Take the Bluetooth speaker as an example to integrate the basic knowledge of PCB designare in casu practico, et explica munus et experientiam practicam et artes programmatis PCB designandi per processum operationis. Hoc profecto cognoscet relatam scientiam PCB wiring explicando per visum ac principia de consilio wiring.

Key points of this study:

Overview ac principiis 1. Wiring

2.PCB wiring postulata

3. Impedimentum imperium PCB wiring

Cognita difficultas in hoc tempore:

Overview ac principiis 1. Wiring

2. Impedimentum imperium PCB wiring

Overview ac principiis 1. Wiring

In traditional PCB design, the wiring on the board only serves as the carrier of signal connectivity, and the PCB design engineer does not need to consider the wiring distribution parameters.

With the rapid development of the electronic industry, data swallowing from a few megabytes per unit time, tens of megabytes to the rate of 10Gbit/s has brought about the rapid development of high-speed theory, PCB wiring is no longer a simple interconnection carrier, but from the transmission line theory to analyze the impact of various distribution parameters

Eodem tempore, multiplicitas et densitas PCB crescens simul, ex communi foramine consilio microform foraminis designandi ad multistage caecus foraminis designati, adhuc resistentia sepulta sunt, continens reconditum, consilium altae densitatis PCB wiring ad simul difficultates ingentes afferunt, praeterea PCB designatorium fabrum egent altiori intellectu processus parametri PCB productionis et processus processus.

Cum progressionis summae celeritatis et densitatis PCB, PCB designationis fabrum magis ac magis in consilio ferramentario magis fiunt, dum respondentes PCB designandi provocationes magis ac magis fiunt, et fabrum consilium magis magisque scientia puncta cognoscendi opus est.

Duo, PCB wiring type

Typi wiring in tabula PCB maxime includunt funem insignem, vim copiam et filum humi. Among them signal line is the most common wiring, the type is more. Still have mono line according to wiring form, difference line.

Secundum corporis structuram wiring, etiam in linea uitta et linea microstrip dividi potest.

Iii. Basic knowledge of PCB wiring

General PCB wiring has the following basic requirements:

(1) QFP, SOP and other packaged rectangular pads should be led out from the PIN center (generally using pave shape).

(2) Panno (1) QFP, SOP, et alii fasciculi pads rectanguli e filo, a centro PIN (vulgo figura utentes. Spatium a linea ad marginem laminae non minus quam 20MIL.

Nota: in figura supra, rubra est forma tabulae exterioris, et viridis est custodia totius tabulae areae wiring (Routkeepin plusquam viginti milia milium ad formam incisam).

Note: This board edge also includes window opening, milling groove, ladder, milling thin area by milling cutter processing graphics edge.

(3) Sub metallis machinis, alia foramina retis non permittuntur, et superficies wiring (conchas metallicae communes crystallum oscillatorem, altilium, etc.) includunt.

(4) Wiring errores DRC non habebunt, eiusdem nominis retis DRC errores, excepto consilio compatibili, exceptis DRC erroribus per se implicantibus.

(5) Nulla retis inexplicabilis post PCB designatio est, et PCB retis congruere debet cum schematis ambitu.

He is not allowed to attend the Dangline.

(7) If it is clear that non-functional pads do not need to be retained, they must be removed from the light drawing file.

(8) Commendatur primo dimidium spatii ne a magnis piscibus 2MM

(9) It is recommended to use inner wiring for signal cables

(10) It is recommended that the corresponding power plane or ground plane of the high-speed signal area be kept intact as far as possible

(11) It is recommended that the wiring be evenly distributed. Copper should be laid in large areas without wiring, but the impedance control should not be affected

(12) It is recommended that all wiring should be chamfered, and the chamfering Angle is 45°

(13) Monetur ne ansas lineas signo sui formantes cum longitudine super 200ML in stratis adjacentibus

(14) It is recommended that the wiring direction of adjacent layers be orthogonal structure

Nota: wiring strata adjacentium vitanda est in eadem directione ad reducendum sermonem inter stratis crucis. Si necesse est, praesertim cum in altum usa sit signum, planum tabulatum considerari debet ut singulas tabulatum filum recludet, et terra signum quodque signum lineae separet.

4. Impedimentum imperium PCB wiring

Description: Line width in PCB processing is divided into two parts, the width of the upper surface and the width of the lower surface.

Schematic diagram of impedance calculation of single-ended signal microstrip line:

Schematic diagram of impedance calculation of differential signal microstrip line:

Schematic diagram of impedance calculation of strip line of single-ended signal:

Diagramma schematicum de impedimento lineae bandae calculi differentialis signo;

Schematica schematis de impedimento calculi signum microstrip lineae simplicis finitae (cum filo humi plano):

Schematic diagram of impedance calculation of differential signal microstrip line (with coplanar ground wire) :

Haec est deductio perceptio et principia ALLEgrorum pro programmatis PCB designationis.