Multi-band signal generator, RF chip test system, experimental test system

Abstract

The present invention discloses a multi-band signal generating device, a radio frequency chip testing system, and an experimental testing system, wherein the multi-band signal generating device includes: a radio frequency local oscillator signal generating module, the radio frequency local oscillator signal generating module is used to generate a radio frequency local oscillator signal; a power divider, the input end of the power divider is connected to the output end of the radio frequency local oscillator signal generating module, and the power divider has multiple output ends; at least one frequency multiplication branch, each of the frequency multiplication branches includes a frequency multiplier and a first radio frequency filtering and amplifying module connected in sequence, and the frequency multipliers of different frequency multiplication branches have different frequency multiplication times; the input end of each frequency multiplier is connected to the output end of a power divider; a multiple-select-one switch module, the multiple-select-one switch module has multiple first ends and one second end, the output end of each of the first radio frequency filtering and amplifying modules is connected to one of the first ends, and the second end selectively outputs an input signal of the first end.

Description

Technical Field

[0001] The present invention relates to the technical field of semiconductor chip testing, and more particularly to a multi-band signal generating device. Background Art

[0002] RF chips are commonly used in the transmitting and receiving stages of wireless mobile communications. With the increasing complexity of application scenarios and the rapid evolution of mobile communication technology, the number of frequency bands supported by 5G communications has increased to dozens, resulting in a wider range of operating frequency bands supported by RF chips. Testing the performance and service life of RF chips typically requires an RF signal source. However, these RF signal sources are typically frequency-tunable broadband signal generators, which are expensive and bulky, making them inconvenient for chip testing. This is especially true for high-temperature lifespan experiments involving chips, which require providing accurate and stable RF signals to the RF chip for over 1,000 hours of operation.

[0003] In order to solve the current problems, there is an urgent need for a low-cost, accurate frequency, and stable amplitude radio frequency signal generating device to support chip performance verification and reliability testing. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-band signal generating device that can generate radio frequency signals with multiple frequency components and is suitable for high-temperature aging experiments and radio frequency chip testing of radio frequency chips.

[0005] In order to achieve the above object, the present invention provides a multi-band signal generating device, comprising:

[0006] A radio frequency local oscillator signal generating module, wherein the radio frequency local oscillator signal generating module is used to generate a radio frequency local oscillator signal;

[0007] A power divider, wherein the input end of the power divider is connected to the output end of the radio frequency local oscillator signal generating module, and the power divider has multiple output ends;

[0008] At least one frequency multiplication branch, each of the frequency multiplication branches comprising a frequency multiplier and a first radio frequency filtering and amplifying module connected in sequence, the frequency multipliers of different frequency multiplication branches having different frequency multiplication times; an input end of each frequency multiplier is connected to an output end of the power divider;

[0009] A multiple-choice switch module has multiple first ends and one second end, the output end of each of the first radio frequency filtering and amplifying modules is connected to one of the first ends, and the second end selectively outputs an input signal of the first end.

[0010] In an optional solution, the multi-band signal generating device also includes a mixing branch, which includes a mixer, a frequency synthesis module and a second RF filtering and amplifying module; the first input end of the mixer is connected to one of the output ends of the power divider, the second input end of the mixer is connected to the output end of the frequency synthesis module, the output end of the mixer is connected to the input end of the second RF filtering and amplifying module, and the output end of the second RF filtering and amplifying module is connected to the first end of one of the multiple-selection switch modules.

[0011] In an optional solution, the radio frequency local oscillator signal generation module includes:

[0012] A frequency divider and a crystal oscillator, a phase detector, a loop filter, and a voltage-controlled oscillator connected in sequence; wherein the input end of the frequency divider is connected to the voltage-controlled oscillator, the output end is connected to the phase detector, and the frequency divider sends a feedback signal to the phase detector;

[0013] The phase detector compares the reference signal generated by the crystal oscillator with the feedback signal and outputs the difference between the reference signal and the feedback signal to the loop filter, filters out the high-frequency components in the signal, and sends the DC component to the voltage-controlled oscillator to output the radio frequency local oscillator signal.

[0014] In an optional solution, each of the frequency doubling branches further includes a first isolator, and the first isolator is connected between the output end of the power divider and the input end of the frequency multiplier.

[0015] In an optional solution, the mixing branch further includes a second isolator, and the second isolator is connected between the output end of the power divider and the input end of the mixer.

[0016] In an optional solution, the power divider is a four-way power divider, one output end of which is connected to the mixer, and the other three output ends are respectively connected to the frequency multipliers with different frequency multiplication times, and the multiple-choice switch module has four switch branches.

[0017] In an optional solution, the frequency multiplication times of the frequency multiplier are respectively two times, four times, and six times.

[0018] In an optional solution, a radio frequency signal with an adjustable frequency range of 500 MHz is obtained through frequency mixing by the mixer.

[0019] The present invention also provides a radio frequency chip testing system, comprising the multi-frequency signal generating device mentioned above.

[0020] The present invention also provides a high and low temperature aging test system, comprising the multi-frequency signal generating device mentioned above.

[0021] The beneficial effects of the present invention are:

[0022] Compared with the original bulky and heavy broadband adjustable signal source, the present invention can test different types of RF chips and perform high-temperature aging experiments by switching a multiple-choice switch module, greatly improving the efficiency of chip testing and high-temperature reliability experiments; the entire RF signal generating device has a high degree of integration, a small size, and simple external buttons, which increases the simplicity and ease of operation of the test; the generated signal frequency is accurate and pure, and the amplitude is stable, which improves the credibility of RF chip testing and high-temperature aging experiments.

[0023] The present invention has other features and advantages that will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain certain principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

[0025] Figure 1 A circuit structure diagram of a multi-band signal generating device according to an embodiment of the present invention is shown.

[0026] Figure 2 A schematic diagram of the circuit structure of a radio frequency local oscillator signal generating module of a multi-band signal generating device according to an embodiment of the present invention is shown.

[0027] 1-RF local oscillator signal generation module; 2-power divider; 3-frequency multiplier; 4-first RF filter and amplifier module; 5-multiple-choice switch module; 6-mixer; 7-frequency synthesis module; 8-second RF filter and amplifier module; 9-first isolator; 10-second isolator; 11-RF chip. DETAILED DESCRIPTION

[0028] The present invention will be described in more detail below. Although the present invention provides preferred embodiments, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Instead, these embodiments are provided to make the present invention more thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0029] Reference Figure 1 and Figure 2 An embodiment of the present invention provides a multi-band signal generating device, comprising:

[0030] A radio frequency local oscillator signal generating module 1, wherein the radio frequency local oscillator signal generating module 1 is used to generate a radio frequency local oscillator signal;

[0031] A power divider 2, wherein the input end of the power divider 2 is connected to the output end of the RF local oscillator signal generating module 1, and the power divider 2 has multiple output ends;

[0032] At least one frequency doubling branch, each of the frequency doubling branches comprising a frequency multiplier 3 and a first RF filter amplification module 4 connected in sequence, the frequency multipliers of different frequency doubling branches having different frequency multiplication times; the input end of each frequency multiplier 3 is connected to the output end of one of the power dividers 2;

[0033] The multiple-select-one switch module 55 has multiple first ends and one second end. The output end of each of the first RF filtering and amplifying modules 4 is connected to one of the first ends, and the second end selectively outputs an input signal of the first end.

[0034] In this embodiment, the multi-band signal generating device also includes a mixing branch, which includes a mixer 6, a frequency synthesis module 7 and a second RF filtering and amplifying module 8; the first input end of the mixer 6 is connected to one of the output ends of the power divider 2, the second input end of the mixer 6 is connected to the output end of the frequency synthesis module 7, the output end of the mixer 6 is connected to the input end of the second RF filtering and amplifying module 8, and the output end of the second RF filtering and amplifying module 8 is connected to the first end of the multiple-select-one switch module 5.

[0035] In this embodiment, the circuit structure of the RF local oscillator signal generation module 1 adopts a phase-locked loop (PLL) technology solution. The RF local oscillator signal generation module 1 includes a frequency divider, a crystal oscillator, a phase detector, a loop filter, and a voltage-controlled oscillator connected in sequence. The frequency divider has an input connected to the voltage-controlled oscillator and an output connected to the phase detector. The frequency divider sends a feedback signal to the phase detector. The phase detector compares a reference signal generated by the crystal oscillator with the feedback signal and outputs the difference between the reference signal and the feedback signal to the loop filter, which filters out high-frequency components in the signal and sends the DC component to the voltage-controlled oscillator to output the RF local oscillator output signal.

[0036] In this embodiment, each of the frequency multiplication branches further includes a first isolator 9, which is connected between the output of the power divider 2 and the input of the frequency multiplier 3. The frequency mixing branch further includes a second isolator 10, which is connected between the output of the power divider 2 and the input of the mixer 6. The first isolator 9 and the second isolator 10 are used to prevent interference between radio frequency signals and improve isolation.

[0037] In this embodiment, the power divider 2 is a four-way power divider, one of whose output terminals is connected to the mixer 6, and the other three output terminals are connected to the frequency multipliers 3 with different multiplication times. The multi-choice switch module 5 has four switch branches and is a single-pole, four-throw switch. The reference signal generated by the crystal oscillator is 100 MHz, and the frequency division multiple of the frequency divider is 9. This ensures that the input reference signal and the output signal are phase-locked, generating a local oscillator signal with a frequency of 900 MHz and stable amplitude, that is, the signal output by the voltage-controlled oscillator is 900 MHz. The three local oscillator signals with a frequency of 900 MHz pass through the three frequency multipliers 3 with different multiplication times (respectively, a doubler, a quadrupler, and a sextupler), respectively, to generate radio frequency signals with frequency components of 1800 MHz, 3600 MHz, and 5400 MHz. In other embodiments, the frequency multiplication times of the frequency multiplier 3 can be selected according to actual conditions. Another local oscillator signal with a frequency of 900 MHz and an intermediate frequency signal with a range of 500 MHz and adjustable in 10 kHz steps from the frequency synthesis module are mixed by the mixer 6 to produce a frequency-adjustable RF signal between 900 MHz and 1400 MHz. In other embodiments, the frequency of the local oscillator signal and the range of the intermediate frequency signal output by the frequency synthesis module can be selected based on actual conditions. After the four RF signals pass through the RF filtering and power amplification modules, RF signals with a constant amplitude and pure frequency components are obtained. A multiple-choice switch module selects one of the four RF signals as the final output RF signal for testing and high-temperature aging tests of the RF chip 11. The 1800 MHz, 3600 MHz, and 5400 MHz RF signal sources can be used for testing and high-temperature aging tests of RF chips operating in the high-frequency band, while the 900 MHz to 1400 MHz RF signal can be used for testing and high-temperature aging tests of RF chips operating in the low-frequency band.

[0038] The parts selection of this embodiment is shown in Table 1:

[0039] Table 1

[0040]

[0041] Instructions:

[0042] 1. When conducting RF chip testing and high-temperature aging experiments, first turn on the RF switch that is consistent with the operating frequency band of the RF chip and output the corresponding RF signal.

[0043] 2. Then connect the output RF signal to the RF chip test board and provide corresponding DC power supply to perform chip testing and high-temperature aging experiments.

[0044] The present invention generates tunable RF signals with fixed frequency components according to the operating frequencies of different RF chips. The generated RF signals have pure, accurate frequencies and stable amplitudes. This eliminates the need for expensive, bulky signal generators that can only generate one frequency component at a time, reduces the cost of chip testing and high-temperature aging experiments, and offers simplified and convenient operation. The generated RF signals are all within the normal communication operating frequency band of the RF chip.

[0045] Compared with the original bulky and heavy broadband adjustable signal source, the present invention can test different types of RF chips and perform high-temperature aging experiments by switching a multiple-choice switch module, greatly improving the efficiency of chip testing and high-temperature reliability experiments; the entire RF signal generating device has a high degree of integration, a small size, and simple external buttons, which increases the simplicity and ease of operation of the test; the generated signal frequency is accurate and pure, and the amplitude is stable, which improves the credibility of RF chip testing and high-temperature aging experiments.

[0046] Another embodiment of the present invention provides a radio frequency chip testing system, including the above-mentioned multi-frequency signal generating device.

[0047] Yet another embodiment of the present invention provides a high and low temperature aging test system, comprising the above-mentioned multi-frequency signal generating device.

[0048] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A multi-band signal generating device, characterized in that: include: A radio frequency local oscillator signal generating module, wherein the radio frequency local oscillator signal generating module is used to generate a radio frequency local oscillator signal; A power divider, wherein the input end of the power divider is connected to the output end of the radio frequency local oscillator signal generating module, and the power divider has multiple output ends; At least one frequency multiplication branch, each of the frequency multiplication branches comprising a frequency multiplier and a first radio frequency filtering and amplifying module connected in sequence, the frequency multipliers of different frequency multiplication branches having different frequency multiplication times; an input end of each frequency multiplier is connected to an output end of the power divider; a multiple-choice switch module, the multiple-choice switch module having a plurality of first terminals and a second terminal, the output terminal of each of the first radio frequency filtering and amplifying modules being connected to one of the first terminals, and the second terminal selectively outputting an input signal of the first terminal; A mixing branch, the mixing branch comprising a mixer, a frequency synthesis module, and a second RF filtering and amplifying module; a first input end of the mixer is connected to one of the output ends of the power divider, a second input end of the mixer is connected to the output end of the frequency synthesis module, an output end of the mixer is connected to the input end of the second RF filtering and amplifying module, and an output end of the second RF filtering and amplifying module is connected to one of the first ends of the multiple-select-one switch module; The power divider is a four-way power divider, one output end of which is connected to the mixer, and the other three output ends are respectively connected to the frequency multipliers with different frequency multiplication times. The multiple-choice switch module has four switch branches; the frequency multiplication times of the frequency multipliers are respectively two times, four times, and six times.

2. The multi-band signal generating device according to claim 1, wherein: The radio frequency local oscillator signal generating module includes: A frequency divider and a crystal oscillator, a phase detector, a loop filter, and a voltage-controlled oscillator connected in sequence; wherein the input end of the frequency divider is connected to the voltage-controlled oscillator, the output end is connected to the phase detector, and the frequency divider sends a feedback signal to the phase detector; The phase detector compares the reference signal generated by the crystal oscillator with the feedback signal and outputs the difference between the reference signal and the feedback signal to the loop filter, filters out the high-frequency components in the signal, and sends the DC component to the voltage-controlled oscillator to output the radio frequency local oscillator signal.

3. The multi-band signal generating device according to claim 1, wherein: Each of the frequency multiplying branches further includes a first isolator connected between the output end of the power divider and the input end of the frequency multiplier.

4. The multi-band signal generating device according to claim 1, wherein: The mixing branch further includes a second isolator connected between the output end of the power divider and the input end of the mixer.

5. The multi-band signal generating device according to claim 1, wherein: The mixer is used to mix the signals to obtain a radio frequency signal with an adjustable frequency range of 500 MHz.

6. A radio frequency chip testing system, comprising the multi-band signal generating device according to any one of claims 1 to 5.

7. A high and low temperature aging test system, comprising the multi-band signal generating device according to any one of claims 1 to 6.

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