CN203039675U - TACAN receiver continuous wave suppression function circuit - Google Patents
TACAN receiver continuous wave suppression function circuit Download PDFInfo
- Publication number
- CN203039675U CN203039675U CN 201220719126 CN201220719126U CN203039675U CN 203039675 U CN203039675 U CN 203039675U CN 201220719126 CN201220719126 CN 201220719126 CN 201220719126 U CN201220719126 U CN 201220719126U CN 203039675 U CN203039675 U CN 203039675U
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- module
- continuous wave
- attenuator
- tacan
- receiver
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Abstract
The utility model relates to a TACAN receiver continuous wave suppression function circuit which comprises a single chip microcomputer, an A/D sampling module, a D/A transformation module, a front-end attenuator module and a logarithm intermediate frequency module. The front-end attenuator module is connected with the single chip microcomputer and one end of the D/A transformation module through the A/D sampling module in turn. The other end of the D/A transformation module is connected with the front-end attenuator module. The TACAN receiver continuous wave suppression function circuit provided by the utility model has the advantages that the size of the power of continuous waves is detected and is given in the form of high and low levels; according to the size of the power of continuous waves, the front-end attenuator is controlled and the sensitivity is reduced; and continuous wave are attenuated beyond the sensitivity of a receiver, thus the influence of continuous waves on a system is eliminated.
Description
Technical field
The utility model relates to a kind of Tacan receiver continuous wave inhibit feature circuit.Be used for novel Tacan earth station, novel DME equipment.
Background technology
Airborne Tacan can be attended by the continuous wave of certain power when the emission of platform earthward request signal, influence the operate as normal of ground Tacan, even causes the ground Tacan can't operate as normal.Therefore the earth station receiver will have the function that continuous wave suppresses.
Summary of the invention
In view of the situation of prior art, the utility model provides a kind of Tacan receiver continuous wave inhibit feature circuit.
The utility model for achieving the above object, the technical scheme that adopts is: a kind of Tacan receiver continuous wave inhibit feature circuit, it is characterized in that: comprise amplification module in single-chip microcomputer, A/D sampling module, D/A conversion module, front end attenuator module, the logarithm, described front end attenuator module is connected with an end of single-chip microcomputer and D/A conversion module successively by the A/D sampling module, and the other end of described D/A conversion module is connected with the front end attenuator module.
The beneficial effects of the utility model are: detect the continuous wave power size, provide with the high-low level form.According to the size of continuous wave power, the attenuator of control front end, desensitization decays to continuous wave beyond the receiver sensitivity, eliminates continuous wave to the influence of system.
Description of drawings
Fig. 1 is that circuit of the present utility model connects block diagram;
Fig. 2 suppresses the circuit working flow chart for the utility model continuous wave.
Embodiment
As shown in Figure 1, 2, a kind of Tacan receiver continuous wave inhibit feature circuit, comprise amplification module in single-chip microcomputer, A/D sampling module, D/A conversion module, front end attenuator module, the logarithm, the front end attenuator module is connected with an end of single-chip microcomputer and D/A conversion module successively by the A/D sampling module, and the other end of D/A conversion module is connected with the front end attenuator module.
Operation principle
Tacan receiver front end module has voltage-controlled attenuator, can control signal decay, reduce receiver sensitivity, when front end attenuator control voltage increased, attenuation increased, when control voltage reduced, attenuation reduced.Amplification module has the detection output function in the logarithm, when the input of different capacity continuous wave is arranged, can export different direct current high-low levels, and when the input continuous wave power increased, output dc voltage increased, and when the input continuous wave power reduced, the output DC deflation was little.Whole system is by Single-chip Controlling.
When the Tacan receiver is subjected to the continuous wave interference, the amplification module output DC is flat in the logarithm, through low-pass filtering, DC level is transported to the A/D sampling module, through after the conversion of A/D sampling module DC level being converted to digital signal, be transported in the single-chip computer control system; Single-chip computer control system is through judging, output control data through the D/A conversion module, exports a high level, control front end attenuator, and the reduction receiver sensitivity is up to continuous wave being decayed to beyond the receiver sensitivity.
Native system belongs to closed-loop control system, namely controls front-end circuit with back end signal.Increasing receiver front end attenuator attenuation can influence continuous wave detection level, makes and detects the level attenuating; Reduce receiver front end attenuator attenuation, make and detect the level increase.Conversely, continuous wave detects level and reduces, and can cause that front end attenuator attenuation increases; The detection level increases, and can cause to front end attenuator attenuation to reduce.For realizing the continuous wave inhibit feature, progressively increase attenuation or progressively reduce attenuation, control within the suitable scope up to continuous wave being detected level.This circuit continuous wave the most at last detects level equalization between 1.6 ± 0.02V.
Claims (1)
1. Tacan receiver continuous wave inhibit feature circuit, it is characterized in that: comprise amplification module in single-chip microcomputer, A/D sampling module, D/A conversion module, front end attenuator module, the logarithm, described front end attenuator is connected with an end of single-chip microcomputer and D/A conversion module successively by the A/D sampling module, and the other end of described D/A conversion module is connected with the front end attenuator module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220719126 CN203039675U (en) | 2012-12-24 | 2012-12-24 | TACAN receiver continuous wave suppression function circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220719126 CN203039675U (en) | 2012-12-24 | 2012-12-24 | TACAN receiver continuous wave suppression function circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039675U true CN203039675U (en) | 2013-07-03 |
Family
ID=48691760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220719126 Expired - Lifetime CN203039675U (en) | 2012-12-24 | 2012-12-24 | TACAN receiver continuous wave suppression function circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039675U (en) |
-
2012
- 2012-12-24 CN CN 201220719126 patent/CN203039675U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |
|
| CX01 | Expiry of patent term |