In high-speed design , the characteristic impedance of controlled impedance boards and lines troubles many Chinese engineers. This article introduces the basic properties, calculation and measurement ...
[i=s]This post was last edited by huixianfxt on 2015-3-29 16:00[/i] [img]file:///G:\qq\1017269368\Image\C2C\QZA_1{0JM45AGLXFW7}U%8Q.png[/img]#include#include
using namespace std; class A1{ public: //i...
[i=s]This post was last edited by ywlzh on 2016-5-5 17:51[/i] A few days ago, I suddenly applied for a personal WeChat public account. Not many people know it, just a few good friends know it. The ori...
[color=#000][backcolor=rgb(242, 242, 242)][font=Arial, Helvetica, sans-serif][size=12px]MEMS microphones combine more than 20 years of ADI MEMS expertise with decades of audio signal processing experi...
Wince system, 2440 chip. When I drag the icons on the Wince desktop with the touch screen, the icons will keep jumping. The values on the touch screen keep changing, and the difference sometimes excee...
I. Introduction
In the field of power conversion, isolated converters (forward, flyback, and double-ended) with low output DC voltage all use MOSFET as the rectifier device. Since these devi...[Details]
0 Introduction
With the development of society, people pay more and more attention to security work. Monitoring products have been used in various fields instead of being used only in importan...[Details]
introduction
The emergence of high-performance, low-power embedded CPUs and high-reliability network operating systems has made it possible to implement applications with large amounts of comp...[Details]
1 Introduction
Water resources are the basic conditions for human survival and the lifeline of economic development. The reality shows that due to the global shortage of water resources and th...[Details]
The serial interface real-time clock chip DS1302 launched by Dallas Company in the United States can trickle charge the backup battery of the clock chip. Due to the main features of the chip such a...[Details]
The DisplayPort interface standard is approved by the Video Electronics Standards Association (VESA) to provide an open, scalable standard for the entire industry. The development of DisplayPort ca...[Details]
At present, with the diversification of portable products and the almost harsh requirements for audio and video parts, the power consumption requirements of the whole machine have been raised to a ...[Details]
The most important components of new energy electric vehicles are power batteries, electric motors and energy conversion control systems. The power battery must achieve high performance such as fas...[Details]
It should be understood as follows: DC-DC means direct current to direct current (conversion of different DC power values). Anything that meets this definition can be called a DC-DC converter, incl...[Details]
Current
measurement:
Magnetic balance Hall current
sensor
is used
. The sensor can measure AC from DC to 100kHz.
In automatic measurement and control systems, it is often nec...[Details]
0 Introduction
With the development of virtual instrument technology, new measurement and control methods that use "virtual instruments" to replace traditional instruments are replacing trad...[Details]
In the development direction of the automotive industry, electric vehicles (EV) and hybrid electric vehicles (HEV) are becoming an obvious trend. From a technical point of view, hybrid power is mor...[Details]
1 Introduction
With the rapid development of my country's economy, the country has introduced a series of policies such as preferential policies, subsidy policies, and old-for-new policies, wh...[Details]
1 Overview
As a driving power source, the new battery has a range of more than 200 km within the acceptable weight range of the mass market, which provides an important way for power batteries...[Details]
High specific energy lithium/thionyl chloride (Li/SOCl2) batteries are widely used in multi-functional intelligent meters (such as smart meters, water meters, etc.) as real-time clocks and memory b...[Details]
PCB Design
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