Electronic Components Elecfans

  South Korea announces 2.9 trillion yuan strategic plan to build the world's largest semiconductor industry supply chain. According to Yonhap News Agency, the South Korean government held the " K-Semiconductor Strategy Report Conference " at Samsung Electronics' Pyeongtaek Plant on the 13th, and announced a strategic plan aimed at achieving the goal of a comprehensive semiconductor powerhouse. Specifically, the South Korean government will work with related companies to build the world’s largest semiconductor industry supply chain in China by 2030-the " K-Semiconductor Industrial Belt ", and establish a collection of semiconductor production, raw materials, components, equipment and cutting-edge equipment. High-efficiency industrial clusters integrating, design, etc. As the core content of this strategic plan, the industrial supply chain is vertically connected with Banqiao, Qixing, Hwaseong, Pyeongtaek, Onyang and other cities from the north to the west, a...

Operational amplifiers are abbreviated as operational amplifiers. Because they were used in analog computers in the early days to realize mathematical operations, they were named "operational amplifiers." It is mainly used in analog circuits, such as amplifiers, comparators, and analog operation units, which are devices often used by electronic engineers. An operational amplifier is a circuit unit with a very high amplification factor. In actual circuits, a certain functional module is usually combined with a feedback network. It is an amplifier with a special coupling circuit and feedback. The output signal can be the result of mathematical operations such as addition, subtraction, differentiation, and integration of the input signal. An op-amp is a circuit unit named from the point of view of function, which can be realized by a discrete device or in a semiconductor chip. With the development of semiconductor technology, most operational amplifiers exist in the form of a si...

 Analog-to-digital converters (ADC) and digital-to-analog converters (DAC) have existed since the beginning of the digital era. Since the late 1970s and early 1980s, Texas Instruments (TI) took the lead in launching single-chip digital signal processors (DSP), which are needed by engineers to design systems and can easily surpass the effectiveness of analog components. Early data converters had relatively slow speeds and used parallel interfaces to connect DSPs or processors. With the advancement of process technology, the speed and dynamic range (number of bits) of data converters have also improved, so a faster and wider bus is required. In today's modern data converters, the conversion rate of Gigasample is much higher than 12 bits per second. When converted into a bus transmission rate, it exceeds 1.5 billion bytes per second. Therefore, when engineers use printed circuit boards to connect DSP, processor, or field-programmable gate array (FPGA), they will encounter challenges. ...

With the continuous changes in the audio market demand, the audio amplifier design structure has made great progress. When selecting the best audio amplifier IC for a specific application, it is important to have a full understanding of the types of audio amplifiers available and their characteristics. The audio amplifier increases the amplitude of a small signal to a useful level while retaining the details of the small signal, which is called linearity. The better the linearity of the amplifier, the more true the output signal can represent the input signal. As the audio market's requirements for amplifier performance continue to change, audio amplifier circuit structures have made great progress. Therefore, the designer must understand the available audio amplifiers and their characteristics. This is the only way to ensure that the best audio amplifier is selected. In this article, we introduce the most important features of the various audio amplifiers available today: Class A,...

Reed relay , also called reed switch and reed switch, is composed of a pair of elastic reeds made of magnetic materials. The reeds are sealed in a glass tube filled with inert gas. The reeds overlap and there is a gap between them. The working principle of the reed relay When there is no magnetic field, the two reeds in the glass tube filled with inert gas are separated, otherwise, under the action of the magnetic field lines, the two reeds in the glass tube are magnetized to attract and contact each other, so that the two pins are connected to the circuit. When the external magnetic force is removed, the two reeds in the glass tube are separated again, and the connected circuit is disconnected. The characteristics of the reed relay High reliability; high safety; high adaptability; long life; compact structure; small size; superior electrical performance; high-speed operation; wide application. The solid-state relay has a non-contact switch with an isolation function. There is no mecha...

Spread spectrum communication has the advantages of anti-interference, anti-multipath, and low probability of interception. Since the 1970s, the theory and methods of spread spectrum communication have been greatly developed. Direct Sequence Spread Spectrum (Direct Spread Spectrum), as a common method of spread spectrum communication, has been successfully applied to military and civilian communications and has become one of the core technologies of the third-generation mobile communication system, fully demonstrating its significant advantages and strong vitality. Spread spectrum communication comes at the expense of increasing the bandwidth of information transmission. However, the existing frequency band resources are very limited. In order to increase the rate of information transmission within bandwidth per unit, the idea of ​​using direct sequence spread spectrum CDMA is proposed. At the sending end, one serial data information is converted into N parallel data information throug...

Software Radio, a systematic structure to realize wireless communication launched in recent years, is a significant breakthrough in the field of wireless communication in the wake of analog to digital communication, fixed to mobile communication. The basic principle of it is that the received analog signal is digitalized as soon as possible, and various functions of the radio are realized by software to the most extent. Software Radio is an open structure to realize all types of wireless communication systems through a general hardware platform and then through software loading. For Software Radio, the digitalized hardware platform is the basis, the programmable and reusable software is the core, and realizing multi-band,  multi-system, and universal reception is the goal. Figure 1 is the block diagram to realize Software Radio. Figure 1 shows the four-carrier communication system. The traditional simulation structure completes the conversion from RF(Radio Frequency) to IF(Intermed...