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What is the role of plug-in power inductors in smart home scenarios?
In recent years, smart home, also known as smart house, has appeared in people's vision. Generally speaking, it is a networked and intelligent home control system integrating automatic control system, computer network system and network communication technology. Smart home system is based on the residential platform and controls all appliances connected to the home network through mobile app. Smart home includes eight subsystems; The purpose of these systems is to bring people a safe, convenient, comfortable, artistic, environment-friendly and energy-saving living environment. Smart home not only needs convenient and intelligent control program in software, but also needs to ensure the normal operation of smart home system in hardware. In this case, various inductors must be used in the circuit to collect data. In addition, there are protection circuit, oscillation circuit, power supply circuit, power amplification circuit and filter circuit; These circuits are without exception, and inductors are one of the indispensable electronic components. So, what is the role of plug-in power inductors in smart home scenarios? Current blocking effect: the self induced electromotive force in the coil always opposes the current change in the coil. It can be mainly divided into high-frequency choke coil and low-frequency choke coil. Tuning and frequency selection: LC tuning circuit can be formed by connecting inductance coil and capacitor in parallel. That is, if the natural oscillation frequency f0 of the circuit is equal to the frequency f of the non AC signal, the inductive reactance and capacitive reactance of the circuit are also equal, so the electromagnetic energy oscillates back and forth between the inductance and capacitance, which is the resonance phenomenon of the LC circuit. During resonance, because the inductive reactance and capacitive reactance of the circuit are equivalent and reverse, the inductive reactance of the total circuit current is the smallest and the current is the largest (referring to the AC signal of f=f0), so the LC resonant circuit has the function of selecting the frequency and can select the AC signal of a certain frequency f.
local 2022-10-12 10:35:17
What device is EEPROM?
EEPROM is a live erasable programmable read-only memory. It is a memory chip with no data loss after power failure. EEPROM can erase existing information and reprogram it on a computer or on a dedicated device. Usually used for Plug and Play. EEPROM (charged erasable programmable read-only memory) is a user-modifiable read-only memory (ROM), which can be erased and reprogrammed (rewritten) by higher than normal voltage. Unlike EPROM chips, EEPROM can be modified without having to be removed from the computer. In an EEPROM, the life of the EEPROM is an important design consideration because the computer can be programmed repeatedly when it is in use. EEPROM is a special form of flash memory that is typically used to erase and reprogram voltage from a personal computer The writing process of EEPROM takes advantage of the tunnel effect that electrons with less energy than the energy barrier can cross the barrier to the other side. Quantum mechanics assumes that electrons fluctuate when the physical size is equal to the free path of the electron, which means that the object is small enough. As far as the P n junction is concerned, when the impurity concentration of P and N reaches a certain level and the space charge is very small, the electrons will migrate due to the tunnel effect guide band. The range in which the energy of an electron is at an allowable level is called a band, the lower band is called a valence band, and the higher band is called a conduction band. When an electron reaches a higher conduction band, it can move freely between atoms, which is the current. Due to the inconvenience of EPROM operation, the BIOS ROM chips on the motherboard are mostly EEPROM (Electrical Erasable Programmable ROM). EEPROM erase does not need to use other devices, it uses electronic signals to modify its contents, and uses Byte as the smallest unit of modification, so it can write without washing out all the data, completely breaking away from the constraints of EPROM Eraser and the programmer.
local 2022-10-12 10:34:06
What are the categories of memory products?
memorizer is an electronic device that uses semiconductors, memorizer media and other technologies to store data. Memory unit is actually a kind of sequential logic integrated circuit. They can be divided into read-only memory (ROM) and random access memory (RAM) according to the type of memory used. They have different functions and therefore different descriptions. Semiconductor devices and magnetic materials are the main storage media for memory. The smallest unit of storage in a memory is a bistable semiconductor circuit or a CMOS transistor or magnetic material that stores a binary code. A storage unit consists of several storage units, and then a storage unit consists of many storage units. There are several different ways to categorize products for storage. According to the function of memory in computer system, it can be divided into main memory, auxiliary memory, cache memory, control memory, etc. In order to resolve the contradiction between the requirement of large capacity, fast speed and low cost for memory, multilevel memory architecture is usually used, even with high-speed buffer memory, main memory and external memory. By storage media, mainly include: (1) Semiconductor memory: A memory consisting of semiconductor devices. The U disk is a semiconductor memory. The Flash chip is integrated in the U disk, and the storage medium is a semiconductor. (2) Magnetic surface memory: a memory made of magnetic material. By storage method, it mainly includes: (1) Random memory: The contents of any storage unit can be accessed randomly, regardless of the access time or the physical location of the storage unit. (3) Sequential memory: can only be accessed in a certain order, the access time is related to the physical location of the storage unit.
local 2022-10-12 10:33:04