Class A push-pull amplifier. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Tube Power Amplifiers
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Author: A. Shikhatov; Publication: bluesmobile.com/shikhman
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Latest news of science and technology, new electronics:
Machine for thinning flowers in gardens
02.05.2024
In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers.
... >>
Advanced Infrared Microscope
02.05.2024
Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>
Air trap for insects
01.05.2024
Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>
| Random news from the Archive liquid light switch
16.08.2016
An international team of scientists has created a miniature electro-optical switch that changes the spin or angular momentum of a liquid form of light when subjected to the electric field of a semiconductor device. This is a step towards even greater miniaturization of electronics.
Scientists at the University of Cambridge, led by Professor Jeremy Baumberg of the Nanophotonic Center, along with scientists from Mexico and Greece, have created a switch that uses a new state of matter called a Bose-Einstein polariton condensate. The device mixes electrical and optical signals with minimal energy consumption.
A polariton Bose-Einstein condensate is formed by trapping light between mirrors a few millionths of a meter apart, allowing it to react with thin semiconductor wafers. A half-light-half-matter mixture is created there, called a polariton.
By concentrating many polaritons in one place, you can make them condense in the form of a light-material fluid, rotating either clockwise or counterclockwise. By applying an electric field to this system, the scientists were able to control the spin of the condensate and switch between up and down states. The polariton fluid emits light, with a clockwise or counterclockwise spin, which can be sent through an optical fiber, thus converting electrical signals into optical ones.
In this way, it is possible to transmit a signal at a very high speed with minimal energy consumption and to develop more miniature devices, the authors of the work believe. They have created a prototype that works at cryogenic temperatures and are looking for other materials that can work at room temperature. Then the technology can be commercialized. Another key factor for commercialization is mass production and scalability. To do this, scientists are looking for ways to integrate the prototype with the existing technological base.
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