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As the last flagship phone of the OPPO R series, the R17 Pro went on sale around mid-October 2018, with a starting price of 4,299 yuan. About 8 months later, the price of the phone saw a big drop. ...[Details]
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Function of
the circuit
This circuit is a 50~150MHZ high frequency voltage
controlled
oscillator, which can be used with PLL circuit in high frequency circuits such as comm...[Details]
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To promote high-quality development in my country's electronic information engineering science and technology field, assist the scientific development of digital infrastructure and drive the growth o...[Details]
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On March 19, at the Liangjiang Green Low-carbon Digital Energy Development Forum, Infistar, Chaowei Power Supply, Qingneng Interconnection, Diantou Rongda and other companies signed contracts with Lia...[Details]
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With the rapid development of the communications industry, various corresponding advanced communications equipment and ancillary equipment are constantly produced, and the quality requirements for ...[Details]
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Abstract: With the widespread application of high-power switching devices, power quality problems are becoming increasingly serious. This paper compares passive and active filtering technologies ...[Details]
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Being able to enjoy "low" electricity prices during "peak" hours has become a reality in Hanchuan. On October 14, the first user-side energy storage power station in Hubei Province was put into use...[Details]
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It is a 51 single-chip microcomputer, which uses a timer/counter to generate a 2-second timing. Every time 2 seconds is up, the indicator light will flash. The flashing frequency of the indicator lig...[Details]
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With the development of wireless communication chip technology, more and more portable or battery-powered wireless transmission devices have entered people's daily lives. For example, remote keyless ...[Details]
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In the first half of 2020, due to the impact of the COVID-19 epidemic, delays and reductions in orders in the semiconductor industry chain were common; major semiconductor projects in various places ...[Details]
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MAX8844/MAX8844Z/MAX8844Y are intelligent independent constant current, constant voltage (CCCV) dual-input linear chargers with temperature regulation, designed for single-cell lithium-ion (Li+) ba...[Details]
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Compared with traditional aviation power supply vehicles, the aviation ground static variable frequency power supply (hereinafter referred to as static variable power supply) using new power electroni...[Details]
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1. The alarm light between a certain current phase jack is on and there is an alarm sound: the current of this phase is open circuit or the load exceeds the actual output range. Check the wiring and ...[Details]
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For general frequency converters with inverter function, the rectifier part is a single-phase bridge. When the given frequency of the frequency converter drops faster than the speed of the motor dr...[Details]
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On November 5, during the third China International Import Expo, the "1+6+5" series of policy systems to support high-quality development of Langfang Airport Economic Zone (Free Trade Zone) were rele...[Details]