Low-noise amplifier with novel structure

Abstract

The utility model relates to the technical field of low noise amplifiers, in particular to a novel structure low noise amplifier which comprises a circuit board electrically connected with a waveform processor, the input end of the waveform processor is electrically connected with a noise waveform device, a full tone waveform device and a main tone waveform device, and the output end of the waveform processor is electrically connected with a gain device. The output end of the gainer is electrically connected with an amplifier. According to the utility model, the noise receiver is used for receiving noise, the noise ripple device is used for converting the received noise into noise ripples, the full-tone receiver is used for receiving a sound source, the full-tone ripple device is used for converting the received sound source into full-tone ripples, the main-tone receiver is used for receiving main tone, and the main-tone ripple device is used for converting the received sound source into main-tone ripples. The full-tone ripples are compared with the noise ripples and the main-tone ripples through the ripple processor, unwanted noise in an input sound source can be accurately eliminated, the output sound source is enhanced through the gain device, and finally the output sound source is output through the amplifier.

Description

Technical Field

[0001] The utility model relates to the technical field of low-noise amplifiers, in particular to a low-noise amplifier with a novel structure. Background Art

[0002] Low noise amplifier, an amplifier with very low noise figure, generally used as a high-frequency or intermediate-frequency preamplifier for various radio receivers, and an amplifier circuit for highly sensitive electronic detection equipment;

[0003] A search of a Chinese patent with publication number CN214756257U discloses a low noise amplifier module.

[0004] The above-mentioned technical solution includes a low-noise amplifier circuit, a low-pass filter circuit, an equalizer circuit, a power amplifier circuit, a high-pass filter circuit, a power supply circuit, and a voltage conversion circuit. The input of the low-noise amplifier circuit is connected to the RF input signal RFin, the output of the low-noise amplifier circuit is connected to the input of the low-pass filter circuit, the output of the low-pass filter circuit is connected to the input of the equalizer circuit, the output of the equalizer circuit is connected to the input of the power amplifier circuit, the output of the power amplifier circuit is connected to the input of the high-pass filter circuit, and the output of the high-pass filter circuit is connected to the RF output interface RFout. This low-noise amplifier module simplifies the circuit, reduces costs, and improves yield while meeting the requirements of gain, noise figure, dynamic range, and out-of-band suppression.

[0005] However, in the above scheme, this technology filters out high-frequency interference signals outside the working frequency band through a low-pass filter circuit. It eliminates noise based on the working frequency band, but the definition of the working frequency band is unclear, which may cause damage to the main audio. In addition to the interference of external sound sources, the external electromagnetic signals and the circuit signals themselves will also pollute the audio and cause circuit damage. Commonly used low-noise amplifiers are usually fixed and installed with screws. When the low-noise amplifier is disassembled for regular maintenance and testing, it is very troublesome and inconvenient to operate.

[0006] To this end, we propose a new type of low noise amplifier structure. Utility Model Content

[0007] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a low-noise amplifier with a new structure.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a low-noise amplifier with a new structure, including a shielding box, an audio component is arranged in the shielding box, the audio component includes a circuit board, the circuit board is electrically connected to a waveform processor, the input end of the waveform processor is electrically connected to a noise waveform maker, a full-tone waveform maker and a main tone waveform maker, the output end of the waveform processor is electrically connected to an amplifier, and the output end of the amplifier is electrically connected to an amplifier.

[0009] Preferably, the noise waveform input end is electrically connected to a noise receiver, the full-tone waveform input end is electrically connected to a full-tone receiver, and the main tone waveform input end is electrically connected to a main tone receiver.

[0010] Preferably, the noise receiver, full-tone receiver and main tone receiver are respectively arranged on the noise receiver port, full-tone receiver port and main tone receiver port, and the noise receiver port, full-tone receiver port and main tone receiver port are arranged on the shielding box.

[0011] Preferably, the shielding box comprises a protective shell, an electromagnetic shielding shell is sleeved inside the protective shell, and an electromagnetic absorption shell is sleeved inside the electromagnetic shielding shell.

[0012] Preferably, an insulator is filled between the electromagnetic shielding shell and the electromagnetic absorption shell.

[0013] Preferably, the shielding box is slidably connected to the mounting shell through a slide groove, and the side and bottom surfaces of the mounting shell are provided with fixing claws, and the fixing claws are against the shielding box. The fixing claws include a coil spring, and the coil spring is fixedly connected to the mounting shell through a mounting seat, and the output end of the coil spring is fixedly connected to a rotating shaft.

[0014] Preferably, the rotating shaft is fixedly connected to one side of the rotating rod, and one end of the rotating rod is fixedly connected to a clamping plate.

[0015] The present invention provides a low noise amplifier with a novel structure, which has the following improvements and advantages compared with the prior art:

[0016] (1) The present invention adopts a method of marking a specific sound source, and sets an audio component including a circuit board, the circuit board is electrically connected to a waveform processor, the input end of the waveform processor is electrically connected to a noise waveform generator, a full-tone waveform generator and a main tone waveform generator, the output end of the waveform processor is electrically connected to an amplifier, the output end of the amplifier is electrically connected to an amplifier, the input end of the noise waveform generator is electrically connected to a noise receiver, the input end of the full-tone waveform generator is electrically connected to a full-tone receiver, the input end of the main tone waveform generator is electrically connected to a main tone receiver, the noise receiver, the full-tone receiver and the main tone receiver are respectively arranged on the noise receiver port, the full-tone receiver port and the main tone receiver port. The noise receiving port, full-tone receiving port and main tone receiving port are arranged on the shielding box. The noise is received by setting a noise receiver, and the noise corrugator converts the received noise into noise corrugation. The full-tone receiver receives the sound source, and the full-tone corrugator converts the received sound source into full-tone corrugation. The main tone receiver receives the main sound, and the main tone corrugator converts the received sound source into main tone corrugation. The full-tone corrugation is compared with the noise corrugation and the main tone corrugation through the corrugation processor to output a low-noise sound source, which can accurately eliminate unnecessary noise in the input sound source, and the output sound source is strengthened through the gain device and finally output through the amplifier.

[0017] (2) The utility model adopts the method of combining an electromagnetic shielding shell with an electromagnetic absorption shell to deal with electromagnetic interference. A shielding box is provided, which includes a protective shell. An electromagnetic shielding shell is sleeved inside the protective shell. An electromagnetic absorption shell is sleeved inside the electromagnetic shielding shell. An insulator is filled between the electromagnetic shielding shell and the electromagnetic absorption shell. The protective box is provided to protect the circuit board from damage caused by external impact. The electromagnetic shielding shell can isolate external signal interference. The electromagnetic absorption shell can absorb the electromagnetic signal emitted by the device itself. The insulator is provided to isolate the electromagnetic shielding shell and the electromagnetic absorption shell, which can effectively reduce the electromagnetic interference of external electromagnetic signals and the circuit signal itself on the device.

[0018] (3) The utility model adopts a fixed claw to hold the shielding box, and the shielding box is connected to the mounting shell in a sliding manner through a slide groove. The side and bottom surfaces of the mounting shell are provided with fixed claws, and the fixed claws are against the shielding box. The fixed claws include a coil spring, and the coil spring is fixedly connected to the mounting shell through a mounting seat. The output end of the coil spring is fixedly connected to a rotating shaft, and the rotating shaft is fixedly connected to one side of the rotating rod. One end of the rotating rod is fixedly connected to a clamping plate. By setting the mounting shell and the shielding box to be slidably connected, it is convenient to take out the shielding box, and the energy stored on the fixed claw through the coil spring can be reset after opening, thereby limiting the shielding box and facilitating the maintenance of the device by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely illustrative, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0020] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic structural perspective view of the fixed claw in the present invention;

[0022] Figure 3 It is a schematic structural plan view of the shielding box in the present utility model.

[0023] Legend:

[0024] 10. Mounting shell; 11. Slide groove; 20. Shielding box; 21. Noise receiver; 22. Full-tone receiver; 23. Main tone receiver; 24. Protective shell; 25. Electromagnetic shielding shell; 26. Insulator; 27. Electromagnetic absorption shell; 30. Fixing claw; 31. Coil spring; 32. Mounting seat; 33. Rotating shaft; 34. Rotating rod; 35. Card; 40. Audio component; 41. Noise receiver; 42. Full-tone receiver; 43. Main tone receiver; 44. Noise waveform generator; 45. Full-tone waveform generator; 46. Main tone waveform generator; 47. Circuit board; 48. Waveform processor; 49. Gainer; 50. Amplifier. DETAILED DESCRIPTION

[0025] The invention is further described below with reference to the accompanying drawings and specific implementation methods: Example 1

[0026] See also Figure 1 and Figure 3Example 1 is described, including a shielding box 20, in which an audio component 40 is provided. The audio component 40 includes a circuit board 47, which is powered by the circuit board 47. The circuit board 47 is electrically connected to a waveform processor 48. The function of the waveform processor 48 is to compare the waveform of the sound source, thereby comparing the waveforms of the noise and the main sound with the waveform of the full-tone sound source. The input end of the waveform processor 48 is electrically connected to a noise waveform maker 44, a full-tone waveform maker 45 and a main-tone waveform maker 46. The noise waveform maker 44 converts noise into a noise waveform, the full-tone waveform maker 45 converts the sound source of the received sound into a full-tone waveform, and the main-tone waveform maker 46 converts the sound source of the received sound into a main-tone waveform. The output end of the waveform processor 48 is electrically connected to an gain device 49. The function of the gain device 49 is to increase the gain by 1 / 4. The device 49 strengthens the output sound source. The output end of the gain device 49 is electrically connected to the amplifier 50, and the amplifier 50 releases the sound source. The input end of the noise waveform device 44 is electrically connected to the noise receiver 41, and the noise receiver 41 receives the noise sound source. The input end of the full-tone waveform device 45 is electrically connected to the full-tone receiver 42, and the full-tone receiver 42 receives the full-tone sound source, that is, it records all audio. The input end of the main sound waveform device 46 is electrically connected to the main sound receiver 43, and the main sound receiver 43 receives the main sound source. The noise receiver 41, the full-tone receiver 42 and the main sound receiver 43 are respectively arranged on the noise receiving port 21, the full-tone receiving port 22 and the main sound receiving port 23, and the noise receiving port 21, the full-tone receiving port 22 and the main sound receiving port 23 are arranged on the shielding box 20;

[0027] In this embodiment, a noise receiver 41 is set to receive noise, a noise waveform generator 44 converts the received noise into a noise waveform, a full-tone receiver 42 receives the sound source, a full-tone waveform generator 45 converts the received sound source into a full-tone waveform, a main sound receiver 43 receives the main sound, a main sound waveform generator 46 converts the received sound source into a main sound waveform, and a waveform processor 48 compares the full-tone waveform with the noise waveform and the main sound waveform to output a low-noise sound source, which can accurately eliminate unnecessary noise in the input sound source, and the output sound source is strengthened by the gain device 49 and finally outputted through the amplifier 50.

[0028] Example 2

[0029] See also Figure 1 and Figure 3 Embodiment 2 is described, including a shielding box 20 including a protective shell 24, which protects a circuit board 47 from damage caused by external impacts. An electromagnetic shielding shell 25 is sleeved inside the protective shell 24, and the electromagnetic shielding shell 25 can isolate external signal interference. An electromagnetic absorption shell 27 is sleeved inside the electromagnetic shielding shell 25, and the electromagnetic absorption shell 27 is configured to absorb electromagnetic signals emitted by the device itself. An insulator 26 is filled between the electromagnetic shielding shell 25 and the electromagnetic absorption shell 27 to isolate the electromagnetic shielding shell 25 from the electromagnetic absorption shell 27.

[0030] In this embodiment, a protective shell 24 is provided to protect the circuit board 47 from damage by external impact, an electromagnetic shielding shell 25 is provided to isolate external signal interference, and an electromagnetic absorption shell 27 is provided to absorb the electromagnetic signals emitted by the device itself. The insulator 26 is provided to isolate the electromagnetic shielding shell 25 and the electromagnetic absorption shell 27, which can effectively reduce the electromagnetic interference of external electromagnetic signals and the circuit signals of the device itself to the device.

[0031] Example 3

[0032] See also Figure 1 and Figure 2 Describe embodiment 2, including a shielding box 20 that is slideably connected to the mounting shell 10 through a slide groove 11, which is convenient for pulling out the shielding box 20 for maintenance. The side and bottom surfaces of the mounting shell 10 are provided with fixing claws 30, which abut against the shielding box 20 and can limit the shielding box 20. The fixing claws 30 include a coil spring 31, which rotates to store energy. The coil spring 31 is fixedly connected to the mounting shell 10 through a mounting seat 32. The output end of the coil spring 31 is fixedly connected to a rotating shaft 33, and the rotating shaft 33 outputs the stored energy of the coil spring 31. The rotating shaft 33 is fixedly connected to one side of a rotating rod 34. The function of the rotating rod 34 is to extend the connection so that it can perform circular motion. One end of the rotating rod 34 is fixedly connected to a card plate 35, and the card plate 35 limits the shielding box 20.

[0033] In this embodiment, the mounting shell 10 is slidably connected to the shield, so that the shield box 20 can be easily removed, and the fixed claw 30 can be reset after opening through the coil spring 31 to limit the shield box 20, making it convenient for staff to inspect and repair the device.

Claims

1. A novel low noise amplifier, comprising a shielding box (20), characterized in that: An audio component (40) is provided in the shielding box (20), and the audio component (40) includes a circuit board (47). The circuit board (47) is electrically connected to a waveform processor (48). The input end of the waveform processor (48) is electrically connected to a noise waveform generator (44), a full-tone waveform generator (45), and a main tone waveform generator (46). The output end of the waveform processor (48) is electrically connected to an amplifier (49), and the output end of the amplifier (49) is electrically connected to an amplifier (50).

2. The novel low noise amplifier according to claim 1, characterized in that: The input end of the noise waveform generator (44) is electrically connected to a noise receiver (41), the input end of the full-tone waveform generator (45) is electrically connected to a full-tone receiver (42), and the input end of the main tone waveform generator (46) is electrically connected to a main tone receiver (43).

3. The novel low noise amplifier according to claim 2, characterized in that: The noise receiver (41), full-tone receiver (42) and main-tone receiver (43) are respectively arranged on the noise receiver port (21), full-tone receiver port (22) and main-tone receiver port (23); and the noise receiver port (21), full-tone receiver port (22) and main-tone receiver port (23) are arranged on the shielding box (20).

4. The novel low noise amplifier according to claim 1, characterized in that: The shielding box (20) comprises a protective shell (24), an electromagnetic shielding shell (25) is sleeved inside the protective shell (24), and an electromagnetic absorption shell (27) is sleeved inside the electromagnetic shielding shell (25).

5. The novel low noise amplifier according to claim 4, characterized in that: An insulator (26) is filled between the electromagnetic shielding shell (25) and the electromagnetic absorption shell (27).

6. The novel low noise amplifier according to claim 1, characterized in that: The shielding box (20) is slidably connected to the mounting shell (10) through a sliding groove (11) and can be pulled out. The side and bottom surfaces of the mounting shell (10) are provided with fixing claws (30). The fixing claws (30) are against the shielding box (20). The fixing claws (30) include a coil spring (31). The coil spring (31) is fixedly connected to the mounting shell (10) through a mounting seat (32). The output end of the coil spring (31) is fixedly connected to a rotating shaft (33).

7. The novel low noise amplifier according to claim 6, characterized in that: The rotating shaft (33) is fixedly connected to one side of the rotating rod (34), and one end of the rotating rod (34) is fixedly connected to a clamping plate (35).

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