CN216600213U

CN216600213U - QFN integrated circuit-based automatic gain control amplifier

Info

Publication number: CN216600213U
Application number: CN202123205664.6U
Authority: CN
Inventors: 蒋政; 方林宣; 徐�明
Original assignee: Zhongshan Qiaohang Technology Co ltd
Current assignee: Zhongshan Qiaohang Technology Co ltd
Priority date: 2021-12-18
Filing date: 2021-12-18
Publication date: 2022-05-24
Anticipated expiration: 2031-12-18

Abstract

The utility model discloses an automatic gain control amplifier based on a QFN integrated circuit, which comprises an outer casing, wherein the outer casing is formed by pressing an upper pressing casing and a lower pressing casing, four end sides of the upper pressing casing and the lower pressing casing are provided with mounting holes, a pressing groove is formed in the lower pressing casing, and an inserting strip which is hermetically inserted into the pressing groove is arranged on the connecting end surface of the upper pressing casing. The QFN integrated circuit-based automatic gain control amplifier improves the splitting convenience, is convenient to overhaul an internal circuit board, effectively ensures the internal sealing property by inserting, closing and pressing a pressing groove and a cutting at the same time of pressing, prevents dampness and dust from entering, improves the use safety, is meshed with an adjusting gear, is used for limiting the adjusting gear under the action of no external pressure, improves the use stability and automatically controls the gain level of the amplifier, thereby achieving the aim of automatically adjusting a radio frequency signal to stabilize an output signal.

Description

QFN integrated circuit-based automatic gain control amplifier

Technical Field

The utility model relates to the technical field of amplifiers, in particular to an automatic gain control amplifier based on a QFN integrated circuit.

Background

The existing amplifier circuit is used for amplifying the unstable radio frequency characteristic electric signals of the triode and is difficult to acquire and judge, the gain control and regulation circuit adopts a radio frequency diode combined radio frequency amplifying triode mode, radio frequency parameters are greatly interfered, indexes are unstable and difficult to debug, and a large amount of debugging cost is consumed. And the radio frequency separation type amplifying triode and the peripheral circuit electronic components are more in quantity, large in space occupation ratio and not easy to simplify the circuit design.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatic gain control amplifier based on a QFN integrated circuit, which improves the splitting convenience and is convenient for overhauling an internal circuit board, a laminating groove and a cutting are inserted and pressed during laminating, the internal sealing performance is effectively ensured, the damp and dust are prevented, the use safety is improved, a soft rubber tooth socket is meshed with an adjusting gear and used for limiting the adjusting gear under the action of no external pressure, the use stability is improved, the gain level of the amplifier is automatically controlled, the aim of automatically adjusting a radio frequency signal to stabilize an output signal is fulfilled, and the problems in the prior art are solved.

In order to achieve the purpose, the utility model provides the following technical scheme: the automatic gain control amplifier comprises an outer casing, wherein the outer casing is formed by pressing an upper pressing casing and a lower pressing casing, mounting holes are formed in four end sides of the upper pressing casing and the lower pressing casing, a pressing groove is formed in the lower pressing casing, an inserting strip which is hermetically inserted into the pressing groove is arranged on the connecting end face of the upper pressing casing, adjusting pieces are arranged at the side ends of the upper pressing casing and the lower pressing casing, and circuit boards are arranged in the upper pressing casing and the lower pressing casing in a wrapping mode.

Preferably, the adjusting part comprises a built-in groove, a screw rod, a fixing rod and an adjusting gear, the built-in groove is formed in the side end of the lower pressing shell, the screw rod is installed in the built-in groove, the adjusting gear is sleeved on the screw rod in the built-in groove, and the fixing rod is fixed in the side end of the lower pressing shell.

Preferably, the fixing rod is fixedly installed in the lower pressing shell, the screw rod is connected with the lower pressing shell through a bearing, two ends of the upper pressing shell are sleeved on the screw rod and the fixing rod, and the upper pressing shell is movably sleeved with the screw rod through a matched nut.

Preferably, the inner wall of the built-in groove is provided with a soft rubber tooth socket, and the soft rubber tooth socket is meshed with one side of the adjusting gear.

Preferably, the upper pressing shell and the lower pressing shell are movably sealed and pressed through the adjusting piece.

Preferably, the circuit board adopts a QFN integrated circuit IC as a main control unit.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model relates to an automatic gain control amplifier based on a QFN integrated circuit, wherein an upper pressure shell is movably sleeved with a screw rod through a matched nut, the inner wall of an internal groove is provided with a soft rubber tooth socket which is engaged with one side of an adjusting gear, the upper pressure shell and a lower pressure shell are movably sealed and pressed through an adjusting piece, the adjusting gear is extruded to rotate, the screw rod is driven to rotate while the adjusting gear rotates, the upper pressure shell is driven to move on the screw rod and a fixed rod through forward rotation and reverse rotation, the upper pressure shell and the lower pressure shell are never driven to open and close and tightly pressed, the disassembly convenience is improved, an internal circuit board is convenient to overhaul, a pressing groove and an inserting strip are inserted and tightly pressed while pressing, the internal sealing performance is effectively ensured, the moisture and dust are prevented from entering, the use safety is improved, the soft rubber tooth socket is engaged with the adjusting gear, and the adjusting gear is limited under the action of no external pressure, the use stability is improved.

2. The utility model relates to an automatic gain control amplifier based on a QFN integrated circuit, wherein a circuit board adopts the QFN integrated circuit IC as a main control unit, the QFN integrated circuit IC is adopted as the main control unit to replace the traditional mode of adopting a radio frequency diode to combine a radio frequency amplification triode to amplify signals, the input signals from a system at the front end of an amplifier product are influenced by weather and the quality of ground television receiving equipment, in order to stabilize the signal level of the amplifier, the integrated circuit is adopted to carry out discrimination and processing on the signals and carry out amplification functions, so that the signal output of the whole amplifier is stabilized, the 16Pin QFN integrated circuit IC is utilized to carry out acquisition and discrimination on electric signals and amplify the signals, the signals are used as a main unit circuit of automatic gain control, the gain level of the amplifier is automatically controlled, and the aim of automatically adjusting the radio frequency signals to stably output the signals is fulfilled.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a side cross-sectional view of the overall construction of the present invention;

FIG. 3 is a cross-sectional view of the overall structure of the present invention;

FIG. 4 is an enlarged view taken at A of FIG. 3 according to the present invention;

FIG. 5 is a diagram of a chip structure according to the present invention.

In the figure: 1. an outer casing; 11. pressing the shell upwards; 111. cutting; 12. pressing the shell downwards; 121. a pressing groove; 13. mounting holes; 2. an adjustment member; 21. a built-in groove; 211. a soft rubber gullet; 22. a screw rod; 23. fixing the rod; 24. and adjusting the gear.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, an automatic gain control amplifier based on QFN integrated circuit includes an outer casing 1, the outer casing 1 is formed by pressing an upper pressing casing 11 and a lower pressing casing 12, four ends of the upper pressing casing 11 and the lower pressing casing 12 are provided with mounting holes 13, a pressing groove 121 is formed in the lower pressing casing 12, a connecting end surface of the upper pressing casing 11 is provided with a strip 111 sealed and inserted with the pressing groove 121, side ends of the upper pressing casing 11 and the lower pressing casing 12 are provided with an adjusting member 2, the adjusting member 2 includes an inner groove 21, a screw rod 22, a fixing rod 23 and an adjusting gear 24, the inner groove 21 is formed in the side end of the lower pressing casing 12, the screw rod 22 is installed in the inner groove 21, the adjusting gear 24 is sleeved on the screw rod 22 in the inner groove 21, the fixing rod 23 is fixed in the lower pressing casing 12, the fixing rod 23 is fixedly installed in the lower pressing casing 12, the screw rod 22 is connected with the lower pressing casing 12 through a bearing, the two ends of the upper pressure shell 11 are sleeved on the screw rod 22 and the fixed rod 23, the upper pressure shell 11 is movably sleeved with the screw rod 22 through a matched nut, the inner wall of the built-in groove 21 is provided with a soft rubber tooth socket 211, the soft rubber tooth socket 211 is meshed with one side of the adjusting gear 24, the upper pressure shell 11 and the lower pressure shell 12 are movably sealed and pressed through the adjusting part 2, the adjusting gear 24 is extruded to rotate, the screw rod 22 is driven to rotate while the adjusting gear 24 rotates, the upper pressure shell 11 is driven to move on the screw rod 22 and the fixed rod 23 through positive rotation and reverse rotation, the upper pressure shell 11 and the lower pressure shell 12 are not driven to be opened, closed and pressed, the disassembly convenience is improved, the internal circuit board is convenient to overhaul, the pressing groove 121 and the inserting strip 111 are inserted and pressed during pressing, the internal sealing performance is effectively ensured, the damp and the dust are prevented from entering, the use safety is improved, the soft rubber tooth socket 211 is meshed with the adjusting gear 24, and the adjusting gear 24 is used for limiting under the effect of no external pressure, the use stability is improved.

Referring to fig. 5, the circuit board 3 is disposed inside the upper and lower

pressing cases

11 and 12, the circuit board 3 uses QFN integrated circuit IC as the main control unit, by adopting the QFN integrated circuit IC as a main control unit to replace the traditional mode of adopting a radio frequency diode to combine a radio frequency amplifying triode to amplify signals, the input signals from the system at the front end of an amplifier product are influenced by weather and the quality of ground television receiving equipment, and in order to stabilize the signal level of the amplifier, the integrated circuit is adopted to distinguish and process the signals and has the amplifying function, thereby stabilizing the signal output of the whole amplifier, utilizing the QFN integrated circuit IC of 16Pin to collect and judge the electric signals, and amplifying the signal, and taking the amplified signal as a main unit circuit of automatic gain control to automatically control the gain level of the amplifier, thereby achieving the purpose of automatically adjusting the radio frequency signal to stabilize the output signal.

In summary, the following steps: the utility model relates to an automatic gain control amplifier based on a QFN integrated circuit, wherein an upper pressing shell 11 is movably sleeved with a screw rod 22 through a matched nut, the inner wall of an internal groove 21 is provided with a soft rubber tooth socket 211, the soft rubber tooth socket 211 is meshed with one side of an adjusting gear 24, the upper pressing shell 11 and a lower pressing shell 12 are movably sealed and pressed through an adjusting piece 2, the adjusting gear 24 is extruded to rotate, the screw rod 22 is driven to rotate while the adjusting gear 24 rotates, the upper pressing shell 11 is driven to move on the screw rod 22 and a fixed rod 23 through positive rotation and reverse rotation, the upper pressing shell 11 and the lower pressing shell 12 are never driven to open, close and tightly press, the disassembly convenience is improved, the internal circuit board is convenient to overhaul, a pressing groove 121 and an inserting strip 111 are inserted and tightly pressed while pressing, the internal sealing performance is effectively ensured, the damp and dust are prevented from entering, the use safety is improved, and the soft rubber tooth socket 211 is meshed with the adjusting gear 24, the circuit board 3 adopts a QFN integrated circuit IC as a main control unit, the QFN integrated circuit IC is adopted as the main control unit to replace the traditional mode of adopting a radio frequency diode to combine a radio frequency amplifying triode to amplify signals, the input signals from a system at the front end of an amplifier product are influenced by the weather and the quality of ground television receiving equipment, and the integrated circuit is adopted to judge and process the signals and has the amplifying function to stabilize the signal level of the amplifier, thereby stabilizing the signal output of the whole amplifier, utilizing the 16Pin QFN integrated circuit IC to collect and judge the electric signals and amplify the signals, taking the electric signals as a main unit circuit of automatic gain control, automatically controlling the gain level of the amplifier, and achieving the purpose of automatically adjusting the radio frequency signals to stabilize the output signals, overall structure is simple, reduces unnecessary space and occupies, reduces the cost.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An automatic gain control amplifier based on QFN integrated circuit comprises an outer casing (1), and is characterized in that: the outer cover shell (1) is composed of an upper pressing shell (11) and a lower pressing shell (12) in a pressing mode, four end sides of the upper pressing shell (11) and the lower pressing shell (12) are provided with mounting holes (13), a pressing groove (121) is formed in the lower pressing shell (12), an inserting strip (111) hermetically inserted into the pressing groove (121) is arranged on the connecting end face of the upper pressing shell (11), adjusting pieces (2) are arranged at the side ends of the upper pressing shell (11) and the lower pressing shell (12), and a circuit board (3) is arranged on the inner portion of the upper pressing shell (11) and the inner portion of the lower pressing shell (12) in a covering mode.

2. The QFN integrated circuit-based automatic gain control amplifier of claim 1, wherein: the adjusting piece (2) comprises a built-in groove (21), a screw rod (22), a fixing rod (23) and an adjusting gear (24), the built-in groove (21) is formed in the side end of the downward pressing shell (12), the screw rod (22) is installed in the built-in groove (21), the adjusting gear (24) is sleeved on the screw rod (22) in the built-in groove (21), and the fixing rod (23) is fixed in the side end of the downward pressing shell (12).

3. The QFN integrated circuit-based automatic gain control amplifier of claim 2, wherein: the fixing rod (23) is fixedly installed in the downward pressing shell (12), the screw rod (22) is connected with the downward pressing shell (12) through a bearing, two ends of the upward pressing shell (11) are sleeved on the screw rod (22) and the fixing rod (23), and the upward pressing shell (11) is movably sleeved with the screw rod (22) through a matched nut.

4. The QFN integrated circuit-based automatic gain control amplifier of claim 2, wherein: the inner wall of the built-in groove (21) is provided with a soft rubber tooth socket (211), and the soft rubber tooth socket (211) is meshed with one side of the adjusting gear (24).

5. The QFN integrated circuit-based automatic gain control amplifier of claim 1, wherein: the upper pressing shell (11) and the lower pressing shell (12) are movably sealed and pressed through the adjusting piece (2).

6. The QFN integrated circuit-based automatic gain control amplifier of claim 1, wherein: the circuit board (3) adopts a QFN integrated circuit IC as a main control unit.