PCB Manufacturer & PCB Assembly

PCB Simulation and Design of DDR3 Memory

Posted on November 26, 2018 by G

Today's computer system DDR3 memory technology has been widely used, and the data transmission rate has been repeatedly improved, and has now reached 1866Mbps. Under such high-speed bus conditions, to ensure the reliability of data transmission quality and meet the timing requirements of parallel buses, it poses great challenges to design implementation.

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Through Hole Design of PCB Impedance Controlled

Posted on November 23, 2018 by G

To maintain signal integrity on printed circuit boards, a unique approach to inter-layer interconnects (vias) that allows the trace impedance to be accurately matched should be used.

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The First 12 Reasons for the Designation of DC Trace Impedance

Posted on November 20, 2018 by G

More and more manufacturers are requesting the DC trace impedance on the PCB. The reasons for specifying and controlling the DC trace impedance are given below from the designer's point of view.

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Signal Integrity Analysis Models in Common PCB Board Level

Posted on November 15, 2018 by G

In order to perform circuit simulation, it is necessary to first build a model of the component, that is, for the various components supported by the circuit simulation program, there must be a corresponding mathematical model to describe them in the simulation program, that is, a calculation formula that can be calculated by a computer. To express them.

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SPICE model, Verilog-AMS model and VHDL-AMS model

Posted on November 15, 2018 by G

Common PCB board level signal integrity analysis model

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How to use the IBIS model for signal integrity analysis

Posted on November 12, 2018 by G

Knowing the basic principles of the IBIS model, it is easy to perform signal integrity analysis on the designed circuit. Due to the high precision and transparency of the IBIS model, it was supported by major EDA vendors as soon as it was introduced. Now all kinds of EDA tools have the function of system simulation using IBIS model, and some of them integrate with PCB design tools. In the design process, the simulation of signals can be directly performed online, which is very convenient to use.

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Two major problems in high speed PCB design

Posted on October 30, 2018 by G

1. EMC, EMI. 2. Routing skills for high-speed differential signals

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Have to know the PCB design skills

Posted on October 26, 2018 by G

The advantage of Protel is that it is more popular in the Chinese market. As long as the PCB is Protel, any file can make a board. Southern China is more likely to accept the OrCAD format.

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Ground interference analysis and suppression method in PCB layout

Posted on October 24, 2018 by G

The main cause of electromagnetic interference caused by the ground line is the impedance of the ground line. When the current flows through the ground line, a voltage is generated on the ground line. This is the ground line noise. Driven by this voltage, ground loop current is generated, causing ground loop interference. When two circuits share a ground line, a common impedance coupling is formed. The method for solving the ground loop interference is to cut the ground loop, increase the impedance of the ground loop, and use a balanced circuit. The solution to the common impedance coupling is to reduce the impedance of the common ground portion or to use a parallel single-point grounding to completely eliminate the common impedance.

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High-speed PCB controllability and electromagnetic compatibility design

Posted on October 24, 2018 by G

When the system is operating at 50MHz, transmission line effects and signal integrity issues will occur; when the system clock reaches 120MHz, PCBs based on traditional methods will not work unless high speed circuit design knowledge is used. Therefore, high-speed circuit design technology has become a design tool that electronic system designers must adopt. The controllability of the design process can only be achieved by using the design techniques of high-speed circuit designers.

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Talking about impedance control of PCB

Posted on October 18, 2018 by G

As circuit design becomes more complex and high-speed, how to ensure the integrity of various signals (especially high-speed signals), that is, to ensure signal quality, becomes a problem. At this time, it is necessary to analyze by means of the transmission line theory, and the characteristic impedance matching of the control signal line becomes the key. The non-strict impedance control will cause considerable signal reflection and signal distortion, resulting in design failure. Common signals, such as PCI bus, PCI-E bus, USB, Ethernet, DDR memory, LVDS signals, etc., require impedance control. Impedance control ultimately needs to be realized through PCB design, and higher requirements are also imposed on the PCB board process.

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Analysis of problems in PCB design (26-40)

Posted on October 18, 2018 by G

26. When there are multiple digital/analog function blocks in a PCB board, the conventional practice is to separate the digital/analog grounds. What are the reasons?

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Tag: pcb problems pcb PCB design

Analysis of problems in PCB design (16-25)

Posted on October 18, 2018 by G

Can you introduce some foreign technical books and materials on high-speed PCB design?

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Tag: high-speed digital circuits PCB design

Analysis of problems in PCB design (1-15)

Posted on October 18, 2018 by G

1. How to choose PCB board?

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Module function circuit PCB board design

Posted on October 08, 2018 by G

Each VXI bus device has a set of “configuration registers”. The system main controller reads some of the basic configuration information of the VXI bus device by reading the contents of these registers, such as device type, model, manufacturer, and address space (A16, A24). , A32) and the required storage space.

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Test technology Based on high speed PCB interconnect design

Posted on October 08, 2018 by G

PCB interconnect design techniques include testing, simulation, and various related standards, where testing is the method and means to verify the results of various simulation analyses. Excellent test methods and means are necessary to ensure the analysis of PCB interconnection design. For traditional signal waveform testing, the main focus should be on the length of the probe leads to avoid unnecessary noise introduced by Pigtail. This article focuses on new applications and development of interconnect testing techniques.

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PCB interconnection design skills and methods

Posted on September 26, 2018 by G

The interconnection of the board system includes: chip-to-board, interconnection within the PCB, and three types of interconnections between the PCB and external devices. In the RF design, one of the main problems facing the electromagnetic characteristics engineering design at the interconnection point, this paper introduces the various techniques of the above three types of interconnection design, including the device installation method, wiring isolation and measures to reduce lead inductance.

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RF circuit PCB design - component layout

Posted on September 26, 2018 by G

Since SMT generally uses infrared furnace heat flow welding to achieve component soldering, the layout of the components affects the quality of the solder joints, which in turn affects the yield of the product. For the design of RF circuit PCB, electromagnetic compatibility requires that each circuit module does not generate electromagnetic radiation as much as possible, and has certain anti-electromagnetic interference capability. Therefore, the layout of components directly affects the interference and anti-interference ability of the circuit itself. This is also directly related to the performance of the designed circuit.

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RF circuit PCB design process

Posted on September 26, 2018 by G

With the development of communication technology, handheld wireless RF circuit technology is used more and more widely, such as: wireless pager, mobile phone, wireless PDA, etc., the performance indicators of the RF circuit directly affect the quality of the entire product. One of the biggest features of these handheld products is miniaturization, and miniaturization means that the density of components is large, which makes the mutual interference of components (including SMD, SMC, die, etc.) very prominent.

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Achieve efficient PCB automatic routing design

Posted on September 21, 2018 by G

Although the current EDA tools are very powerful, as PCB size requirements become smaller and the device density becomes higher and higher, PCB design is not difficult.

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Tag: PCB automatic PCB routing PCB layers pcb

PCB Simulation and Design of DDR3 Memory

Through Hole Design of PCB Impedance Controlled

The First 12 Reasons for the Designation of DC Trace Impedance

Signal Integrity Analysis Models in Common PCB Board Level

SPICE model, Verilog-AMS model and VHDL-AMS model

How to use the IBIS model for signal integrity analysis

Two major problems in high speed PCB design

Have to know the PCB design skills

Ground interference analysis and suppression method in PCB layout

High-speed PCB controllability and electromagnetic compatibility design

Talking about impedance control of PCB

Analysis of problems in PCB design (26-40)

Analysis of problems in PCB design (16-25)

Analysis of problems in PCB design (1-15)

Module function circuit PCB board design

Test technology Based on high speed PCB interconnect design

PCB interconnection design skills and methods

RF circuit PCB design - component layout

RF circuit PCB design process

Achieve efficient PCB automatic routing design

Categories

Recommended Article:

BLOG

PCB Simulation and Design of DDR3 Memory

Through Hole Design of PCB Impedance Controlled

The First 12 Reasons for the Designation of DC Trace Impedance

Signal Integrity Analysis Models in Common PCB Board Level

SPICE model, Verilog-AMS model and VHDL-AMS model

How to use the IBIS model for signal integrity analysis

Two major problems in high speed PCB design

Have to know the PCB design skills

Ground interference analysis and suppression method in PCB layout

High-speed PCB controllability and electromagnetic compatibility design

Talking about impedance control of PCB

Analysis of problems in PCB design (26-40)

Analysis of problems in PCB design (16-25)

Analysis of problems in PCB design (1-15)

Module function circuit PCB board design

Test technology Based on high speed PCB interconnect design

PCB interconnection design skills and methods

RF circuit PCB design - component layout

RF circuit PCB design process

Achieve efficient PCB automatic routing design

Categories

Recommended Article: