PCB Manufacturer & PCB Assembly | Advanced Circuits

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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Designing Signal Integrity Analysis for High Speed Circuits

Posted on November 12, 2018 by G

With the advancement of technology, the signal blocking time of high-speed integrated circuits has reached several hundred ps, and the clock frequency can reach several hundred MHz. Such a high edge rate causes a large number of interconnect lines on the printed circuit board to be produced in low-speed circuits. The transmission line effect causes distortion of the signal, which seriously affects the correct transmission of the signal. If the board design is not considered, the circuit with the correct logic function will not work properly when debugging. In order to solve this problem, signal integrity analysis must be carried out when designing high-speed circuits. The system is thoroughly simulated by virtual template, and the influence of circuit layout and routing on signal integrity is accurately analyzed, and the circuit design is guided. In this way, many problems that can be found in debugging can be solved during the design, which greatly improves the design success rate and shortens the design cycle.

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Signal Integrity Analysis of MCM Place and Route Design

Posted on November 09, 2018 by G

As the packing density increases and the operating frequency increases, the signal integrity problem in MCM circuit design cannot be ignored. Taking the detector circuit as an example, this paper firstly uses APD software to realize the layout and layout design of the circuit, and then combines the signal integrity analysis to adjust the circuit layout and wiring structure repeatedly. The final Spectra Quest software simulation results show that the improved circuit layout and routing Meet signal integrity requirements while maintaining high simulation accuracy.

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Software Implementation of MCM High Speed Circuit Layout Design

Posted on November 09, 2018 by G

With the development of integrated circuit process technology, the operation speed of multi-chip components is getting higher and higher, and the processing of high-speed signals has become the key to the success of MCM circuit design. When the rising or falling edge of the clock signal is small, the transmission line effect is caused, that is, signal integrity problems occur.

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Signal Integrity Analysis of High Speed DSP Systems

Posted on November 07, 2018 by G

Combine an actual DSP high-speed image data acquisition system to illustrate the generation of signal integrity problems and specific solutions.

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Signal integrity issues for high speed DSP data acquisition

Posted on November 07, 2018 by G

At present, the increasingly fine semiconductor process makes the transistor size smaller and smaller, so the signal transition of the device is faster and faster, the fast slope transient of the high-speed digital system and the extremely high operating frequency, and the large circuit density. This has led to signal integrity issues and electromagnetic compatibility issues in the field of high-speed digital circuit system design. Destroying signal integrity directly leads to signal distortion, timing errors, and incorrect data, address, and control signals, which can cause misoperations and even system crashes. Therefore, signal integrity issues have increasingly attracted the attention of high-speed digital circuit designers.

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What are the ways to increase the impedance?

Posted on November 05, 2018 by G

When the impedances don't match, what are the ways to match it? First, consider using a transformer for impedance conversion, as in the example in the TV above. Second, consider using series/parallel capacitors. Or inductive methods, which are often used when debugging RF circuits. Third, consider the use of series/parallel resistors. Some drivers have lower impedance and can be connected in series with a suitable resistor to match the transmission line, such as high-speed signal lines, sometimes A series of resistors of several tens of ohms will be connected in series. The input impedance of some receivers is relatively high. The method of parallel resistors can be used to match the transmission line. For example, 485 bus receivers often have a matching resistor of 120 ohms in parallel at the data line terminal.

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Understanding of input impedance and output impedance

Posted on November 05, 2018 by G

The so-called input impedance mainly considers the power consumed by the circuit itself (can be understood as meaningless loss). For a voltage-driven circuit, the larger the impedance, the smaller the current, the smaller the P=I*I*R, and the smaller the current. In terms of the driving circuit, the smaller the impedance, the smaller the P=I*I*R, and the smaller the power consumption, so that for the latter circuit, more power can be output.

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Some basic concepts of signal integrity in high speed circuit design

Posted on November 05, 2018 by G

1. Signal Integrity: refers to the quality of the signal in the circuit system. If the signal can be transmitted from the source to the receiver without distortion in the required time, we call the signal complete.

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How to quickly solve the signal integrity problem of high speed systems

Posted on November 05, 2018 by G

As data rates continue to increase, signal integrity issues have become the most critical factor for design engineers to consider. This exponential increase in data rate can be seen in applications such as handheld mobile devices and consumer display products to high-bandwidth routers/switches. Jitter (noise) is the primary reason for reducing the level of signal integrity in a design. In addition to signal integrity enhancement techniques using layout, impedance matching, and more expensive materials, designers can simply add jitter cancellers such as equalizers to the design to solve jitter problems. This way designers don't have to focus on signal integrity issues, but focus on the core design of the system.

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Singnal Integrity terminology (12-22)

Posted on October 31, 2018 by G

12. What is the pin-to-pin delay (delay)?

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Singnal Integrity terminology (1-11)

Posted on October 31, 2018 by G

1. What is Signal Integrity?

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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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Serial RapidIO Switching Design Practice Tips for Handling Signal Integrity

Posted on October 30, 2018 by G

Signal integrity (SI) issues are becoming a growing concern for digital hardware designers. Due to the increased data rate bandwidth in wireless base stations, wireless network controllers, wired network infrastructure, and military avionics systems, board design has become increasingly complex.

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Handling Signal Integrity of High-Speed Board Designs with Serial RapidIO Switching

Posted on October 30, 2018 by G

This article focuses on signal integrity challenges involving high-speed interface design (the main features of RapidIO switching support these high-speed interface designs), and the ability to optimize RapidIO switching is designed to achieve high signal integrity in high-speed designs.

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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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Method of avoiding transmission line effects

Posted on October 24, 2018 by G

The ways to control the effects of transmission line effects from the following aspects.

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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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How to use the IBIS model for signal integrity analysis

Designing Signal Integrity Analysis for High Speed Circuits

Signal Integrity Analysis of MCM Place and Route Design

Software Implementation of MCM High Speed Circuit Layout Design

Signal Integrity Analysis of High Speed DSP Systems

Signal integrity issues for high speed DSP data acquisition

What are the ways to increase the impedance?

Understanding of input impedance and output impedance

Some basic concepts of signal integrity in high speed circuit design

How to quickly solve the signal integrity problem of high speed systems

Singnal Integrity terminology (12-22)

Singnal Integrity terminology (1-11)

Two major problems in high speed PCB design

Serial RapidIO Switching Design Practice Tips for Handling Signal Integrity

Handling Signal Integrity of High-Speed Board Designs with Serial RapidIO Switching

Have to know the PCB design skills

Ground interference analysis and suppression method in PCB layout

Method of avoiding transmission line effects

High-speed PCB controllability and electromagnetic compatibility design

Talking about impedance control of PCB

Categories

Recommended Article:

BLOG

How to use the IBIS model for signal integrity analysis

Designing Signal Integrity Analysis for High Speed ​​Circuits

Signal Integrity Analysis of MCM Place and Route Design

Software Implementation of MCM High Speed ​​Circuit Layout Design

Signal Integrity Analysis of High Speed ​​DSP Systems

Signal integrity issues for high speed DSP data acquisition

What are the ways to increase the impedance?

Understanding of input impedance and output impedance

Some basic concepts of signal integrity in high speed circuit design

How to quickly solve the signal integrity problem of high speed systems

Singnal Integrity terminology (12-22)

Singnal Integrity terminology (1-11)

Two major problems in high speed PCB design

Serial RapidIO Switching Design Practice Tips for Handling Signal Integrity

Handling Signal Integrity of High-Speed ​​Board Designs with Serial RapidIO Switching

Have to know the PCB design skills

Ground interference analysis and suppression method in PCB layout

Method of avoiding transmission line effects

High-speed PCB controllability and electromagnetic compatibility design

Talking about impedance control of PCB

Categories

Recommended Article:

Designing Signal Integrity Analysis for High Speed Circuits

Software Implementation of MCM High Speed Circuit Layout Design

Signal Integrity Analysis of High Speed DSP Systems

Handling Signal Integrity of High-Speed Board Designs with Serial RapidIO Switching