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0 引言
直接数字合成(Direct Digital Synthesis—DDS)是近年来新的电子技术。单片集成的DDS产品是一种可代替锁相环的快速频率合成器件。DDS是产生高精度、快速变换频率、输出波形失真小的优先选用技术。DDS以稳定度高的参考时钟为参考源,通过精密的相位累加器和数字信号处理,通过高速D/A变换器产生所需的数字波形(通常是正弦波形),这个数字波经过一个模拟滤波器后,得到最终...[Details]
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Gold rush with big models on board The biggest technological trend of the past year has to be large models. In early 2023, the wave caused by ChatGPT quickly evolved into a wave of AI technology ...[Details]
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Recently, the Shenzhen Securities Regulatory Bureau disclosed the registration information of China International Capital Corporation Limited (hereinafter referred to as CICC) regarding the initial p...[Details]
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Commonly asked questions about moisture analyzers 1. The problem of full sealing of the system: The connection of the Karl Fischer reagent liquid path must be tightened, from the reagent bottle to th...[Details]
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In the 2008 Zhejiang Province College Students
Electronic
Design Competition, there was a topic called "Music Player Design", which required playing music with 12 keyboards. One of the te...[Details]
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New energy vehicle connectors are one of the major categories of connectors. With the development of new energy vehicles in the country in recent years, they have gradually separated from tradition...[Details]
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The USB 3.1 connector will be unveiled. The Universal Serial Bus Developers Forum (USB-IF) announced that it has begun developing the USB Type C connector based on USB 3.1 and USB 2.0 technologies. ...[Details]
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Working principle of electronic transformer
The electronic transformer introduced below has an input of AC220V and an output of AC12V, and its power can reach 50W. It is mainly a transformer circui...[Details]
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According to feedback from netizens on IT Home, Redmi K40 has now pushed the MIUI 12.5.14 stable version update. In addition to optimizing and fixing issues in the lock screen, status bar, ...[Details]
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If the Tektronix oscilloscope cannot be powered on normally, it is not necessarily a fault. You can solve it by following the following methods: Please check whether the oscilloscope power cord is...[Details]
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Analysis of AVR's IO port characteristics:
Analyze the IO pin Pxn. Only when DDRxn is 1, the controllable unidirectional switch will work, and the value of PORTxn can be sent to Pxn through the c...[Details]
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Booth 4.1B0-02 of Shanghai International Import Expo from November 5 to 10, 2023 In October 2023, in Clacton-on-Sea, UK. Pickering Electronics, a leader in miniaturization and high-performance reed...[Details]
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The clock source of the STM8 microcontroller can be selected as internal or external, and can be easily switched during system operation. The following experimental program first switches the main ...[Details]
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From November 10th to 12th, the "2023 China Automobile Supply Chain Conference and the Second China New Energy Intelligent Connected Vehicle Ecological Conference" co-sponsored by the China Associati...[Details]
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First, let's take a look at the working process of USB.
When a USB device is connected to the host, the host begins to enumerate the USB device and sends a command to the USB device to obtain ...[Details]