CN205864377U - A kind of little stepping numerical-control attenuator - Google Patents
A kind of little stepping numerical-control attenuator Download PDFInfo
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- CN205864377U CN205864377U CN201620694513.1U CN201620694513U CN205864377U CN 205864377 U CN205864377 U CN 205864377U CN 201620694513 U CN201620694513 U CN 201620694513U CN 205864377 U CN205864377 U CN 205864377U
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- attenuator
- input
- outfan
- switch
- vva
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Abstract
The utility model discloses a kind of little stepping numerical-control attenuator, including: switch attenuator module, VVA, digital to analog converter, temperature sensor and FPGA；The input of described switch attenuator module is used for receiving radio-frequency input signals, the outfan of described switch attenuator module is connected with the input of described VVA, the input of described digital to analog converter is connected with the outfan of described FPGA, the outfan of described digital to analog converter is connected with the input of described VVA, described temperature sensor is connected with the input of described FPGA, the end that controls of described switch attenuator module is connected with the outfan of described FPGA, and the outfan of described VVA is used for exporting radio frequency output signal.This utility model improves the stability of system, meets user's request.
Description
Technical field
This utility model relates to technical field of micro communication, particularly to a kind of little stepping numerical-control attenuator.
Background technology
Attenuator is a kind of energy loss RF/Microwave element, and element internal contains resistive material, mainly meets the tendency
The fields such as Aeronautics and Astronautics, radar, electronic reconnaissance and antagonism.Partly radio communication management user wish can when attenuator uses
Regulate attenuation, the fixed value but ordinary attenuators the most on the market can only be decayed, it is impossible to meet user's request according to demand.
Utility model content
In view of this, this utility model provides a kind of little stepping numerical-control attenuator, which raises the stability of system, meets
User's request.
This utility model solves the problems referred to above by techniques below means:
One of the present utility model little stepping numerical-control attenuator, including: switch attenuator module, VVA, number
Weighted-voltage D/A converter, temperature sensor and FPGA；The input of described switch attenuator module is used for receiving radio-frequency input signals, described in open
The outfan closing attenuation module is connected with the input of described VVA, the input of described digital to analog converter and institute
The outfan stating FPGA connects, and the outfan of described digital to analog converter is connected with the input of described VVA, institute
State temperature sensor to be connected with the input of described FPGA, the outfan controlling end and described FPGA of described switch attenuator module
Connecting, described FPGA is additionally operable to receiving attenuation control signal, and it is defeated that the outfan of described VVA is used for exporting radio frequency
Go out signal.
Further, described switch attenuator module includes the first SP3T switch, the second SP3T switch, the first decay
Sheet and the second attenuator；The input of described first SP3T switch is used for receiving described radio-frequency input signals, and described first
First outfan of SP3T switch is connected with the first input end of described second SP3T switch, described first hilted broadsword three
Second outfan of throw switch is connected by the second input of described first attenuator with described second SP3T switch, institute
State the 3rd outfan of the first SP3T switch by described second attenuator and the 3rd of described second SP3T switch
Input connects, and the outfan of described second SP3T switch is connected with the input of described VVA, described
The end outfan all with described FPGA that controls controlling end and described second SP3T switch of the first SP3T switch connects
Connect.
Further, the attenuation of described first attenuator is 13dB.
Further, the attenuation of described second attenuator is 26dB.
Further, the attenuation range of described VVA is 0～17dB.
One of the present utility model little stepping numerical-control attenuator has the advantages that
This utility model provides a kind of little stepping numerical-control attenuator, the different temperature information that temperature sensor will collect
Send to FPGA, FPGA and determine switch selection signal according to the temperature information received and attenuation control signal, and then control the
The make position of the control end controlling end and the second SP3T switch of one SP3T switch, then radio-frequency input signals is through opening
Inputting to VVA after closing attenuation module decay, FPGA exports control signal to digital to analog converter simultaneously, through number
Weighted-voltage D/A converter inputs to VVA after carrying out digital-to-analogue conversion, to change the attenuation of VVA, real
Show because temperature-compensating changes the system attenuation error caused, improve the stability of system, meet user's request.
Accompanying drawing explanation
With embodiment, this utility model is further described below in conjunction with the accompanying drawings.
Fig. 1 is the schematic block circuit diagram of a kind of little stepping numerical-control attenuator of the present utility model.
Detailed description of the invention
Below with reference to accompanying drawing, this utility model is described in detail, as shown in Figure 1: the little stepping of one of the present embodiment
Numerical-control attenuator includes: switch attenuator module 10, VVA 11, digital to analog converter 12, temperature sensor 13 and
FPGA 14。
The input of described switch attenuator module 10 is used for receiving radio-frequency input signals, described switch attenuator module 10 defeated
Go out end to be connected with the input of described VVA 11, the input of described digital to analog converter 12 and described FPGA 14
Outfan connect, the outfan of described digital to analog converter 12 is connected with the input of described VVA 11, described
Temperature sensor 13 is connected with the input of described FPGA 14, the control end of described switch attenuator module 10 and described FPGA 14
Outfan connect, described FPGA 14 is additionally operable to receiving attenuation control signal, and the outfan of described VVA 11 is used
In output radio frequency output signal.
In the present embodiment, as it is shown in figure 1, described switch attenuator module 10 includes that the first SP3T switch 101, second is single
Cutter three throw switch the 102, first attenuator 103 and the second attenuator 104.
The input 1014 of described first SP3T switch 101 is used for receiving described radio-frequency input signals, and described first
First outfan 1011 of SP3T switch 101 is connected with the first input end 1021 of described second SP3T switch 102,
Second outfan 1012 of described first SP3T switch 101 is by described first attenuator 103 and described second hilted broadsword three
Second input 1022 of throw switch 102 connects, and the 3rd outfan 1013 of described first SP3T switch 101 is by described
Second attenuator 104 is connected with the 3rd input 1023 of described second SP3T switch 102, and described second SP3T is opened
The outfan 1024 of pass 102 is connected with the input of described VVA 11, described first SP3T switch 101
The end 1025 outfan all with described FPGA 14 that controls controlling end 1015 and described second SP3T switch 102 is connected.
Preferably, the attenuation of described first attenuator 103 is 13dB, and the attenuation of described second attenuator 104 is
26dB。
In the present embodiment, the attenuation range of described VVA 11 is 0～17dB.
Understanding through experiment, little stepping numerical-control attenuator of the present utility model is decayed according to switch attenuator module and variable voltage
Cooperating of device can realize decay stepping and the attenuation range of 0～40dB of 0.25dB, the most as shown in table 1.
Table 1
As shown in Table 1, the pad value in switch attenuator module 10 be 0dB, the attenuation of VVA 11 be 0～
During 14dB, the pad value of numerical-control attenuator is 0～14dB, and attenuated error is less than or equal to 4%；Decay in switch attenuator module 10
When value is 13dB, the attenuation of VVA 11 is 1～14dB, the pad value of numerical-control attenuator is 14～27dB, declines
Subtract error less than or equal to 5%；Pad value in switch attenuator module 10 is 26dB, the attenuation of VVA 11 is 1
～during 14dB, the pad value of numerical-control attenuator is 27～40dB, attenuated error is less than or equal to 6%.
This utility model provides a kind of little stepping numerical-control attenuator, the different temperature information that temperature sensor will collect
Send to FPGA, FPGA and determine switch selection signal according to the temperature information received and attenuation control signal, and then control the
The make position of the control end controlling end and the second SP3T switch of one SP3T switch, then radio-frequency input signals is through opening
Inputting to VVA after closing attenuation module decay, FPGA exports control signal to digital to analog converter simultaneously, through number
Weighted-voltage D/A converter inputs to VVA after carrying out digital-to-analogue conversion, to change the attenuation of VVA, real
Show because temperature-compensating changes the system attenuation error caused, improve the stability of system, meet user's request.
Finally illustrating, above example is only in order to illustrate the technical solution of the utility model and unrestricted, although ginseng
According to preferred embodiment, this utility model is described in detail, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, without deviating from objective and the model of technical solutions of the utility model
Enclosing, it all should be contained in the middle of right of the present utility model.
Claims (5)
1. one kind little stepping numerical-control attenuator, it is characterised in that: including: switch attenuator module, VVA, digital-to-analogue turn
Parallel operation, temperature sensor and FPGA；
The input of described switch attenuator module is used for receiving radio-frequency input signals, the outfan of described switch attenuator module and institute
The input stating VVA connects, and the input of described digital to analog converter is connected with the outfan of described FPGA, institute
The input of the outfan and described VVA of stating digital to analog converter is connected, described temperature sensor and described FPGA
Input connect, described switch attenuator module control end be connected with the outfan of described FPGA, described FPGA is additionally operable to connect
Receiving attenuation control signal, the outfan of described VVA is used for exporting radio frequency output signal.
One the most according to claim 1 little stepping numerical-control attenuator, it is characterised in that: described switch attenuator module includes
First SP3T switch, the second SP3T switch, the first attenuator and the second attenuator；
The input of described first SP3T switch is used for receiving described radio-frequency input signals, described first SP3T switch
The first outfan with described second SP3T switch first input end is connected, described first SP3T switch second
Outfan is connected by the second input of described first attenuator with described second SP3T switch, described first hilted broadsword three
3rd outfan of throw switch is connected by the 3rd input of described second attenuator with described second SP3T switch, institute
The outfan stating the second SP3T switch is connected with the input of described VVA, and described first SP3T is opened
The end outfan all with described FPGA that controls controlling end and described second SP3T switch closed is connected.
One the most according to claim 2 little stepping numerical-control attenuator, it is characterised in that: the decay of described first attenuator
Amount is 13dB.
One the most according to claim 3 little stepping numerical-control attenuator, it is characterised in that: the decay of described second attenuator
Amount is 26dB.
5. according to the one little stepping numerical-control attenuator described in any one of claim 1-4, it is characterised in that: described variable voltage
The attenuation range of attenuator is 0～17dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620694513.1U CN205864377U (en) | 2016-07-01 | 2016-07-01 | A kind of little stepping numerical-control attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620694513.1U CN205864377U (en) | 2016-07-01 | 2016-07-01 | A kind of little stepping numerical-control attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205864377U true CN205864377U (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620694513.1U Expired - Fee Related CN205864377U (en) | 2016-07-01 | 2016-07-01 | A kind of little stepping numerical-control attenuator |
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| CN (1) | CN205864377U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801903A (en) * | 2018-02-27 | 2020-10-20 | 日本电气株式会社 | Equalizer device, communication system, and equalizing method |
-
2016
- 2016-07-01 CN CN201620694513.1U patent/CN205864377U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111801903A (en) * | 2018-02-27 | 2020-10-20 | 日本电气株式会社 | Equalizer device, communication system, and equalizing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20180701 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |