PCB Technical - Related PCB Technology Blog Posts page 208

2021-08-19

Putting the decoupling capacitor directly in the IC package can effectively control EMI and improve the integrity of the signal. This article starts with the internal packaging of the IC, analyzes the source of EMI and the role of IC packaging in EMI control, and then proposes 11 effective EMI control Design rules,

2021-08-19

At present, electronic equipment is still used in various electronic equipment and systems with printed circuit boards as the main assembly method. Practice has proved that even if the circuit schematic design is correct and the printed circuit board is not properly designed, it will adversely affect the reliability of electronic equipment.

2021-08-18

The interconnection of the circuit board system includes three types of interconnection between the chip to the circuit board, the interconnection within the PCB board, and the PCB and external devices. In the RF design, the electromagnetic characteristics at the interconnection point is one of the main problems faced by the engineering design.

2021-08-18

The printed circuit board (PCB) is the support for circuit components and devices in electronic products. It provides electrical connections between circuit elements and devices. With the rapid development of electronic technology, the density of PCB is getting higher and higher. The quality of PCB design has a great influence on the ability to resist interference.

2021-08-18

With the advent of high-speed DSP (digital signal processor) and peripherals, designers of new products are facing an increasingly serious threat of electromagnetic interference (EMI). In the early days, emission and interference problems were called EMI or RFI (Radio Frequency Interference).

2021-08-18

Unfortunately, these features are harmful and should be avoided as much as possible during the design process. In high-frequency circuits, crosstalk may be the most difficult to understand and predict, but it can be controlled or even eliminated.

2021-08-18

Signal isolation prevents digital or analog signals from passing through the barrier between the sending and receiving terminals when they are sent through a galvanic connection. This allows the difference between the ground or reference level outside the transmitting and receiving terminals to be as high as several thousand volts, and prevents loop currents between different ground potentials that may damage the signal.

2021-08-18

At the chip level, the current SOC (system on chip) requires expertise in logic circuits, analog circuits, and thermodynamic design. To successfully use these ICs, board-level and system-level designers need to understand how to best place components, route traces, and use protective components.

2021-08-18

Due to the dense installation of electronic circuit components. Special requirements such as anti-interference and wiring. The printed boards used in some newer electronic products not only have upper and lower sides for wiring, but also have interlayer copper foil that can be specially processed in the middle of the board.

2021-08-18

When designing high-speed circuit boards, automated design tools sometimes fail to find this unobvious but very important problem. However, as long as some measures are taken in the early steps of the design, this problem can be avoided. This technique is called "defensive design".

2021-08-18

PCB layout ​designers are not usually involved in the planning of the layers used to build the boards they are designing.

2021-08-18

With the continuous improvement of miniaturization, components and wiring technology have also made great developments, such as highly integrated micro ICs packaged in BGA shells, and the reduction of insulation spacing between conductors to 0.5mm. These are just two examples.

2021-08-18

With the development of computer technology, most of the domestic science and engineering colleges have opened single-chip courses. In order to learn this course well, experiments related to the principle and technology of single-chip microcomputers are indispensable. At present, most learning boards use 51-series single-chip microcomputers.

2021-08-17

Many special characteristics of RF circuits are difficult to explain in a few short sentences, nor can they be analyzed using traditional simulation software, such as SPICE. However, there are some EDA software on the market that have complex algorithms such as harmonic balance, shooting method, etc., which can simulate radio frequency circuits quickly and accurately.

2021-08-17

DFM (Design for manufacturability) is design for manufacturing, and it is the core technology of concurrent engineering. Design and manufacturing are the two most important links in the product life cycle. Concurrent engineering is to consider factors such as product manufacturability and assemblability at the beginning of the design.

2021-08-17

Many senior engineers often follow the path of basic and wrong design. This is the high-frequency thinking of electromagnetic compatibility (EMC) design.

2021-08-17

The electromagnetic compatibility (EMC) design of the single-chip microcomputer system mentioned in this article is mainly designed from the two aspects of hardware and software. Next, the electromagnetic compatibility (EMC) design from the PCB board design of the single-chip microcomputer to the software processing is introduced. handle.

2021-08-17

People's lack of exploration in the "soft" and hardware fields of embedded system development is mainly due to the lack of tools for C programmers to use their skills at the programmable hardware level. Indeed, most of the current FPGA design flows mainly come from the field of chip design and require very professional skills.

2021-08-17

With the development of modern wireless communication systems, mobile communication, radar, satellite communication and other communication systems have higher requirements on the switching speed, power capacity, and integration of the transceiver switch. Therefore, the VXI bus technology is studied.

2021-08-17

Signal integrity refers to the quality of the signal in the circuit system. If the signal can be transmitted from the source to the receiving end without distortion within the required time, the signal is said to be complete.