የፒ.ሲ.ቢ. ስብሰባ ቻይና አምራች ዲዛይን ፒሲቢ አናሎግ ወረዳ እንዴት ነው?

የተለያዩ የአናሎግ የታተመ የወረዳ ሰሌዳ ዓይነቶችን ለመረዳት በጣም ቀላል መመሪያ

የርዕስ ማውጫ
-1 ለፒ.ቢ.ቢ. ስብሰባ ቻይና መግቢያ
2-አካል ምደባ
3-የፒ.ሲ.ቢ. አምፕሊፕ ዓይነቶች
4-ፒ.ቢ. ስብሰባ ቻይና ከፍተኛ
5-
6-ዲጂታል ፒ.ሲ.ቢን በመቅረጽ ፒሲቢ ስብሰባ ቻይና ምን ችግሮች ያጋጥሟታል?
7-መመሪያዎች ለከፍተኛ ድግግሞሽ PCB ወረዳ

 

Introduction to Pcb Assembly China

ዲስትሪከት ክርስቲያን የቻይና ኩባንያዎች  are manufacturing analog circuit signals for more than 60 % of electric devices.  A PCB is a crucial part of any electronic gadget for tiny devices or complex computers. Its complex interconnect components include resistors, diodes, capacitors, etc., enabling the devices to work in series. generally, a printed circuit board works as a soul of any electrical component. it is very importantly, so the PCB assembly process should be error-free and requires attention to common mistakes in assembly making process. Here are some factors to note:

Pcb Assembly China Basis rules for designing

There are three basic thoughts for designing rules.

1. Component placement
2. Signal conductor
3. Supply and ground line conductors

Component placement

In analog circuit design, component placement has significant role.

Following are the pcb component placement guideline:

• Front panel components should have proper alignment.
• Internal components must have a board edge placement
• Metal case components should be far from internal components.
• Heat sensitive and heat-producing components should not have side by side placement. Therefore proper planning must be there for the arrangement of both. The heat-producing components should be arranged all over the board evenly to avoid overheating and the heat-sensitive components must be placed with appropriate space from them.
• Similarly, mounting screws, it is necessary to have proper space between nuts and washer and there must not be any conductive track beneath this.

Signal conductor instructions for Pcb Assembly China

Reference level, feedback, input, output, etc. are some important tasks for pcb assembly china. Moreover, the signal conductor has to be short as possible for all analog circuit design. The signal conductor for the following circuits should have an adequate formation.

Circuits

1. High gain DC Amplifier
2. Differential Amplifier
3. Low-level signal Amplifier
4. High-frequency Amplifier
5. Multi-stage Amplifier

Brief description of Pcb Amplifier Types

1. High gain DC Amplifier

Generally, Pcb assembly china uses this device to amplify low-level signals. You can easily form a thermocouple junction between lead and copper. This thermocouple junction forms different voltages which cause noise signals. A pcb manufacturer should place the input stage in a separate edge to keep the temperature stable.

2. Differential Amplifier

The Differential Amplifier is important as it moves between tow signals and dismisses the common voltage. If the differential amplifier or PCB ዲዛይን is not proper and the level of the signal is low then the common voltage creates a small difference signal. The geometrical symmetry while designing the amplifier must be correct otherwise the unbalanced impedance can disturb the performance of the circuit. Similarly, the leakage resistance creates unbalance voltage. Moreover, the guard conductor connects the signal conductor to the guard of the equipment. This method helps in handling differential signals at a low level. Furthermore, the glass epoxy base for differential amplifier helps in minimizing the leakage problem.

Pcb Assembly china High-frequency Amplifier

Inappropriate PCB layout of high-frequency layout results lessens the bandwidth of the amplifier. The closeness of the ground and signal conductor results in high capacitance, which acts as a low filter pass filter, which reduces the bandwidth of the amplifier. Moreover, the closeness of output and input conductors result in vibrations. According to leading pcb assembly china manufacturer, the frequency of more than 10 MHz will cause vibration. But the amplifier will not oscillate when the desired frequency is given. The capacitive coupling between signal lines cause such problems. Thus the capacitive coupling should be less while making PCB ዲዛይን .

Supply and Ground Conductors

The power supply must have enough thickness to keep the resistance and inductance low. But the conductance is directly proportional to thickness or width. If analog and digital circuits are on the same PCB then they must have their own separate ground conductors. For reference voltage circuits, the supply lines must attach to input and the ground line must attach to the stable ground reference.  Subsequently, stable ground reference is sensitive to the changes in ground potential. Simultaneously, the ground conductors have resistance, inductance, the doubtful current which causes voltage drops when passes from the ground impedance.

 What are the basic rules for designing analog PCB?

Pcb assembly china states general rules for designing analog PCB circuit areas;

• በኤሌክትሪክ እና በኤሌክትሮማግኔቲክ ጣልቃ ገብነት በኩል የቮልቴጅ መጣልን ለመቆጣጠር የምልክት መንገዶቹን አጭር ያድርጓቸው ፡፡
• በተመሳሳይ በተመሳሳይ ሰሌዳ ላይ ያሉ አናሎግ እና ዲጂታል መሬቶች በተናጠል መቀመጥ አለባቸው ፡፡
• የምልክት መሬቱን ከምድር መሬት ጋር ያገናኙ።
• አቅም ያላቸው ጋሻዎችን በማገናኘት ለድምፅ ምንጭ የመመለሻ መንገድ ይስጡ ፡፡
• የመግነጢሳዊ ጋሻዎች ቁሳቁስ በከፍተኛ ሁኔታ መተላለፍ አለበት
• በተጨማሪም በወረዳዎቹ ላይ ጥቅም ላይ የዋለው ብረት ትክክለኛ ዝግጅት ስላለው መንቀሳቀስ የለበትም
• የጋራ ሞድ ምልክቶቹ የተለዩ እንዳይሆኑ ሲስተሙ የተረጋጋ መሆን አለበት
• የስርዓቱ ባንድዊድዝ በምልክት ባንድዊድዝ መስፈርት መሰረት መሆን አለበት።
• አሁን ባለው መተላለፊያ መሠረት የሉፎቹን መንገድ ያርጉ ፡፡
• ከሁሉም በላይ በሁለት ፒ.ሲ.ቢ. መካከል ያለውን የጩኸት ውድቅነት ለመቆጣጠር ወይም ለማሻሻል ፣ ጥንድ ኬብል ይጠቀሙ እና በአንድ ላይ ያጣምሯቸው ፡፡

What problems pcb assembly china face in designing digital PCB?

The demand for PCB in digital circuits is very much because of its performance but the knowledge of electronic transmission lines is also important.

If the design of digital PCB is not proper it may cause following problems for pcb assembly china manufacturer like

• Convert one pulse into two or more (double pulsing) which is known as Reflection.
• Produce delay signals
• Interrupt the signals known as Cross-talk.
• Can produce ground and supply signal noise
• Cause of electromagnetic interference.

What are the guidelines for pcb assembly china manufacturer for high-frequency PCB circuit design?

Following are the instructions for high-frequency PCB circuit

• For ground conductors, pcb assembly china manufacturer uses a large ground surface
• ሰፊው የኃይል አቅርቦት ማስተላለፊያዎች ጥቅም ላይ ይውላሉ
• በተጨማሪም የመሬት እና የኃይል አቅርቦት መስመሮች ትይዩ እና እርስ በእርሳቸው ቅርብ መሆን አለባቸው
• የመሬቱ እና የኃይል አቅርቦቱ በመካከላቸው የማዞሪያ መያዣ (capacitor) ሊኖረው ይገባል
• የኤሌክትሮክ ኪሳራ በቀጥታ ከርዝመት ጋር የሚመጣጠን ስለሆነ ለፈጣን ምት አስተላላፊው ርዝመት አነስተኛ መሆን አለበት ፡፡
• በተጨማሪም ፣ በኤሌክትሪክ ኃይል መቆጣጠሪያ ውስጥ የሞተር ኤሌክትሪክ መጥፋት በጣም አስፈላጊ ነው ፣ ሆኖም ትክክለኛ የከፍተኛ ድግግሞሽ ልኬት ያለው ፒሲቢ ጥቅም ላይ መዋል አለበት
• የተሽከርካሪውን አቀማመጥ ዲዛይን ማድረግ እንደ መያዣው እና እንደ ኢንደክተሩ ነው ፡፡ የበለጠ ጎጂ ንጥረ ነገር ጥቅም ላይ መዋል የለበትም
• መስመሮቹ በትንሽነት መቆየት አለባቸው ወይም በእድገቱ ጊዜ ውስጥ መጨመር እስከ 1 ሴኮንድ / ሴ.ሜ መሆን አለበት
• ጥገኛ ተህዋሲያን (capacitance capacitance) እንኳን በመሬት ላይ መስመሩን ያዘጋጁ የከፋ ውጤት አለው ፡፡