CN210327548U

CN210327548U - Broadband channel receiving module for carrying out gain self-adaptive adjustment according to amplitude

Info

Publication number: CN210327548U
Application number: CN201920890004.XU
Authority: CN
Inventors: 陈刚
Original assignee: Hefei Haoxing Technology Co Ltd
Current assignee: Hefei Haoxing Technology Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-04-14
Anticipated expiration: 2029-06-14

Abstract

The utility model discloses a broadband channel receiving module who carries out gain self-adaptation adjustment according to amplitude, including last casing and lower casing, it is regional with the branch road amplification frequency conversion intermediate frequency that the big step-by-step control circuit of gain is provided with to go up the casing inside handles total region, the inside reference signal output merit that is provided with of casing divides output circuit region, branch road local oscillator circuit region and power supply circuit region down, the big step-by-step control circuit of gain is regional inside to be provided with the big step-by-step control circuit module of gain, the big step-by-step control circuit module of gain includes leading preselector, merit and divides ware, gain selectable amplifier and power detection circuit. The utility model discloses a be equipped with the big step control circuit module of gain, be favorable to carrying out the gain stepping according to received signal's power strength, receive and can keep suitable low noise amplification ability, avoid less signal to obtain effectively enlarging and finally unable normal receipt.

Description

Broadband channel receiving module for carrying out gain self-adaptive adjustment according to amplitude

Technical Field

The utility model relates to a broadband channel receiving module technical field, in particular to carry out broadband channel receiving module of gain self-adaptation adjustment according to range.

Background

The channel receiving module is mainly used for receiving the received broadband multi-channel signals in a low noise mode and outputting intermediate frequency signals corresponding to all channels in a down-conversion mode.

Because signals of a plurality of channels are received simultaneously, in order to avoid receiving intermodulation interference influence caused by adjacent channel signals or strong interference signals, the noise coefficient may not be ideal under the condition of receiving small signals because the receiving gain cannot be too high, and the normal demodulation can be realized only by a higher signal-to-noise ratio. And at the same time, the instantaneous dynamic range of the receiving channel is affected, which may result in that the channel with weak signal cannot be received normally.

Therefore, it is necessary to invent a wideband channel receiving module with adaptive gain adjustment according to amplitude to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a carry out broadband channel receiving module of gain self-adaptation adjustment according to range, through being equipped with the big step control circuit module of gain, be favorable to preventing to have in the received signal stronger interference signal or under each inconsistent condition of channel power, avoid less signal to obtain effectively not enlargiing and finally unable normal receipt to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a broadband channel receiving module for carrying out gain self-adaptive adjustment according to amplitude comprises an upper shell and a lower shell, a gain large stepping control circuit area and a branch amplification frequency conversion filtering intermediate frequency processing total area are arranged in the upper shell, a reference signal output power division output circuit area, a branch local oscillator circuit area and a power supply circuit area are arranged in the lower shell, a front panel and a rear panel are respectively arranged between the two ends of the upper shell and the lower shell, a plurality of intermediate frequency output interfaces are arranged on the surface of the front panel, the surface of the back panel is provided with a signal receiving output interface, a power input interface and a power output interface, and a gain large step control circuit module is arranged in the gain large step control circuit area and comprises a pre-preselector, a power divider, a gain selectable amplifier and a power detection circuit.

Preferably, the input end of the large gain step control circuit module is electrically connected to the received signal output interface, the input end of the power detection circuit is electrically connected to the output end of the power divider, and the output end of the power detection circuit is electrically connected to the input end of the selectable gain amplifier.

Preferably, the branch filter area, the branch amplifying and frequency converting filtering intermediate frequency processing total area, the reference signal output power dividing output circuit area and the branch local oscillation circuit area are provided with the same branch output module, and the branch output module includes a branch amplifier, a branch frequency converter, an intermediate frequency filter and an intermediate frequency processor.

Preferably, the branch amplifier, the branch frequency converter, the intermediate frequency filter and the intermediate frequency processor are arranged in a branch amplifying, frequency converting, filtering and intermediate frequency processing total area, and the output end of the branch output module is electrically connected with the intermediate frequency output interface.

Preferably, a branch local oscillator is arranged in the branch local oscillator circuit area, and an output end of the branch local oscillator is electrically connected with an input end of the branch frequency converter.

Preferably, a power supply voltage stabilizing circuit is arranged in the power supply circuit area, the input end of the power supply voltage stabilizing circuit is electrically connected with the power supply input interface, and the output end of the power supply voltage stabilizing circuit is electrically connected with the power supply output interface.

The utility model discloses a technological effect and advantage:

1. through being equipped with big step control circuit module of gain, be favorable to carrying out the gain stepping according to the power intensity of received signal to under the condition that has stronger interference signal or each channel power inconsistency in the received signal, receive and can keep suitable low noise amplification ability, avoid the less signal to obtain effectively not enlarging and finally unable normal receipt.

Drawings

Fig. 1 is a schematic structural view of an upper shell of the present invention;

fig. 2 is a schematic structural view of the lower casing of the present invention;

FIG. 3 is a schematic diagram of the front panel structure of the present invention;

FIG. 4 is a schematic diagram of the structure of the rear panel of the present invention;

fig. 5 is a system diagram of the overall structure of the present invention.

In the figure: 1. an upper housing; 2. a lower housing; 3. a step control circuit area with large gain; 4. a branch amplifying, frequency-converting, filtering and intermediate-frequency processing total area; 5. a reference signal output power division output circuit area; 6. a branch local oscillator circuit area; 7. a power supply circuit region; 8. a front panel; 9. a rear panel; 10. an intermediate frequency output interface; 11. a received signal output interface; 12. a power input interface; 13. a power output interface; 14. a gain large step control circuit module; 15. a pre-selector; 16. a power divider; 17. a gain selectable amplifier; 18. a power detection circuit; 19. a branch output module; 20. a branch amplifier; 21. a branch frequency converter; 22. an intermediate frequency filter; 23. an intermediate frequency processor; 24. a branch local oscillator; 25. a power supply voltage stabilizing circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a broadband channel receiving module who carries out gain self-adaptation adjustment according to range as shown in fig. 1-5, including last casing 1 and lower casing 2, it can constitute a whole with lower casing 1 to go up casing 2, it amplifies frequency conversion filtering intermediate frequency and handles total region 4 to go up the inside big step control circuit area 3 of gain and branch road of being provided with of casing 1, the inside reference signal output merit that is provided with of casing 2 divides output circuit area 5, branch road local oscillator circuit area 6 and power circuit area 7 down, separately places the module through various regions to realize that casing 1 and casing 2 inside volume position is rationally put down, be provided with front panel 8 and rear panel 9 between last casing 1 and lower casing 2 both ends respectively, a plurality of intermediate frequency output interface 10 has been seted up on the front panel 8 surface, received signal output interface 11 has been seted up on the rear panel 9 surface, The power input interface 12 and the power output interface 13, the gain large step control circuit module 14 is arranged in the gain large step control circuit area 3, the gain large step control circuit module 14 includes a pre-preselector 15, a power divider 16, a gain selectable amplifier 17 and a power detection circuit 18, and the gain large step control circuit module 14 is arranged to facilitate gain grading according to the power intensity of a received signal, so that the receiving can keep proper low-noise amplification capability under the condition that a strong interference signal exists in the received signal or the powers of all channels are inconsistent, and the situation that a small signal cannot be effectively amplified and finally cannot be normally received is avoided.

Further, in the above technical solution, an input end of the large gain step control circuit module 14 is electrically connected to the received signal output interface 11, an input end of the power detector circuit 18 is electrically connected to an output end of the power divider 16, an output end of the power detector circuit 18 is electrically connected to an input end of the selectable gain amplifier 17, the received signal is detected by the power detector circuit 18, the maximum gain state is obtained when the received signal power is relatively low, and the received gain is controlled to be further reduced when the received signal power is higher than the minimum received signal power by about a certain degree, the gain is appropriately reduced, and the received signal strength is higher;

further, in the above technical solution, the branch filter area, the branch amplifying and frequency converting intermediate frequency processing total area 4, the reference signal output power dividing output circuit area 5 and the branch local oscillator circuit area 6 are provided with the same branch output module 19, the branch output module 19 includes a branch amplifier 20, a branch frequency converter 21, an intermediate frequency filter 22 and an intermediate frequency processor 23, and the noise-reduced signal passes through the branch output module 19 and is finally output at an intermediate frequency;

further, in the above technical solution, the branch amplifier 20, the branch frequency converter 21, the intermediate frequency filter 22 and the intermediate frequency processor 23 are disposed in the branch amplifying, frequency converting, filtering and intermediate frequency processing total area 4, and the output end of the branch output module 19 is electrically connected to the intermediate frequency output interface 10;

further, in the above technical solution, a branch local oscillator 24 is disposed inside the branch local oscillator circuit area 6, an output end of the branch local oscillator 24 is electrically connected to an input end of the branch frequency converter 21, and the branch local oscillator 24 is disposed, so that local oscillator signals can be transmitted through the branch local oscillator 24, and a proper low-noise amplification capability can be further maintained;

further, in the above technical solution, a power supply voltage stabilizing circuit 25 is disposed inside the power supply circuit region 7, an input end of the power supply voltage stabilizing circuit 25 is electrically connected to the power input interface 12, an output end of the power supply voltage stabilizing circuit 25 is electrically connected to the power output interface 13, and the power supply voltage stabilizing circuit 25 provides power supply required by operation for the apparatus.

This practical theory of operation:

referring to the accompanying drawings 1-5 of the specification, a power supply voltage stabilizing circuit 25 is used for providing power supply required by the operation of the device, a broadband signal is received through a received signal input interface, the broadband signal is subjected to signal preselection through a preselection device 15, when the preselection signal enters a gain large step control circuit module 14, gain grading is carried out according to the power intensity of the received signal, the state with the maximum gain is when the power of the received signal is relatively small, the gain is properly reduced when the power of the received signal is higher than the minimum receiving sensitivity by a certain degree, and the received gain is further reduced when the strength of the received signal is higher, so that the gain of the received signal has a certain corresponding relation according to the actual signal intensity, and especially, under the condition that stronger interference signals exist in the received signal or the powers of all channels are inconsistent, the receiving can keep proper low-noise amplification capability, the situation that smaller signals cannot be effectively amplified and cannot be normally received finally is avoided, the signals subjected to noise reduction pass through the branch output module 19, and finally are output at an intermediate frequency, and the branch local oscillator 24 is arranged, so that local oscillator signals can be transmitted through the branch local oscillator 24, and the proper low-noise amplification capacity is further kept.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A broadband channel receiving module with adaptive gain adjustment according to amplitude comprises an upper shell (1) and a lower shell (2), and is characterized in that: the device is characterized in that a gain large step control circuit area (3) and a branch amplification frequency conversion filtering intermediate frequency processing total area (4) are arranged in the upper shell (1), a reference signal output power division output circuit area (5), a branch local oscillation circuit area (6) and a power supply circuit area (7) are arranged in the lower shell (2), a front panel (8) and a rear panel (9) are respectively arranged between the two ends of the upper shell (1) and the two ends of the lower shell (2), a plurality of intermediate frequency output interfaces (10) are arranged on the surface of the front panel (8), a receiving signal output interface (11), a power supply input interface (12) and a power supply output interface (13) are arranged on the surface of the rear panel (9), a gain large step control circuit module (14) is arranged in the gain large step control circuit area (3), and the gain large step control circuit module (14) comprises a pre-preselector (15), The power divider (16), the gain selectable amplifier (17) and the power detection circuit (18).

2. The wideband channel receiving module with adaptive gain adjustment according to amplitude as claimed in claim 1, wherein: the input end of the gain large-step control circuit module (14) is electrically connected with the received signal output interface (11), the input end of the power detection circuit (18) is electrically connected with the output end of the power divider (16), and the output end of the power detection circuit (18) is electrically connected with the input end of the gain selectable amplifier (17).

3. The wideband channel receiving module with adaptive gain adjustment according to amplitude as claimed in claim 1, wherein: the branch filter area, the branch amplifying and frequency converting filtering intermediate frequency processing total area (4), the reference signal output power dividing output circuit area (5) and the branch local oscillation circuit area (6) are provided with the same branch output module (19), and the branch output module (19) comprises a branch amplifier (20), a branch frequency converter (21), an intermediate frequency filter (22) and an intermediate frequency processor (23).

4. The wideband channel receiving module with adaptive gain adjustment according to amplitude as claimed in claim 3, wherein: the branch amplifier (20), the branch frequency converter (21), the intermediate frequency filter (22) and the intermediate frequency processor (23) are arranged in the branch amplifying, frequency converting, filtering and intermediate frequency processing total area (4), and the output end of the branch output module (19) is electrically connected with the intermediate frequency output interface (10).

5. The wideband channel receiving module with adaptive gain adjustment according to amplitude as claimed in claim 1, wherein: a branch local oscillator (24) is arranged in the branch local oscillator circuit area (6), and the output end of the branch local oscillator (24) is electrically connected with the input end of the branch frequency converter (21).

6. The wideband channel receiving module with adaptive gain adjustment according to amplitude as claimed in claim 1, wherein: the power supply circuit area (7) is internally provided with a power supply voltage stabilizing circuit (25), the input end of the power supply voltage stabilizing circuit (25) is electrically connected with the power supply input interface (12), and the output end of the power supply voltage stabilizing circuit (25) is electrically connected with the power supply output interface (13).