of 0 dBm... Figure 14 Five measurement points were selected within an integration bandwidth of 10kHz-80MHz, denoted as SN1, SN2, SN3, SN4, and SN5. Measurement point SN1 (10.00kHz, -94.85dBc / Hz) indicates a phase noise of at most -94.85dBc / Hz with a frequency offset of 10.00kHz; measurement point SN2 (100.00kHz, -120.84dBc / Hz) indicates a phase noise of at most -120.84dBc / Hz with a frequency offset of 100.00kHz; measurement point SN3 (1.00MHz, -136.13dBc / Hz) indicates a frequency... With a frequency offset of 1.00MHz, the phase noise is at most -136.13dBc / Hz; measurement point SN4 (10.00MHz, -139.62dBc / Hz) indicates that with a frequency offset of 10.00MHz, the phase noise is at most -139.62dBc / Hz; measurement point SN5 (80.00MHz, -140.83dBc / Hz) indicates that with a frequency offset of 80.00MHz, the phase noise is at most -140.83dBc / Hz. Since a 10kHz frequency offset is a key indicator for measuring the spectral purity of an RF signal, the measurement data from measurement point SN1 shows that the modulated 16GHz single-frequency differential RF signal obtained in this embodiment has good stability.
[0081] like Figure 14 As shown, the phase noise was integrated within a typical RF phase noise analysis bandwidth (i.e., an integration bandwidth of 10kHz-80MHz) from a starting frequency offset of 10kHz to an ending frequency offset, and the resulting jitter index was 21.83fs. It can be seen that the modulated 16GHz single-frequency differential RF signal obtained in this embodiment possesses extremely high accuracy.
[0082] Secondly, this disclosure also provides an oscilloscope in which the above-mentioned signal processing device is provided.
[0083] In this embodiment of the disclosure, the signal processing device described above can be applied to the clock sampling signal channel of a real-time oscilloscope. By performing signal processing through the clock sampling signal channel containing the above-described signal processing device, the sampled high-quality signal can be displayed on the oscilloscope in real time, thereby improving the oscilloscope's performance.
[0084] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.
[0085] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.
Claims
1. A signal processing device, characterized in that, The device includes: a signal generation module (1), an amplitude and frequency adjustment module (2), and a signal conversion module (3); the output terminal of the signal generation module (1) is connected to the input terminal of the amplitude and frequency adjustment module (2), and the output terminal of the amplitude and frequency adjustment module (2) is connected to the input terminal of the signal conversion module (3); The signal generation module (1) is used to generate an initial single-ended radio frequency signal; The amplitude and frequency adjustment module (2) is used to perform multi-level amplitude and frequency adjustment on the initial single-ended radio frequency signal to obtain the target radio frequency signal, wherein the target radio frequency signal is a single-ended radio frequency signal with a target amplitude and a target frequency. The signal conversion module (3) is used to convert the target radio frequency signal into a differential radio frequency signal.
2. The signal processing apparatus according to claim 1, characterized in that, The signal conversion module (3) includes a single-ended differential conversion unit (301) and a filtering unit (302); the input terminal of the single-ended differential conversion unit (301) is connected to the output terminal of the amplitude-frequency adjustment module (2), and the output terminal of the single-ended differential conversion unit (301) is connected to the input terminal of the filtering unit (302); The single-ended differential conversion unit (301) is used to convert the target radio frequency signal from single-ended form to differential form to obtain a differential radio frequency signal; The filtering unit (302) is used to filter the differential form radio frequency signal to obtain the differential radio frequency signal.
3. The signal processing apparatus according to claim 2, characterized in that: The single-ended differential conversion unit (301) is a balun (3011), and the first filtering unit (302) is a differential filter (3021). The signal conversion module (3) is a packaged module that integrates the balun (3011) and the differential filter (3021).
4. The signal processing apparatus according to claim 1, characterized in that: The amplitude and frequency adjustment module (2) includes multiple amplitude and frequency adjustment units connected in series. Each of the amplitude and frequency adjustment units is used to perform amplitude adjustment processing on the received radio frequency signal to obtain an amplitude-amplified radio frequency signal, and to perform frequency adjustment processing on the amplitude-amplified radio frequency signal to obtain a frequency-increased radio frequency signal.
5. The signal processing apparatus according to claim 4, characterized in that, The plurality of amplitude and frequency adjustment units include: a first amplitude and frequency adjustment unit and a second amplitude and frequency adjustment unit; the first amplitude and frequency adjustment unit includes a first amplitude adjustment subunit (201) and a first frequency adjustment subunit (202), and the second amplitude and frequency adjustment unit includes a second amplitude adjustment subunit (203) and a second frequency adjustment subunit (204); the input terminal of the first amplitude adjustment subunit (201) is connected to the output terminal of the signal generation module (1), the output terminal of the first amplitude adjustment subunit (201) is connected to the input terminal of the first frequency adjustment subunit (202), the output terminal of the first frequency adjustment subunit (202) is connected to the input terminal of the second amplitude adjustment subunit (203), the output terminal of the second amplitude adjustment subunit (203) is connected to the input terminal of the second frequency adjustment subunit (204), and the output terminal of the second frequency adjustment subunit (204) is connected to the input terminal of the signal conversion module (3); The first amplitude adjustment subunit (201) is used to perform amplitude adjustment processing on the initial single-ended radio frequency signal to obtain a first radio frequency signal, wherein the amplitude of the first radio frequency signal is greater than the amplitude of the initial single-ended radio frequency signal. The first frequency adjustment subunit (202) is used to perform frequency adjustment processing on the first radio frequency signal to obtain a second radio frequency signal, wherein the frequency of the second radio frequency signal is higher than the frequency of the first radio frequency signal; The second amplitude adjustment subunit (203) is used to perform amplitude adjustment processing on the second radio frequency signal to obtain a third radio frequency signal, wherein the amplitude of the third radio frequency signal is greater than the amplitude of the second radio frequency signal; The second frequency adjustment subunit (202) is used to perform frequency multiplication on the third radio frequency signal to obtain the target radio frequency signal, wherein the frequency of the target radio frequency signal is higher than the frequency of the third radio frequency signal.
6. The signal processing apparatus according to claim 5, characterized in that: The first amplitude adjustment subunit (201) includes a pre-filter (2011), a first radio frequency amplifier (2012), and a post-filter (2013). The input terminal of the pre-filter (2011) is connected to the output terminal of the signal generation module (1), the output terminal of the pre-filter (2011) is connected to the input terminal of the first radio frequency amplifier (2012), the output terminal of the first radio frequency amplifier (2012) is connected to the input terminal of the post-filter (2013), and the output terminal of the post-filter (2013) is connected to the input terminal of the first frequency adjustment subunit (202).
7. The signal processing apparatus according to claim 5, characterized in that: The first frequency adjustment subunit (202) includes a first phase-locked loop (2021), a second phase-locked loop (2022), and a first frequency multiplier (2023). The input terminal of the first phase-locked loop (2021) is connected to the output terminal of the first amplitude adjustment subunit (201), the output terminal of the first phase-locked loop (2021) is connected to the input terminal of the second phase-locked loop (2022), the output terminal of the second phase-locked loop (2022) is connected to the input terminal of the first frequency multiplier (2023), and the output terminal of the first frequency multiplier (2023) is connected to the input terminal of the second amplitude adjustment subunit (203).
8. The signal processing apparatus according to claim 5, characterized in that: The second amplitude adjustment subunit (203) includes a first bandpass filter (2031), a step adjustable attenuator (2032), a second radio frequency amplifier (2033), and a second bandpass filter (2034). The input terminal of the first bandpass filter (2031) is connected to the output terminal of the first frequency adjustment subunit (202), the output terminal of the first bandpass filter (2031) is connected to the input terminal of the step adjustable attenuator (2032), the output terminal of the step adjustable attenuator (2032) is connected to the input terminal of the second radio frequency amplifier (2033), the output terminal of the second radio frequency amplifier (2033) is connected to the input terminal of the second bandpass filter (2034), and the output terminal of the second bandpass filter (2034) is connected to the input terminal of the second frequency adjustment subunit (204).
9. The signal processing apparatus according to claim 5, characterized in that: The second frequency adjustment subunit (204) includes a second frequency multiplier (2041); The input terminal of the second frequency multiplier (2041) is connected to the output terminal of the second amplitude adjustment subunit (203), and the output terminal of the second frequency multiplier (2041) is connected to the input terminal of the signal conversion module (3).
10. The signal processing apparatus according to claim 1, characterized in that, The device further includes: a sampling module (4); The clock signal input terminal of the sampling module (4) is connected to the output terminal of the signal conversion module (3). The sampling module (4) is used to perform analog-to-digital conversion processing on the signal to be sampled based on the differential radio frequency signal to obtain the target digital signal.
11. The signal processing apparatus according to claim 1, characterized in that: The signal generation module (1) is a crystal oscillator (101); The signal output terminal of the crystal oscillator (101) is connected to the input terminal of the amplitude and frequency adjustment module (2).
12. An oscilloscope, characterized in that, The oscilloscope is provided with a signal processing device as described in any one of claims 1-11.