CN2262779Y - High-frequency fixed attenuator - Google Patents
High-frequency fixed attenuator Download PDFInfo
- Publication number
- CN2262779Y CN2262779Y CN 96229335 CN96229335U CN2262779Y CN 2262779 Y CN2262779 Y CN 2262779Y CN 96229335 CN96229335 CN 96229335 CN 96229335 U CN96229335 U CN 96229335U CN 2262779 Y CN2262779 Y CN 2262779Y
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- CN
- China
- Prior art keywords
- contact pins
- circuit board
- electronic component
- utility
- model
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a high-frequency fixed attenuator, which is composed of a plastic outer shell (1), a base (2), a circuit board (3), electronic elements (4), contact pins (5), and a jack (6). The utility model is characterized in that three contact pins are fixedly arranged on the board of the base (2) of an outer shell. The three contact pins are connected with the circuit board (3). Three electronic elements are arranged on the circuit board. One end of each of the three electronic elements is respectively connected with the three contact pins. The other end of each of the three electronic elements are mutually connection in parallel. The utility model has the functions that excessive input signals attenuate with a proper order of magnitude and nonlinear distortion and crosstalk modulation jamming can be reduced. The utility model has the advantages of high precision, small size, the adoption of the structure of the contact pins and the jack, and convenient operation.
Description
The utility model relates to the attenuator in a kind of television signal transmission system, particularly a kind of high frequency fixed attenuator.
As everyone knows, in television system, attenuator is mainly used in: 1. make incoming signal level promptly prevent the amplifier nonoverload after by attenuator incoming signal level before the amplifier input, satisfy the requirement of amplifier output signal level again.2. thereby the incoming level signal that before the blender input height is differed makes the fidelity of several roads incoming signal level in equating substantially to guarantee to mix after by attenuator.Adopt the high frequency variable attenuator in the market mostly, and high frequency fixed head plug-in unit.Adopt the high frequency variable attenuator, precision is low, can not guarantee that attenuated input signal is suitable, adopts printing forme plug-in unit volume big, uses inconvenient.
For the certainly the problems referred to above that are situated between, the purpose of this utility model provides a kind of high frequency fixed attenuator.Stock and IC network element are organically combined, and it can make strong excessively input signal the decay of one suitable quantity level easily, reduces nonlinear distortion and cross (talk) modulated interferer.
In order to achieve the above object.The utility model has been taked following technical proposal: be made up of plastic casing (1), base (2), circuit board (3), electronic component (4), contact pin (5), jack (6), it is characterized in that on outer casing base (2) plate three contact pins being housed fixedly, three contact pins and circuit board (3) join, three electronic components have been loaded onto on the circuit board, three electronic component one ends and three contact pins join respectively, and three electronic component other ends are connected with each other.See Fig. 1, wherein the electronic component on two limits is respectively input, output resistance (R among Fig. 1
1, R
2), middle electronic component is earth resistance (R among Fig. 1
3) like this by the combination with the different resistances of earth resistance of input, output resistance, make incoming level signal (1 end among Fig. 3) decay to the outputs level signals (2 ends among Fig. 3) of needed high-fidelity.Electronic component adopts integrated ceramic substrate thick film circuit or integrated flat shape electronic component to form.Three contact pin positions all maintain a certain distance on outer casing base (2) plate.
Owing to adopted stock and IC network element in the above-mentioned solution, organically to combine, it can do suitable quantity level decay with crossing strong input signal easily, reduces nonlinear distortion and cross (talk) modulated interferer.The utility model precision height, volume is little, adopts the contact pin jack structure, and is easy to use.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is the schematic diagram of the structure of the utility model high frequency fixed attenuator
Fig. 2 is the utility model high frequency fixed attenuator T type or π type electrical schematic diagram
Fig. 3 is the wiring schematic diagram of the utility model high frequency figure fixed attenuator
Referring to Fig. 1, form by plastic casing (1), base (2), circuit board (3), electronic component (4), contact pin (5), jack (6), on outer casing base (2) plate three contact pins are housed fixedly, three contact pins and circuit board (3) join, three electronic components have been loaded onto on the circuit board, three electronic component one ends and three contact pins join respectively, and three electronic component other ends are connected with each other.
Referring to Fig. 2, the most typical electrical schematic diagram that Fig. 2 illustrates high frequency attenuator has T type and two kinds of forms of π type.In order to realize and the impedance matching of characteristic impedance that the attenuator side circuit adopts R.L.C distributed network or integrated flat shape electronic component composition on the ceramic substrate.
Referring to Fig. 3, under the impedance matching situation, can be used as " passive four terminal network " next folding that divides that a resistance is formed, for this reason, provided the wiring schematic diagram of attenuator.
Claims (3)
1. high frequency fixed attenuator, form by plastic casing (1), base (2), circuit board (3), electronic component (4), contact pin (5), jack (6), it is characterized in that on outer casing base (2) plate three contact pins being housed fixedly, three contact pins and circuit board (3) join, three electronic components have been loaded onto on the circuit board, three electronic component one ends and three contact pins join respectively, and three electronic component other ends are connected with each other.
2. high frequency fixed attenuator as claimed in claim 1 is characterized in that electronic component adopts integrated ceramic substrate thick film circuit or integrated flat shape electronic component to form.
3. high frequency fixed attenuator according to claim 1 is characterized in that three contact pin positions all maintain a certain distance on outer casing base (2) plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96229335 CN2262779Y (en) | 1996-02-15 | 1996-02-15 | High-frequency fixed attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96229335 CN2262779Y (en) | 1996-02-15 | 1996-02-15 | High-frequency fixed attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2262779Y true CN2262779Y (en) | 1997-09-17 |
Family
ID=33907014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96229335 Expired - Fee Related CN2262779Y (en) | 1996-02-15 | 1996-02-15 | High-frequency fixed attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2262779Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102017409A (en) * | 2008-09-19 | 2011-04-13 | 艾格瑞系统有限公司 | Systems and methods for reducing low frequency loss in a magnetic storage device |
| CN101546989B (en) * | 2008-03-26 | 2014-09-17 | 深圳市研通高频技术有限公司 | Variable attenuator |
-
1996
- 1996-02-15 CN CN 96229335 patent/CN2262779Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546989B (en) * | 2008-03-26 | 2014-09-17 | 深圳市研通高频技术有限公司 | Variable attenuator |
| CN102017409A (en) * | 2008-09-19 | 2011-04-13 | 艾格瑞系统有限公司 | Systems and methods for reducing low frequency loss in a magnetic storage device |
| US8441753B2 (en) | 2008-09-19 | 2013-05-14 | Agere Systems Inc. | Systems and methods for reducing low frequency loss in a magnetic storage device |
| CN102017409B (en) * | 2008-09-19 | 2014-02-19 | 艾格瑞系统有限公司 | Systems and methods for reducing low frequency loss in a magnetic storage device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |