CN209201391U

CN209201391U - A kind of PCB circuit board

Info

Publication number: CN209201391U
Application number: CN201821207488.5U
Authority: CN
Inventors: 葛瑞昌
Original assignee: Shanghai Road Qi Industry Development Co Ltd
Current assignee: Shanghai Road Qi Industry Development Co Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2019-08-02
Anticipated expiration: 2028-07-27

Abstract

The utility model discloses a kind of PCB circuit board, including bottom plate and flexible circuit FPC plate set on the bottom plate, the flexible circuit FPC plate includes signal wire and power supply signal, and the signal wire and power supply signal are separately connected signal and power supply on bottom plate.The PCB circuit board of the utility model, PCB layer face is reduced by increasing a FPC on the signal wire or power supply line of printed circuit board, so that some key signal lines is kept a relatively complete reference planes (i.e. not across plane), reduce signal return flow path, and then reduces radiation to guarantee signal normal transmission.

Description

A kind of PCB circuit board

Technical field

The utility model relates to field of circuit boards, in particular to a kind of PCB circuit board.

Background technique

Guarantee the complete extremely important of signal in PCB design, needs complete reference layer.The number of plies is more, signal reference Layer is more complete, but also increases many costs, and number of plies when PCB design is reduced now with FPC, neither destroys complete flat Face, solves signal problem and most of company is worried to reduce cost.

When circuit is in running order, signal return flow path can be generated.Signal return flow path, i.e. return current.For high-speed digital signal in transmission, the flow direction of signal is along PCB transmission line from driver to load, then by loading edge It lands or power supply passes through shortest path Returning driver end.This return signal on ground or power supply just claims signal to flow back road Diameter.Any signal on wiring board will return flow path.Can all there are many signal wires, such as data line on wiring board, address wire, Clock line, high number signal wire etc., and these signal wires require reference planes such as power plane or ground level as letter Number return flow path, complete reference planes can reduce the crosstalk between PCB upward wiring, reduce electromagnetic interference, signal transmission with The loop area that signal reflux is constituted is smaller, and signal radiation is also smaller.And the signal when reference planes of signal are cut Return flow path is elongated, and loop area becomes larger, and radiation energy is also bigger, to cause the risk of EMC only.

Prior art deficiency must use plus the method for level, and level is all even numbers in PCB design, and such as 4 layers, 6 layers, 8 Layer, it one plus level be exactly two layers, bring cost is bigger.Layer situation PCB trace is not added and destroys completion reference planes, Influence signal.Therefore, the prior art need to be improved.

Utility model content

To overcome the problems of prior art, a kind of PCB circuit board is now provided, reduces signal return flow path, in turn Reduce radiation to guarantee signal normal transmission.

A kind of PCB circuit board of the utility model, including bottom plate and flexible circuit FPC plate set on the bottom plate, it is described soft Property circuit FPC plate includes signal wire and power supply signal, and the signal wire and power supply signal are separately connected signal and electricity on bottom plate Source.

Further improve is that the signal wire equidistantly arranges.

Further improve is that the power supply on the bottom plate is located at the opposite end of bottom plate.

For the prior art, the PCB circuit board of the utility model passes through the signal wire or electricity in printed circuit board Increase a FPC on the line of source to reduce PCB layer face, some key signal lines is made to keep a relatively complete reference planes (i.e. Not across plane), reduce signal return flow path, and then reduce radiation to guarantee signal normal transmission.

Detailed description of the invention

Fig. 1 is a kind of overall structure diagram of pcb board of the utility model；

Fig. 2 is pcb board signal lead figure when not having FPC connection signal line in a kind of pcb board of the utility model.

Specific embodiment

It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer Each embodiment of type is explained in detail.However, it will be understood by those skilled in the art that in the utility model In each embodiment, in order to make the reader understand this application better, many technical details are proposed.But even if without these Technical detail and various changes and modifications based on the following respective embodiments also may be implemented each claim of the application and wanted Seek the technical solution of protection.

The embodiments of the present invention is related to a kind of pcb board, as shown in Figure 1, including bottom plate 1 and on bottom plate 1 Flexible circuit FPC plate 111 (hereinafter referred to as FPC plate 111), flexible circuit FPC plate 111 include signal wire 2 and power supply signal 3, letter Number line 2 and power supply signal 3 are separately connected signal and power supply on bottom plate 1, and the power supply on bottom plate 1 is located at the opposite of bottom plate 1 End.

In addition, signal wire 2 equidistantly arranges, connection and cabling convenient for signal.

In specifically used, as shown in Figures 1 and 2, FPC plate 111, which is mainly connected to, needs the power plane across signal wire 2 On, FPC plate 111 is connected to signal and this both ends of power supply, if when without 111 connection signal line 2 of FPC plate, routing path need through 222 position of signal lead is crossed, the plane of these signal wires 2 is destroyed, reference planes are imperfect at this time, and signal return flow path becomes larger, And after increasing FPC plate 111, on the process pcb board of FPC plate 111, signal and power supply are connected by pad above surface layer, will not incite somebody to action in this way The ground level of signal reference is cut, thus signal wire 2 has a relatively complete reference planes, reduces between pcb board upward wiring Crosstalk, reduce electromagnetic interference.Level can be thus reduced, does not influence plank performance and its function, moreover it is possible to reduce 2 layers or more Plate.

When signal wire 2 and power supply line are routed through without level, it is necessary to which, using the method for adding level, PCB is set Level is all even numbers in meter, such as 4 layers, 6 layers, 8 layers, it one plus level be exactly two layers, bring cost is bigger.Now Some key signal lines 2 can be made to keep a relatively complete reference planes by increasing a FPC plate 111 on power supply line Still complete plane will not be destroyed following one layer of (i.e. not across plane), i.e. signal lead 222, reduce signal return flow path, And then reduce radiation to guarantee signal normal transmission.The method for accomplishing reduction level can reduce by 2 faces layer by layer using a FPC, It effectively solves level to reduce, reduce costs, while can guarantee the complete of signal again.

A kind of pcb board of the utility model is reduced number of plies when pcb board design using FPC plate 111, neither destroyed Whole plane solves signal problem and reduces costs.

It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific implementation of the utility model Example, and in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit of the utility model And range.

Claims

1. a kind of PCB circuit board, it is characterised in that: including bottom plate and flexible circuit FPC plate set on the bottom plate, the flexible electrical Road FPC plate includes signal wire and power supply signal, and the signal wire and power supply signal are separately connected signal and power supply on bottom plate.

2. a kind of PCB circuit board as described in claim 1, it is characterised in that: the signal wire equidistantly arranges.

3. a kind of PCB circuit board as described in claim 1, it is characterised in that: the power supply on the bottom plate is located at bottom plate Opposite end.