CN204556835U - A kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver - Google Patents
A kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver Download PDFInfo
- Publication number
- CN204556835U CN204556835U CN201520170969.3U CN201520170969U CN204556835U CN 204556835 U CN204556835 U CN 204556835U CN 201520170969 U CN201520170969 U CN 201520170969U CN 204556835 U CN204556835 U CN 204556835U
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- Prior art keywords
- logarithmic amplifier
- logarithmic
- amplifier
- circuit
- filtering circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver, and circuit comprises transistor buffers, first filtering circuit, second filtering circuit, first logarithmic amplifier, second logarithmic amplifier, 3rd logarithmic amplifier and the 4th logarithmic amplifier, the detection of the first logarithmic amplifier and the 3rd logarithmic amplifier exports after crystal impact damper, and the second logarithmic amplifier, the detection of the 4th logarithmic amplifier exports the common logarithm that formed and exports, and be supplied to base band signal process and control module, suppress for follow-up signal transacting and continuous wave, intermediate frequency 63MHz modulation signal is through the first logarithmic amplifier, second filtering circuit, 3rd logarithmic amplifier, 4th logarithmic amplifier constitutes video frequency output after amplifying, and technique effect is this logarithmic amplifying circuit through test, and circuit working is stablized, and dependable performance, has been successfully applied to Tacan uphole equipment, on the equipment receiver such as mobile unit and distance-measuring equipment, achieve good technical benefits and economic benefit.
Description
Technical field
The utility model relates to ground navigation technology, particularly a kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver, is applicable to ground Tacan, DME equipment.
Background technology
The logarithmic amplifying circuit being applied to Tacan uphole equipment receiver in the past adopts two-stage wide-band logarithmic amplifier, gain is low, noise is large, can not meet the requirement of Tacan uphole equipment receiver high sensitivity, great dynamic range, how to address this problem the problem just becoming those skilled in the art and will study and solve.
Utility model content
In order to overcome the deficiencies in the prior art, low for existing gain, the problem that noise is large, a kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver is provided, concrete technical scheme is, a kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver, comprise transistor buffers, first filtering circuit, second filtering circuit, first logarithmic amplifier, second logarithmic amplifier, 3rd logarithmic amplifier and the 4th logarithmic amplifier, it is characterized in that: the first logarithmic amplifier and first, second filtering circuit and transistor buffers connect, it is 63MHz signal input end of intermediate frequency simultaneously, 3rd logarithmic amplifier is connected with transistor buffers and the 4th logarithmic amplifier, and the 4th logarithmic amplifier is video output terminals simultaneously, second logarithmic amplifier is connected with the first wave filter and transistor buffers, is connected simultaneously together constitutes logarithm output terminal with the 4th amplifier.The detection of the first logarithmic amplifier and the 3rd logarithmic amplifier exports after crystal impact damper, export the common logarithm that formed with the detection of the second logarithmic amplifier, the 4th logarithmic amplifier to export, be supplied to base band signal process and control module, suppress for follow-up signal transacting and continuous wave, intermediate frequency 63MHz modulation signal constitutes video frequency output through the first logarithmic amplifier, the second filtering circuit, the 3rd logarithmic amplifier, the 4th logarithmic amplifier after amplifying.
This logarithmic amplifying circuit of the utility model technique effect is through test, and circuit working is stablized, and dependable performance, has been successfully applied on the equipment receivers such as Tacan uphole equipment, mobile unit and distance-measuring equipment (DME), has achieved good technical benefits and economic benefit.
Accompanying drawing explanation
Fig. 1 is that the utility model circuit connects block diagram.
Embodiment
This circuit adopts continuous amplitude limit detection logarithmic amplification principle, adopts level Four logarithmic amplification, increases sensitivity and the dynamic range of this circuit.Circuit comprises transistor buffers, the first filtering circuit, the second filtering circuit, the first logarithmic amplifier, the second logarithmic amplifier, the 3rd logarithmic amplifier and the 4th logarithmic amplifier, first logarithmic amplifier is connected with first, second filtering circuit and transistor buffers, is 63MHz signal input end of intermediate frequency simultaneously; 3rd logarithmic amplifier is connected with transistor buffers and the 4th logarithmic amplifier, and the 4th logarithmic amplifier is video output terminals and logarithm output terminal simultaneously; Second logarithmic amplifier is connected with the first wave filter and transistor buffers, is connected simultaneously together constitutes logarithm output terminal with the 4th amplifier.The detection of the first logarithmic amplifier and the 3rd logarithmic amplifier exports after crystal impact damper, export the common logarithm that formed with the detection of the second logarithmic amplifier, the 4th logarithmic amplifier to export, be supplied to base band signal process and control module, suppress for follow-up signal transacting and continuous wave, intermediate frequency 63MHz modulation signal exports after the first logarithmic amplifier, the second filtering circuit, the 3rd logarithmic amplifier, amplification, suppresses after detection for facing radio frequency channel.
This circuit adds the first filtering circuit, the second filtering circuit, reduces noise, improves signal to noise ratio (S/N ratio).
This circuit engineering index is
1, frequency of operation: 63MHz.
2, dynamic range: 80 dB.
3, small-signal gain: 72dB.
4, video frequency output: 8mV
pp
5, logarithmic precision: 0.5dB.
6, supply voltage: 6V.
7, signal level/noise level is greater than 2.
8, operating temperature range :-40 DEG C ~+55 DEG C.
Claims (1)
1. one kind is applied to the logarithmic amplifying circuit of Tacan uphole equipment receiver, comprise transistor buffers, the first filtering circuit, the second filtering circuit, the first logarithmic amplifier, the second logarithmic amplifier, the 3rd logarithmic amplifier and the 4th logarithmic amplifier, it is characterized in that: the first logarithmic amplifier is connected with first, second filtering circuit and transistor buffers, be 63MHz signal input end of intermediate frequency simultaneously; 3rd logarithmic amplifier is connected with transistor buffers and the 4th logarithmic amplifier, and the 4th logarithmic amplifier is video output terminals; Second logarithmic amplifier is connected with the first wave filter and transistor buffers, be connected with the 4th amplifier simultaneously, the detection of the first logarithmic amplifier and the 3rd logarithmic amplifier exports after crystal impact damper, export the common logarithm that formed with the detection of the second logarithmic amplifier, the 4th logarithmic amplifier to export, be supplied to base band signal process and control module, suppress for follow-up signal transacting and continuous wave; Intermediate frequency 63MHz modulation signal constitutes video frequency output through the first logarithmic amplifier, the second filtering circuit, the 3rd logarithmic amplifier, the 4th logarithmic amplifier after amplifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170969.3U CN204556835U (en) | 2015-03-25 | 2015-03-25 | A kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170969.3U CN204556835U (en) | 2015-03-25 | 2015-03-25 | A kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204556835U true CN204556835U (en) | 2015-08-12 |
Family
ID=53831929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520170969.3U Withdrawn - After Issue CN204556835U (en) | 2015-03-25 | 2015-03-25 | A kind of logarithmic amplifying circuit being applied to Tacan uphole equipment receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204556835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730547A (en) * | 2015-03-25 | 2015-06-24 | 天津七六四通信导航技术有限公司 | Logarithmic amplifying circuit applied to receiver of Tacan ground device |
-
2015
- 2015-03-25 CN CN201520170969.3U patent/CN204556835U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104730547A (en) * | 2015-03-25 | 2015-06-24 | 天津七六四通信导航技术有限公司 | Logarithmic amplifying circuit applied to receiver of Tacan ground device |
| CN104730547B (en) * | 2015-03-25 | 2017-06-09 | 天津七六四通信导航技术有限公司 | It is applied to the logarithmic amplifying circuit of Tacan ground installation receiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150812 Effective date of abandoning: 20170609 |
|
| AV01 | Patent right actively abandoned |