Abstract: In traditional voltage-type control, there is only one loop with poor dynamic performance. When the input voltage is disturbed, the duty cycle changes slowly through the voltage loop feedback. Therefore, in the case where the transient error of the output voltage is
Read moreRecently, US chip equipment manufacturer Applied Materials (AppliedMaterials) announced that it will acquire Japanese chip equipment manufacturer Tokyo Electron. The deal will all be conducted in the form of stocks, and the combined new company will have a market capitalization of $29 billion. Acc
Read moreRecently, Jiangxi Province officially issued the "Photovoltaic Power Generation Plan in Jiangxi Province." The "Planning" proposes that by the end of 2015, it will initially establish an institutional mechanism to support the rapid and sound development of photovoltaic
Read more[ Reporter/Yang Zizhao ] On May 24th, the "15th China Association for Science and Technology Annual Meeting" was held in Guiyang, Guizhou. Haotian Optoelectronics "Innovation and Focus on Sapphire Technology" exchange meeting was held as the "15th China Association for Scie
Read moreRecently, Vanke announced that its latest R&D application based on the limited-time buy-in mode will be launched on the 28th of this month. This "artifact" has already "pulled" hundreds of brands and will mainly The network buying application for special discount pr
Read moreTA7609P midfield oscillation and field synchronization principle 场 The field oscillator in TA7609P is a self-excited multivibrator composed of a positive feedback op amp. As shown in Figure 8 - 36, Q41 and Q42 form a differential amplifier, and form a positive feedback circuit with Q45, Q46Ã
Read moreWith the establishment of China's socialist market economy, the rapid development of electronic banking, the increasing number of ATMs and the popularity of ATMs, ATM machines play an active role in facilitating people's lives and invigorating financial markets. This article refers to th
Read moreAt present, in order to cope with the fierce market competition, home appliance enterprises have turned to characteristic management, and children's home appliances have also become popular. The related products are endless: children's refrigerators, children's washing machine
Read moreAt the Guangzhou International Lighting Fair held in June this year, the products exhibited by Hongbao Electric are basically core products of the company, such as LED street lamps, LED garden lamps, LED tunnel lamps and LED downlights. The debut of the small Dolphin series of small power
Read moreOn the evening of May 16, Lenovo released the high-end flagship smartphone K900. Lenovo's senior vice president Liu Jun set a "warrant": it will surpass Samsung and Apple within two years. Liu Jun called K900 a Lenovo breakthrough product, comparable to Apple
Read moreYan Yuan, chairman of the board of directors, said on the 19th that the company's first quarter revenue performance was poor, the combined revenue was only 930 million yuan (NT), but after entering the traditional peak season in the second quarter, it is estimated that the quarter revenue is ex
Read moreLow-voltage electrical appliances are widely used in industries and transportation. With the changes in the power industry and distribution industry and the high-speed expansion of the power industry, the low-voltage electrical appliance industry can be described as having many opportuniti
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