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RF power amplifiers. Schemes, articles, descriptions

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RF power amplifiers

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Miniature power supply, 220/5-12 volts 100 milliamps



Section Power supplies. The proposed block is intended for power supply from a network of small-sized radio-electronic devices (pocket radios, voice recorders, watches, etc.). The output voltage can be selected in the range from 5 to 12 V. One of the advantages of the unit is its small dimensions: all its parts are placed in the mains plug housing. The schematic diagram of the block is shown in Figure 5.37 ... >>

High-voltage converters on a thyristor-transistor generator



Section Voltage converters, rectifiers, inverters. In everyday life and in production, high-voltage converters are often used, for example, in ionizers, welding oscillators for non-contact ignition of the arc, as well as in automotive ignition systems, etc. We offer high-voltage converters built on a thyristor-transistor generator, the load of which is automobile ignition coils of the B116 or B117 type. The scheme is shown in Fig. 1 ... >>

Replacing the IGBT module in the welding machine



Section Welding equipment. Unfortunately, like any other electronic devices, welding sources sometimes fail. The most common reason is the burning of high-power inverter output transistors. This is exactly what happened with the ETALON ZX7-180R inverter, which I bought already faulty, but very cheap. An IGBT module was pierced in it (Fig. 1). This, according to the seller, is a typical malfunction of such devices, and the price of a new module reaches half the cost of the entire inverter, and there is no guarantee that the newly installed module will not be broken after some time. ... >>

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Articles on RF Power Amplifiers

Articles on RF power amplifiers; RF power amplifier circuits; descriptions of RF power amplifiers: 53 articles

 


 

Latest news of science and technology, new electronics:

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

High Energy Density Capacitor 17.05.2024

Energy plays a key role in many aspects of modern life, and the ever-increasing demand for efficient and fast-charging power sources is driving innovation. Researchers at the McKelvey School of Engineering at Washington University in St. Louis have taken a significant step forward with a high-energy-density capacitor that promises to revolutionize the world of energy. A team of scientists from the McKelvey School of Engineering at Washington University in St. Louis presented the results of their latest research on heterogeneous thin-film structures for capacitors. Researchers, working with ferroelectrics, inadvertently created a capacitor with an amazing energy density that is 19 times higher than that of conventional elements. This breakthrough opens up new prospects for the development of fast-charging batteries, which are so necessary in the modern world. Capacitors play a key role in various devices, providing stable ... >>

Causes of conflicts between brothers and sisters 16.05.2024

Family relationships are often complex and multi-layered, and conflicts between siblings are no exception. Research in this area can help us understand what factors underlie these conflicts and why they occur so frequently. Let's look at some of the findings from psychologists at Arizona State University. American psychologists from Arizona State University conducted a study aimed at identifying the causes of conflicts between brothers and sisters. They found that different forms of violence, whether physical or verbal, did not depend on the gender of the siblings. This means that both girls and boys can exhibit aggressive behavior towards their loved ones. Other studies have shown that conflict between siblings often persists into adulthood, even as contact decreases. This indicates that people often follow established patterns of behavior formed in childhood. It was also found that, despite ... >>

Random news from the Archive

A new way to obtain alternative fuel 16.07.2022

Scientists from the US Department of Energy's Berkeley National Laboratory, together with colleagues from the Danish Technical University, have developed a new method for obtaining alternative fuels.

This substance is similar to biological diesel, which is created as a result of the metabolism of soil bacteria. While chewing food, bacteria synthesize molecules that reproduce a large amount of energy.

In chemistry, anything that requires energy to produce releases energy when it breaks down. This makes it possible to release a large amount of energy, as when burning oil. True, like hot fuels, molecules have explosive properties.

If you learn how to enrich the fuel at low temperatures, then rockets and airplanes will be able to fly on it.

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