Class D amplifier with 240W output power and 0,1% distortion. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

Class D amplifier with 240W output power and 0,1% distortion

14.03.2006

Texas Instruments and the Technical University of Denmark have developed a Class-D (Class-D) amplifier with 240W output power and less than I/O distortion.

A TI spokesman said that "this is the best known product of its kind, and the output power level is unprecedented for monolithic output stages." To achieve low THD, an open-loop feedback was used, which is preferable to closed-loop, which cannot easily be added to an all-digital signal path.

The amplifier is built on n-channel horizontal (lateral) DMOS transistors, which are used both in the output stages and in the pre-amp stages. Distortions initially affect the timing and electrical characteristics of the prestages. Reduced distortion is achieved by optimizing the size of the transistors of the preliminary and output stages.

The amplifier is manufactured using a 0,4 µm/1,8 µm high voltage BiCMOS process with two aluminum plating layers and one copper layer.

Each half-bridge uses three pins for VDD ground and output, each of which is connected to the crystal by a stranded wire. Two half-bridges are placed on the chip, each of which provides an output current of up to +18 A and a power of up to 244 W at a load of 4 ohms in bridge mode.

<< Back: CMOS image sensor 2 megapixels 6 mm thick 15.03.2006

>> Forward: MEMS microphones from Akustica: a new word in sound processing 13.03.2006

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

DVD or FMD ROM 08.01.2003

Will FMD ROM outperform DVD in terms of parameters?

The first parameter is the size/capacity ratio. Here "fluorescent multilayer disk" is beyond competition. The developers claim that even now the first prototypes can accommodate up to 12 GB with a disk size of 5 cm in diameter, that is, on a standard 140-inch drive. This is ten layers. And in the nearest plans of the C3D company there is a desire to at least tenfold the number of layers.

At the same time, the possibility of creating removable storage media with a capacity of tens of terabytes becomes quite real. The capacity that today can only be obtained using huge disk arrays, sometimes occupying entire cabinets and even rooms, will be provided by a compact disk that easily fits in your pocket!

As for the access speed, there is still very little data. The developers promise that this parameter will be much higher than that of DVD. Otherwise, with existing speeds, when working with terabyte arrays of information, even simple operations, such as rereading a disk, can take several hours. New gigantic volumes also require appropriate access speeds.

As for the ratio of capacity / cost of the media, then here FMD ROM has no equal. After all, it is practically a piece of plastic, or rather, a polymer matrix with a photochromic substance, but at a cost, it is just a plastic disk. And no expense to create expensive translucent layers, as in DVD.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews