Two-way down-conversion assembly

Abstract

An amplification unit is integrated in a radio frequency converter chip, and the amplification unit comprises a low noise amplifier and a band-pass filter which are electrically connected; a conversion unit, a first down-conversion oscillographic unit and a second down-conversion oscillographic unit are integrated in the down-conversion converter chip. The conversion unit comprises an analog-to-digital converter and a digital oscillator which are electrically connected, and the output end of the digital oscillator is electrically connected with the first down-conversion oscillographic unit and the second down-conversion oscillographic unit respectively; the first down-conversion oscillographic unit comprises a first indicating lamp, a first down-conversion digital controller, a first adjustable capacitor and a first oscilloscope which are electrically connected in sequence; the second down-conversion oscillographic unit comprises a second indicating lamp, a second down-conversion digital controller, a second adjustable capacitor and a second oscilloscope which are electrically connected in sequence. The assembly is diversified in output and rich in practical scene. Signal frequencies displayed by the first oscilloscope and the second oscilloscope can be recorded and monitored, and it is ensured that output signals are adaptive to application scenes.

Description

Technical Field

[0001] The utility model relates to the technical fields of semiconductor integrated circuits and down-conversion components with such semiconductor integrated circuits, and particularly relates to a dual-channel down-conversion component. Background Art

[0002] Many modern radio architectures include a down-conversion stage that can down-convert the radio frequency or microwave band to a lower frequency for baseband processing. Whether the ultimate application is a communication application, an electro-chemical industry, or an instrumentation application, the target frequency is getting higher and higher, and the radio frequency and microwave spectra are added. A viable solution to this situation is to use a down-conversion component.

[0003] Utility model CN201420718560.6 discloses a dual-channel down-conversion conversion control circuit, which is provided with an external input signal terminal for bias switching control and a bias switching control logic circuit in the circuit. The bias switching control logic circuit has a bias switching control signal input terminal, a first polarization signal input terminal, and a second polarization signal input terminal. The output terminal of the bias switching control logic circuit has four, which are respectively used to control the first, second, third, and fourth high-frequency amplifiers for bias switching. The dual-channel down-conversion function is realized, but there is no detection and monitoring function for the output signal frequency, and the output signal frequency is single, and it is impossible to timely find out whether the output signal is suitable for the application scenario, thereby affecting the use. Summary of the Utility Model

[0004] To solve the technical problems existing in the above background art, the utility model provides a dual-channel down-conversion component.

[0005] The technical solution of the utility model is as follows:

[0006] A dual-channel down-conversion component includes a radio frequency converter chip and a down-conversion digital controller chip, and the down-conversion digital controller chip is arranged on the upper surface of the radio frequency converter chip.

[0007] It is characterized in that: an amplification unit is integrated inside the radio frequency converter chip, and the amplification unit includes a low-noise amplifier and a band-pass filter which are electrically connected, and the input end of the low-noise amplifier receives a signal;

[0008] A conversion unit, a first down-conversion oscilloscope unit, and a second down-conversion oscilloscope unit are integrated inside the down-conversion converter chip. Among them, the conversion unit includes an analog-to-digital converter and a digital oscillator which are electrically connected, the analog-to-digital converter is electrically connected to the band-pass filter, and the output end of the digital oscillator is respectively electrically connected to the first down-conversion oscilloscope unit and the second down-conversion oscilloscope unit;

[0009] The first down-conversion oscilloscope unit includes a first indicator light, a first down-conversion digital controller, a first adjustable capacitor, and a first oscilloscope that are electrically connected in sequence. The first indicator light is electrically connected to a digital oscillator;

[0010] The second down-conversion oscilloscope unit includes a second indicator light, a second down-conversion digital controller, a second adjustable capacitor, and a second oscilloscope that are electrically connected in sequence. The second indicator light is electrically connected to a digital oscillator.

[0011] The capacitance range of the first adjustable capacitor is 0.1 to 1 picofarad.

[0012] The specific models of the first adjustable capacitor are KJ1SD, KJ1HV, or KT1SD.

[0013] The capacitance range of the second adjustable capacitor is 1.4 - 3.05 nanofarads.

[0014] The specific model of the second adjustable capacitor is GME11501.

[0015] The radio frequency converter chip integrates high-frequency output; the down-conversion digital controller chip is an integrated digital down-converter.

[0016] As a pin of the radio frequency converter chip configured with an input high-frequency signal, it is connected to a pin configured on the down-conversion digital controller chip.

[0017] Two high-frequency input pins of the down-conversion digital controller chip are separated from the output pins on the same side of the radio frequency converter chip by two or more pins.

[0018] The wiring lengths of the high-frequency output pins of the down-conversion digital controller chip and the high-frequency input pins of the radio frequency converter chip are both shorter than the lengths of other wirings on the same side.

[0019] The radio frequency converter chip and the down-conversion digital controller chip are electrically connected through a 6-bit data bus to transmit data in parallel.

[0020] Through the above design, the beneficial effects of a dual-channel down-conversion component of the present utility model are as follows:

[0021] After the low-noise amplifier receives a signal, it is sequentially processed by a band-pass filter, an analog-to-digital converter, a digital oscillator, a first down-conversion converter or a second down-conversion converter, and then reaches the first adjustable capacitor or the second adjustable capacitor. The first adjustable capacitor is a small-capacity capacitor that can filter low-frequency signals, and the first down-conversion oscilloscope unit finally outputs a high-frequency signal; the second adjustable capacitor is a large-capacity capacitor that can filter high-frequency signals, and the second down-conversion oscilloscope unit finally outputs a low-frequency signal; by monitoring the output signal frequency through the first oscilloscope and the second oscilloscope, if it does not meet the requirements of the application scenario, the output frequency can be adjusted by adjusting the first adjustable capacitor and the second adjustable capacitor, bringing the advantages of diverse output frequencies and rich practical scenarios. Description of the Drawings

[0022] In the drawings:

[0023] Figure 1 is a schematic circuit diagram of the dual-channel down-conversion of the present utility model;

[0024] Figure 2 is a schematic diagram of the structure of the dual-channel down-conversion of the present utility model;

[0025] The components represented by the reference numerals in the drawings are:

[0026] 1. Low-noise amplifier; 2. Band-pass filter; 3. Analog-to-digital converter; 4. Digital oscillator; 5. First indicator light; 6. First down-conversion converter; 7. First adjustable capacitor; 8. First oscilloscope; 9. Second indicator light; 10. Second down-conversion converter; 11. Second adjustable capacitor; 12. Second oscilloscope; 13. RF converter chip; 14. Down-conversion digital controller chip. Detailed Description of the Preferred Embodiment

[0027] Referring to Figure 2 , a dual-channel down-conversion component includes an RF converter chip 13 and a down-conversion digital controller chip 14. The down-conversion digital controller chip 14 is disposed on the upper surface of the RF converter chip 13. The RF converter chip 13 integrates high-frequency output; the down-conversion digital controller chip 14 is an integrated digital down-converter. As the pins of the RF converter chip 13 configured with the input high-frequency signal are connected to the pins of the down-conversion digital controller chip 14. The RF converter chip 13 and the down-conversion digital controller chip 14 are electrically connected through a 6-bit data bus to transmit data in parallel.

[0028] Two high-frequency input pins of the down-conversion digital controller chip 14 are separated from the output pins on the same side of the RF converter chip 13 by two or more pins, and the inner chip is disposed on the side closest to the high-frequency input pins in the installation area. The wiring lengths of the high-frequency output pins of the down-conversion digital controller chip 14 and the high-frequency input pins of the RF converter chip 13 are both shorter than those of the other wirings on the same side.

[0029] By shortening the wiring of the high-frequency input end, the transmission loss caused by the skin effect of the high-frequency signal is effectively reduced. This also reduces the inductance of the wiring, thereby optimizing the impedance matching state of the high-frequency input end of the integrated circuit and significantly reducing the return loss caused by impedance mismatch. With the reduction of the input end loss, the noise figure of the integrated circuit is significantly improved, directly enhancing the receiving sensitivity of the overall component. In addition, this improvement enables the system to meet the higher isolation requirements between the two signals.

[0030] The intermediate-frequency signal is set on a pair of opposite sides adjacent to the side where the high-frequency input terminal is located. One is to reduce the isolation between the high-frequency input terminal and the intermediate-frequency output terminal; the other is to minimize the loss of the intermediate-frequency signal due to the lead. However, since the loss of the intermediate-frequency signal basically does not cause an increase in the noise figure, there is no strict limit on its configuration.

[0031] The radio frequency converter chip 13 integrates an amplification unit internally. The amplification unit includes a low-noise amplifier 1 and a band-pass filter 2 which are electrically connected. The input terminal of the low-noise amplifier 1 receives a signal, and the output terminal of the low-noise amplifier 1 is electrically connected to the input terminal of the band-pass filter 2.

[0032] The down-conversion converter chip integrates a conversion unit, a first down-conversion oscilloscope unit and a second down-conversion oscilloscope unit inside. See the internal circuit diagram in Figure 1 。

[0033] Among them, the conversion unit includes an analog-to-digital converter 3 and a digital oscillator 4 which are electrically connected. The input terminal of the analog-to-digital converter 3 is electrically connected to the output terminal of the band-pass filter 2, the output terminal of the analog-to-digital converter 3 is electrically connected to the input terminal of the digital oscillator 4, and the output terminal of the digital oscillator 4 is electrically connected to the first down-conversion oscilloscope unit and the second down-conversion oscilloscope unit respectively.

[0034] The first down-conversion oscilloscope unit includes a first indicator light 5, a first down-conversion digital controller 6, a first adjustable capacitor 7 and a first oscilloscope 8 which are electrically connected in sequence. The input terminal of the first indicator light 5 is electrically connected to the output terminal of the digital oscillator 4.

[0035] The first indicator light 5 is a multi-color patch LED. When the circuit is connected and operating normally, it flashes green when current passes through; when the circuit is connected but fails to operate normally and no current passes through, it flashes red.

[0036] In the received signal, if the intermediate-frequency signal obtained after mixing is lower than the original signal, then this mixing method is down-conversion. The purpose of the first down-conversion digital controller 6 is to reduce the carrier frequency of the signal or directly remove the carrier frequency to obtain a baseband signal.

[0037] The capacitance range of the first adjustable capacitor 7 is 0.1 to 1 picofarad. Specific models can select capacitors such as KJ1SD, KJ1HV or KT1SD. The capacitance of the first adjustable capacitor 7 belongs to a small-capacitance capacitor. When in use, high-frequency signals can pass through, and low-frequency signals cannot pass through, playing a role in filtering and screening signals, making the output signal frequency more adaptable to more specific different application fields.

[0038] The first oscilloscope 8 is used to measure and display the waveform, amplitude, frequency, phase and other parameters of the electrical signal of the first down-conversion oscilloscope unit. When the output signal passes through the first oscilloscope 8, it can monitor whether the signal frequency meets expectations. If the signal frequency meets expectations, the frequency information displayed by the first oscilloscope 8 can be recorded and monitored in real time; if the frequency does not meet expectations, the capacity of the first adjustable capacitor 7 can be adjusted in time to adapt to the application scenario.

[0039] The second down-conversion oscilloscope unit comprises a second indicator light 9 , a second down-conversion digital controller, a second adjustable capacitor 11 and a second oscilloscope 12 which are electrically connected in sequence. The second indicator light 9 is electrically connected to the digital oscillator 4 .

[0040] The second indicator light 9 is a multi-color SMD LED. When the circuit is connected and operates normally, it flashes green when current passes through it; when the circuit is connected but fails to operate normally, it flashes red when no current passes through it.

[0041] The purpose of the second down-conversion digital controller is to reduce the carrier frequency of the signal or directly remove the carrier frequency to obtain a baseband signal.

[0042] The capacity range of the second adjustable capacitor 11 is 1.4-3.05 nanofarads. The second adjustable capacitor can select a capacitor with a specific model of GME11501. The capacity of the second adjustable capacitor 11 belongs to a large-capacity capacitor. When used, low-frequency signals can pass through, but high-frequency signals cannot pass through, which plays the role of filtering and screening signals. Screening the output signal frequency can subdivide the signal application field, and the output signal is more diverse and can be applied to more subdivided application fields.

[0043] The second oscilloscope 12 is used to measure and display the waveform, amplitude, frequency, phase and other parameters of the electrical signal output by the second down-conversion oscilloscope unit. When the output signal passes through the second oscilloscope 12, it can monitor whether the signal frequency meets expectations. If the signal frequency meets expectations, the frequency information displayed by the first oscilloscope 8 can be recorded and monitored in real time; if the frequency does not meet expectations, the capacity of the second adjustable capacitor 11 can be adjusted in time to adapt to the application scenario.

Claims

1. A dual-channel down-conversion component, comprising a radio frequency converter chip (13) and a down-conversion digital controller chip (14), and the down-conversion digital controller chip (14) is arranged on the upper surface of the radio frequency converter chip (13); It is characterized in that: An amplification unit is integrated inside the radio frequency converter chip (13), and the amplification unit includes a low-noise amplifier (1) and a band-pass filter (2) which are electrically connected, and the input end of the low-noise amplifier (1) receives a signal; A conversion unit, a first down-conversion oscilloscope unit and a second down-conversion oscilloscope unit are integrated inside the down-conversion digital controller chip (14); wherein, the conversion unit includes an analog-to-digital converter (3) and a digital oscillator (4) which are electrically connected, the analog-to-digital converter (3) is electrically connected to the band-pass filter (2), and the output end of the digital oscillator (4) is respectively electrically connected to the first down-conversion oscilloscope unit and the second down-conversion oscilloscope unit; The first down-conversion oscilloscope unit includes a first indicator light (5), a first down-conversion digital controller, a first adjustable capacitor (7) and a first oscilloscope (8) which are sequentially electrically connected, and the first indicator light (5) is electrically connected to the digital oscillator (4); The second down-conversion oscilloscope unit includes a second indicator light (9), a second down-conversion digital controller, a second adjustable capacitor (11) and a second oscilloscope (12) which are sequentially electrically connected, and the second indicator light (9) is electrically connected to the digital oscillator (4).

2. The dual-channel down-conversion component according to claim 1, wherein The capacitance range of the first adjustable capacitor (7) is 0.1 - 1 picofarad.

3. The dual-channel down-conversion component according to claim 2, wherein The specific model of the first adjustable capacitor (7) is KJ1SD, KJ1HV or KT1SD.

4. A dual-channel down-conversion component according to claim 1, wherein The capacitance range of the second adjustable capacitor (11) is 1.4 - 3.05 nanofarad.

5. A dual-channel down-conversion component according to claim 4, wherein The specific model of the second adjustable capacitor (11) is GME11501.

6. The dual-channel down-conversion module according to claim 1, characterized in that The radio frequency converter chip (13) integrates high-frequency output; the down-conversion digital controller chip (14) is an integrated digital down-converter.

7. A dual-channel down-conversion component according to claim 6, characterized in that, As a pin of the radio frequency converter chip (13) configured to be input with a high-frequency signal, it is connected to a pin configured on the down-conversion digital controller chip (14).

8. A dual-channel down-conversion component according to claim 7, characterized in that, The two high-frequency input pins of the down-conversion digital controller chip (14) are separated by two or more pins from the output pins on the same side of the radio frequency converter chip (13).

9. A dual-channel down-conversion component according to claim 7, characterized in that The wiring lengths of the high-frequency output pins of the down-conversion digital controller chip (14) and the high-frequency input pins of the radio frequency converter chip (13) are both shorter than the lengths of other wirings on the same side.

10. A dual-channel down-conversion component according to claim 6, characterized in that, The radio frequency converter chip (13) and the down-conversion digital controller chip (14) are electrically connected through a 6-bit data bus to transmit data in parallel.

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