Tag：Voltage
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Time：2021-10-26
Back to directory After understanding the main non ideal parameters of the operational amplifier above, it should not be difficult to read the data specification of the operational amplifier. Next, we take the common lm321 integrated operational amplifier as an example to see how to interpret the data specification of the operational amplifier. 1. Overall […]
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Time：2021-10-8
BMS function list In personal habits, BMS functions are divided into three parts Basic functions of BMS: V / I / T sampling, protection function (overvoltage, overcurrent, overtemperature, insulation resistance), relay drive, status sampling, relay adhesion detection, can communication; Core functions of BMS: cell balance, SOP (power), SOE (energy), SOC (state of charge), SOH (Health); […]
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Time：2021-9-26
From: http://liudongdong1.github.io/ Millimeter wave (mmWave) is a special class of radar technology that uses shortwavelength electromagnetic waves. Radar systems transmit electromagnetic wave signals that objects in their path then reflect. By capturing the reflected signal, a radar system can determine the range, velocity and angle of the objects. operating at 76–81 GHz (with a corresponding […]
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Time：2021-9-11
Two days ago, a friend asked me how to use a new IC chip. I took this opportunity to introduce a debugging method often used in my daily work to my friends, hoping to be helpful to you. The preparation is hasty, and there are inevitable technical errors in the text. You are welcome to […]
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Time：2021-6-10
The year of 2019 is a year of rapid development for mobile phone manufacturers, with 40W, 44w, 50W, 65W and higher power; 2020 is a year worth looking forward to for all mobile phone manufacturers to charge fast. At 100W and 120W, all laboratories are accelerating their power to “break 100”. The progress of manufacturers […]
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Time：2021-6-6
1. Preview flower screen, split screen and card screen When you open the intelligent object recognition app, the output of the underlying sensor is 1632×1224 (200W) by default, which will lead to problems such as multi screen and split screen, However, when the full-size 3264×2448 (800W) output is selected, there will be no such problem. […]
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Time：2021-3-31
The digital potentiometer is mainly used to establish the voltage to voltage ratio circuit, which is not suitable for series connection of pure variable resistor and external resistor 1. It can carry small current, generally in 1mA ~ 3mA 2. Its internal resistance is connected through MOS tube, so it is greatly affected by voltage, […]
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Time：2021-3-1
The difference between MRAM and traditional random access memory is that the information carrier of MRAM is magnetic tunnel junction (MTJ), and the latter is charge. Each magnetic tunnel junction contains a fixed layer and a free layer. The magnetization direction of the fixed layer is fixed, while the magnetization direction of the free layer […]
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Time：2021-1-8
1、 Common semiconductor devices 1.1 intrinsic semiconductor Pure semiconductor, semiconductor with crystal structure Conducting depends on free electrons, valence electrons are not conducting 1.2 carriers Particles carrying conductive action 1.3 intrinsic excitation Definition: valence electrons break away from covalent bonds and produce free electrons and holes When the electric field is applied, the holes will […]
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Time：2020-12-11
At present, the charging management IC on the market is designed according to the charging characteristics of rechargeable batteries. According to different charging media, rechargeable batteries can be divided into Ni MH batteries, Li ion batteries, etc. Because lithium battery has no memory effect, it is used in all kinds of handheld devices and portable […]
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Time：2020-11-24
Back to the catalog 1. Basic working principle The main structure of class A and B power amplifiers (class AB) is similar to class B power amplifiers, but it can eliminate the crossover distortion of class B power amplifiers. The corresponding cost is to increase a little static power consumption, so its efficiency is slightly […]
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Time：2020-11-12
Back to the catalog Operational amplifier(operational amplifier)Operational amplifier(OP AMP) is an integrated amplifier, which is characterized by a very large voltage gain (usually more than tens of thousands), high input impedance and low output impedance. The reason why the word “operation” should be added before its name is that the device was […]
