CN210536776U - Video stream switching equipment with multiplexing function - Google Patents
Video stream switching equipment with multiplexing function Download PDFInfo
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- CN210536776U CN210536776U CN201921693623.6U CN201921693623U CN210536776U CN 210536776 U CN210536776 U CN 210536776U CN 201921693623 U CN201921693623 U CN 201921693623U CN 210536776 U CN210536776 U CN 210536776U
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- capacitor
- main control
- clock module
- video stream
- stream switching
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Abstract
The utility model discloses a video stream switching equipment of function is used repeatedly in area, including the main control unit, the main control unit is equipped with the main control board, the main control board includes CPU treater, clock module, the clock module with CPU treater electric connection still including acting on the power filter circuit of clock module. The utility model discloses an increased power filter circuit between electrical power generating system and clock module, kept apart the impact of rapid change's transient current to mainboard electrical power generating system through it to electrical power generating system's reliability has been improved.
Description
Technical Field
The utility model relates to a video stream switching equipment of multiplexing function in area.
Background
Safe broadcasting is very important in the field of broadcast television. The safe broadcasting relates to a plurality of fields such as material manufacturing, content broadcasting, signal transmission and the like. The field of broadcast television has now been converted from analog to digital signals. The original analog signal broadcasting system has also been replaced by a digital signal broadcasting system. The core control device is mainly a main control unit, namely a main controller, and the core of the main controller is a main control board.
The main control boards on the market are various, the functions are very complete, and the requirement on the stability of the main control boards is very high in the broadcasting field. The clock module that the main control board carried has a higher requirement to the ripple parameter of power to its current consumption is great, when the multiplexed output of clock circuit overturns simultaneously, can produce great transient current demand to electrical power generating system, and this kind of high frequency transient reflux current is just bigger the clock overturns sooner, thereby can influence main control board electrical power generating system's stability.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the technical problem who exists more than, provide a video stream switching equipment of band reuse function.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
The utility model provides a video stream switching equipment of band reuse function, includes the main control unit, the main control unit is equipped with the main control board, the main control board includes CPU treater, clock module with CPU treater electric connection still includes and acts on the power filter circuit of clock module, power filter circuit includes inductance L1Capacitor C1Capacitor C2Capacitor C3Said inductance L1Through a parallel capacitor C1Capacitor C2Capacitor C3Then connected with VCC pin of clock module, capacitor C1Capacitor C2Capacitor C3And the other pin after parallel connection is connected with the GND pin of the clock module and is grounded in common.
The capacitor C1The capacity is 4.7 muF for tantalum capacitor or high frequency electrolytic capacitor.
The capacitor C2The capacitance was 0.1. mu.F for a ceramic capacitor.
The capacitor C3The capacitance was 0.1. mu.F for a ceramic capacitor.
The inductance L1Are magnetic beads.
The utility model discloses an increased power filter circuit between electrical power generating system and clock module, kept apart the impact of rapid change's transient current to mainboard electrical power generating system through it to electrical power generating system's reliability has been improved.
Drawings
FIG. 1: the utility model discloses power filter circuit's circuit schematic diagram.
FIG. 2: characteristic impedance curve of three-capacitor parallel circuit.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, a video stream switching device with multiplexing function includes a main control unit, the main control unit is provided with a main control board, the main control board includes a CPU processor and a clock module, the clock module is electrically connected to the CPU processor, the video stream switching device further includes a power filter circuit acting on the clock module, the power filter circuit includes an inductor L1Capacitor C1Capacitor C2Capacitor C3Said inductance L1Through a parallel capacitor C1Capacitor C2Capacitor C3Then connected with VCC pin of clock module, capacitor C1Capacitor C2Capacitor C3And the other pin after parallel connection is connected with the GND pin of the clock module and is grounded in common.
Wherein the capacitance C1The capacitor is a tantalum capacitor or a high-frequency electrolytic capacitor, and the capacity is 4.7-47 muF. The capacitor C2And a capacitor C3The capacitor is a ceramic capacitor, and has a capacitance of 0.01-0.1 μ F. The inductance L1Are magnetic beads.
As shown in fig. 2, it can be seen from the curve that the present invention adopts the parallel connection of three capacitors, which can achieve low impedance in a relatively wide bandwidth, and the characteristic impedance of the three-capacitor filter circuit in a relatively wide frequency range can be kept at a low level, thereby achieving the purpose of reducing the power supply ripple, and isolating the reverse pollution of the clock circuit during the operation of transient current to the main control board power supply due to the magnetic beads in the power supply circuit.
Finally, it should be noted that: the above embodiments are only used for illustrating the present invention and do not limit the technical solution described in the present invention; thus, while the present invention has been described in detail with reference to the various embodiments thereof, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted; all such modifications and variations are intended to be included herein within the scope of this disclosure and the present invention and within the scope and spirit of the following claims.
Claims (5)
1. The utility model provides a video stream switching equipment of band reuse function, includes the main control unit, the main control unit is equipped with the main control board, the main control board includes CPU treater, clock module, the clock module with CPU treater electric connection, its characterized in that: the power supply filter circuit acts on the clock module and comprises an inductor L1Capacitor C1Capacitor C2Capacitor C3Said inductance L1Through a parallel capacitor C1Capacitor C2Capacitor C3Then connected with VCC pin of clock module, capacitor C1Capacitor C2Capacitor C3And the other pin after parallel connection is connected with the GND pin of the clock module and is grounded in common.
2. The video stream switching apparatus with multiplexing function according to claim 1, characterized in that: the capacitor C1The capacity is 4.7 muF for tantalum capacitor or high frequency electrolytic capacitor.
3. The video stream switching apparatus with multiplexing function according to claim 1, characterized in that: the capacitor C2The capacitance was 0.1. mu.F for a ceramic capacitor.
4. The video stream switching apparatus with multiplexing function according to claim 1, characterized in that: the capacitor C3The capacitance was 0.1. mu.F for a ceramic capacitor.
5. The video stream switching apparatus with multiplexing function according to claim 1, characterized in that: the inductance L1Are magnetic beads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693623.6U CN210536776U (en) | 2019-10-11 | 2019-10-11 | Video stream switching equipment with multiplexing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693623.6U CN210536776U (en) | 2019-10-11 | 2019-10-11 | Video stream switching equipment with multiplexing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210536776U true CN210536776U (en) | 2020-05-15 |
Family
ID=70607747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921693623.6U Active CN210536776U (en) | 2019-10-11 | 2019-10-11 | Video stream switching equipment with multiplexing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210536776U (en) |
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2019
- 2019-10-11 CN CN201921693623.6U patent/CN210536776U/en active Active
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