Wave Technology List of News Articles

This time, I would like to talk a little about current measurement in the switching evaluation of power semiconductors (including power devices and power modules).

Many customers wish to obtain technical standards conformity certification (Giteki) and construction design certification to use imported Wi-Fi products domestically. However, since radio laws differ from country to country, it is important to note that adjustments to transmission power may be necessary to comply with Japan's radio law. Among these, we will introduce products that require special attention, specifically those compatible with IEEE802.11ax (Wi-Fi 6).

This time, I will discuss the points to consider when designing high-frequency circuits using surface-mounted discrete devices, using low noise amplifier (LNA) design as an example.

This time, I would like to introduce serpentine wiring. Here, I am considering it from the perspective of digital signal transmission in the time domain. With today's even higher clocks, it becomes necessary to consider phase and frequency characteristics, which may present a different view. [Contents] ■ What is serpentine wiring? ■ Why use serpentine wiring? ■ Are there differences in the pattern shape of the serpentine? *For more details, please refer to the PDF document or feel free to contact us.

One of the most representative causes of semiconductor product failures is the degradation of semiconductor devices due to ESD and surges. This time, I would like to introduce measures against ESD and surges for semiconductor products.

This time, I will talk about creating device models for simulation (device modeling). [Contents] ■ What is device modeling? ■ Device modeling of high-frequency power amplifiers ■ Measurements to determine parameters

One of the significant challenges in electronic components and circuit board design is deformation caused by heat. This time, I will discuss thermal warping that occurs due to temperature changes in multilayer structures with different materials in each layer.

Many people may have experienced issues such as unstable operation or missing communication data with digital control boards, albeit rarely. This "rarely" is quite troublesome, as it is usually difficult to reproduce the malfunction. Furthermore, capturing that malfunction, analyzing the cause, and implementing the correct countermeasures requires a certain level of experience. These sporadic issues may be related to the waveform quality of signals that use edges, such as clocks. In this article, I will briefly introduce the malfunctions caused by edge disturbances.

In addition to the design and prototyping of general boards equipped with general-purpose ICs and passive components, WTI also conducts the design and prototyping of evaluation boards using bare semiconductor chips for universities and research institutions, which is not widely known. This time, we would like to introduce this content. [Contents] ■ About the Role *For more details, please refer to the PDF document or feel free to contact us.

The receiver section of the radio is designed to receive signals properly even when influenced by other radios used in the world, and standards have been established for this purpose, requiring designs that comply with these standards. This time, I will briefly discuss the wireless standards for the receiver section! 【Contents】 ■ Minimum reception sensitivity ■ Adjacent channel selectivity ■ Receiver intermodulation ■ Spurious response ■ Harmonic emission * For more details, please refer to the PDF document or feel free to contact us.

I will introduce DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory). To understand what DDR SDRAM is used for, it is easiest to imagine a computer. One of the specifications that people are concerned about in a computer is the memory, and the memory used is DDR SDRAM. 【Contents】 ■ The role of DDR SDRAM ■ The differences between DDR and SDR standards *For more details, please refer to the PDF document or feel free to contact us.

In EOL measures (investigating and replacing discontinued electronic components), it is essential to thoroughly understand the characteristics of each electronic component in order to select parts that are suitable for their applications. This time, as an example, we will focus on "crystals," which are essential for generating clocks in digital circuits, and provide a detailed explanation. 【Contents】 ■ Types and performance of crystals ■ Flow of EOL measures *For more details, please refer to the PDF document or feel free to contact us.