CN205792233U - A kind of vehicle-mounted reverse image CVBS signal protection filter circuit - Google Patents
A kind of vehicle-mounted reverse image CVBS signal protection filter circuit Download PDFInfo
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- CN205792233U CN205792233U CN201620480237.9U CN201620480237U CN205792233U CN 205792233 U CN205792233 U CN 205792233U CN 201620480237 U CN201620480237 U CN 201620480237U CN 205792233 U CN205792233 U CN 205792233U
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Abstract
This utility model provides a kind of vehicle-mounted reverse image CVBS signal protection filter circuit, including the diode circuit being sequentially connected with and filter circuit, diode circuit includes the diode branch being connected in parallel, each diode branch includes the two-way Transient Suppression Diode that differential concatenation connects, and filter circuit includes connecting the filter-capacitor circuit between power input and CVBS signal input part；Connect the filter-capacitor circuit between power input and ground wire, between CVBS signal input part and ground wire；By arranging diode circuit and filter circuit simultaneously, and in diode circuit, it is electrically connected with the two-way Transient Suppression Diode that differential concatenation connects, during product is actually used, the problem that can preferably solve electromagnetic interference by two-way Transient Suppression Diode and filter capacitor, suppress and filter the overvoltage that automobile power source mouth runs into, the various transient pulses crossed in stream, backward voltage impact and ISO7637 2, just interference is preferably minimized from power input, reaches preferably to protect and filter effect.
Description
[technical field]
This utility model relates to protecting filter circuit technical field, particularly relates to that a kind of protection effect is good, ensure vapour
Car can reach the vehicle-mounted reverse image CVBS signal protection filter circuit of electromagnetic compatibility.
[background technology]
Increasing Electronic Control, communication, navigation, monitors and the electronic device of the various functions such as display should
Use in Automobile Design, based on this development trend, in actual R&D process, it is necessary to consider these electronic installation works
Electrical and electromagnetic environment residing when making, the electronic equipment of surrounding may be worked the mischief by it, simultaneously also by car
Carry other electrical equipments produce electromagnetic interference, the function of electronic installation may be caused to reduce, of short duration fault even
Permanent damages, these electromagnetic interference are often from ignition system, electromotor and commutator system, motor and hold
The electric power systems such as row device, and the frequency band of electromagnetic interference is the widest, and can be by the way of conduction, radiation, coupling
In vehicle electronics parts or system, affect it properly functioning, in consideration of it, test is big electric in ISO 11452-4
In the stream test process such as injection, RI, the Radio frequency interference on actual car can be simulated and be just coupled on wire harness jamming equipment
Often work, the interference signal of these simulations is applicable to the road vehicle of various dynamical system in a practical situation, for
Guarantee that electrical equipment normally works, from from the electric transient Conduction Interference pulse on power line, commercial car
The CVBS signal protection filter design of reversing shooting becomes the emphasis in automobile electronics design.
The filter design of reverse image is essentially all and only uses electric capacity by the most general producer, and makes actual
Overvoltage, the various transient states crossed in stream, backward voltage impact and ISO7637-2 can be run into middle automobile power source mouth
Pulse, these interference only can not be completely inhibited and filter by electric capacity, and interference enters circuit then can cause product
Emc issue, make properties of product unstable, car load affect product works.
Based on the problems referred to above, the most preferably solve the emc issue of product, from power input
Just interference being preferably minimized, reach preferably to protect and filter effect, those skilled in the art has been carried out in a large number
Research and development and experimental work.
[utility model content]
For overcoming the problem existing for prior art, a kind of protection effect of this utility model offer is good, ensure automobile
The vehicle-mounted reverse image CVBS signal protection filter circuit of electromagnetic compatibility can be reached.
This utility model solves the scheme of technical problem and is to provide the protection filter of a kind of vehicle-mounted reverse image CVBS signal
Wave circuit, including the diode circuit being sequentially connected with and filter circuit, described diode circuit includes being connected in parallel
At least two diode branch, each diode branch includes that the two-way transient state that least one set differential concatenation connects presses down
Diode processed；
Described filter circuit includes the filtering between at least one connection power input and CVBS signal input part
Condenser network, and this filter-capacitor circuit includes at least one filter capacitor；At least one connects power input
And the filter-capacitor circuit between ground wire；At least one connects the filtering between CVBS signal input part and ground wire
Condenser network；Each filter-capacitor circuit is connected in parallel；
It is serially connected with magnetic bead on described power input line and CVBS signal input line.
Preferably, the magnetic bead in described filter circuit and filter-capacitor circuit are combined into the filtering of π type.
Preferably, described filter circuit connects the filtered electrical between power input and CVBS signal input part
In capacitive circuit, the quantity of filter capacitor is two, and these two filter capacitors are connected in series.
Preferably, described filter circuit connects filtering in the filter-capacitor circuit between power input and ground wire
The quantity of electric capacity is one.
Preferably, described filter circuit connects the filter-capacitor circuit between CVBS signal input part and ground wire
The quantity of middle filter capacitor is one.
Preferably, in described diode circuit, each diode branch includes the two-way transient state that one group of differential concatenation connects
Suppression diode.
Compared with prior art, a kind of vehicle-mounted reverse image CVBS signal of this utility model protection filter circuit leads to
Diode circuit and filter circuit are set after simultaneously, and in diode circuit, are electrically connected with what differential concatenation connected
Two-way Transient Suppression Diode, is connected in parallel multiple filter capacitor in filter circuit, the actually used process of product
In, the problem that can preferably be solved electromagnetic interference by two-way Transient Suppression Diode and filter capacitor, suppression
With the various winks filtered in overvoltage, mistake stream, backward voltage impact and the ISO7637-2 that automobile power source mouth runs into
State pulse, is just preferably minimized interference from power input, reaches preferably to protect and filter effect.
[accompanying drawing explanation]
Fig. 1 is that the circuit structure of a kind of vehicle-mounted reverse image CVBS signal of this utility model protection filter circuit shows
It is intended to.
[detailed description of the invention]
For making the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing and reality
Execute example, this utility model is further elaborated.Should be appreciated that specific embodiment described herein
It is used only for explaining this utility model, is not used to limit this utility model.
Referring to Fig. 1, this utility model a kind of vehicle-mounted reverse image CVBS signal protection filter circuit 1 includes depending on
The diode circuit of secondary connection and filter circuit, described diode circuit includes at least two two poles being connected in parallel
Pipe branch road, each diode branch include two-way Transient Suppression Diode that least one set differential concatenation connects (D1,
D2)；Described filter circuit includes the filtering between at least one connection power input and CVBS signal input part
Condenser network, and this filter-capacitor circuit includes at least one filter capacitor；At least one connects power input
And the filter-capacitor circuit between ground wire；At least one connects the filtering between CVBS signal input part and ground wire
Condenser network；Each filter-capacitor circuit is connected in parallel；Go here and there on described power input line and CVBS signal input line
It is connected to magnetic bead.
By arranging diode circuit and filter circuit simultaneously, and in diode circuit, it is electrically connected with differential concatenation
The two-way Transient Suppression Diode connected, is connected in parallel multiple filter capacitor in filter circuit, the actual of product makes
During with, can preferably solve asking of electromagnetic interference by two-way Transient Suppression Diode and filter capacitor
Topic, suppresses and filters in overvoltage, mistake stream, backward voltage impact and the ISO7637-2 that automobile power source mouth runs into
Various transient pulses, just interference is preferably minimized from power input, reaches preferably to protect and filter effect.
Preferably, the magnetic bead in described filter circuit and filter-capacitor circuit are combined into the filtering of π type.
Preferably, described filter circuit connects the filtered electrical between power input and CVBS signal input part
In capacitive circuit, the quantity of filter capacitor is two, and these two filter capacitors are connected in series.
Preferably, described filter circuit connects filtering in the filter-capacitor circuit between power input and ground wire
The quantity of electric capacity is one.
Preferably, described filter circuit connects the filter-capacitor circuit between CVBS signal input part and ground wire
The quantity of middle filter capacitor is one.
Preferably, in described diode circuit, each diode branch includes the two-way transient state that one group of differential concatenation connects
Suppression diode, the two-way Transient Suppression Diode that differential concatenation connects can preferably suppress and filtering interfering arteries and veins
Punching.
The protection filter circuit in this programme is used then can well to suppress the power port of product and the wink of signal port
State interference and the filtering of High-frequency Interference, such as pass transient state conducted immunity, electrostatic, etc. interference, the most well do
Arrive the filtering to High-frequency Interference, the shake of image, the water that actual vehicle-mounted interference signal causes can have been solved simultaneously
Ripple, splashette etc. interference problem.
Compared with prior art, a kind of vehicle-mounted reverse image CVBS signal of this utility model protection filter circuit 1
By arranging diode circuit and filter circuit simultaneously, and in diode circuit, it is electrically connected with differential concatenation connection
Two-way Transient Suppression Diode, filter circuit is connected in parallel multiple filter capacitor, the actually used mistake of product
Cheng Zhong, the problem that can preferably be solved electromagnetic interference by two-way Transient Suppression Diode and filter capacitor, is pressed down
System and filter overvoltage that automobile power source mouth runs into, cross in stream, backward voltage impact and ISO7637-2 various
Transient pulse, is just preferably minimized interference from power input, reaches preferably to protect and filter effect.
Above-described this utility model embodiment, is not intended that the restriction to this utility model protection domain.
Any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should comprise
Within claims of the present utility model.
Claims (6)
1. a vehicle-mounted reverse image CVBS signal protection filter circuit, it is characterised in that: include being sequentially connected with
Diode circuit and filter circuit, described diode circuit includes that at least two diodes being connected in parallel prop up
Road, each diode branch includes the two-way Transient Suppression Diode that least one set differential concatenation connects；
Described filter circuit includes the filtering between at least one connection power input and CVBS signal input part
Condenser network, and this filter-capacitor circuit includes at least one filter capacitor；At least one connects power input
And the filter-capacitor circuit between ground wire；At least one connects the filtering between CVBS signal input part and ground wire
Condenser network；Each filter-capacitor circuit is connected in parallel；
It is serially connected with magnetic bead on described power input line and CVBS signal input line.
A kind of vehicle-mounted reverse image CVBS signal the most as claimed in claim 1 protection filter circuit, its feature
It is: magnetic bead and filter-capacitor circuit in described filter circuit are combined into the filtering of π type.
A kind of vehicle-mounted reverse image CVBS signal the most as claimed in claim 2 protection filter circuit, its feature
It is: described filter circuit connects the filter-capacitor circuit between power input and CVBS signal input part
The quantity of middle filter capacitor is two, and these two filter capacitors are connected in series.
A kind of vehicle-mounted reverse image CVBS signal the most as claimed in claim 2 protection filter circuit, its feature
It is: described filter circuit connects filter capacitor in the filter-capacitor circuit between power input and ground wire
Quantity is one.
A kind of vehicle-mounted reverse image CVBS signal the most as claimed in claim 2 protection filter circuit, its feature
It is: described filter circuit connects in the filter-capacitor circuit between CVBS signal input part and ground wire and filters
The quantity of electric capacity is one.
A kind of vehicle-mounted reverse image CVBS signal the most as claimed in claim 1 protection filter circuit, its feature
It is: in described diode circuit, each diode branch includes the two-way transient state suppression two that one group of differential concatenation connects
Pole is managed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620480237.9U CN205792233U (en) | 2016-05-24 | 2016-05-24 | A kind of vehicle-mounted reverse image CVBS signal protection filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620480237.9U CN205792233U (en) | 2016-05-24 | 2016-05-24 | A kind of vehicle-mounted reverse image CVBS signal protection filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205792233U true CN205792233U (en) | 2016-12-07 |
Family
ID=58113567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620480237.9U Active CN205792233U (en) | 2016-05-24 | 2016-05-24 | A kind of vehicle-mounted reverse image CVBS signal protection filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205792233U (en) |
-
2016
- 2016-05-24 CN CN201620480237.9U patent/CN205792233U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 T3B5-505A Software Building No. 11 South 7 High-tech Road, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen SES Technology Co., Ltd. Address before: 518000 Room 401 5, Fengyun Science and Technology Building, No. 5 Industrial Zone, North District, Nanshan High-tech Zone, Shenzhen City, Guangdong Province (office only) Patentee before: Shenzhen City Sheng technology Limited by Share Ltd |