【Abstract】 In order to design a small-sized, simple-structured, low-cost ultra-wideband high-low frequency nested antenna (high frequency: 1 427-2 690 MHz, low frequency 690-960 MHz), this paper first...
The answer uses current series negative feedback. The answer is compiled from the postgraduate entrance examination materials.
I have a few questions
1. The load is a 50Ω output resistor. Shouldn't vo...
[i=s]This post was last edited by littleshrimp on 2022-5-25 17:03[/i]This time we are going to dismantle the display screens of two Audi cars. One is a 5.8-inch display screen produced by Alpine that ...
The "Download and Comment on the Materials" activity in April has been successfully concluded. Netizens commented on the materials very actively, and everyone's enthusiasm can be felt across the scree...
(1) Resistance measurement range: 10~1KΩ. (2) Inductance measurement range: 100H~10mH. (3) The measured resistance and inductance values can be directly displayed on the DC digital voltmeter. (4) It h...
summary
A fully differential amplifier (FDA) has differential inputs and differential outputs, and its output common mode is independently controlled by the direct current (DC) inp...[Details]
As LED lighting applications have increasing requirements for component output, traditional LED packaging not only limits the advancement of component specifications, but also has disadvantages i...[Details]
According to the Science and Technology Innovation Board Daily, the reorganization of Huawei's intelligent automotive components business and the adjustment of its investment decision-making manageme...[Details]
1. Rectification part Maintenance of circuit boards: if you need to do some dust removal, apply three-proof paint to the board if necessary (for some environments with high humidity and high dust, it...[Details]
On July 9, the International Telecommunication Union (ITU) Wireless Communications Sector (ITU-R) held a meeting and announced that NB-IoT met all indicator requirements and was officially accepted a...[Details]
0 Introduction With the advent of the new era, cars have developed rapidly as an important means of transportation. At the same time, the number of car thefts has also increased. However, most o...[Details]
On the afternoon of February 19, third-party disassembly organization iFixit released a disassembly video of the Samsung Galaxy Z Flip folding screen mobile phone, which showed the special struct...[Details]
OnePlus entered the smart TV market in the second half of 2019, and even after more than a year, the brand's TVs are still only sold in the Indian market. Currently, the company sells a total of five...[Details]
1. What is non-destructive testing?
Answer: Nondestructive testing is a testing method that checks the surface and internal quality of the inspected parts without damaging the workpiece or the ...[Details]
The design of the printed circuit board is very important for the anti-interference of the single-chip microcomputer system. The three principles of controlling the noise source as much as possible...[Details]
According to the Times of India, people familiar with the matter revealed that Xiaomi and OPPO had to import smartphones for sale in India as local assembly plants found it difficult to resume normal...[Details]
PID control is a very old and widely used control algorithm, ranging from the temperature control of a kettle to the flight attitude and speed control of a drone. In motor control, the PID algorith...[Details]
As a Chinese open source real-time operating system, RTT has been enriched by some domestic professionals and now supports most MCUs and X86. Of course, the popular STM32 is no exception. The biggest...[Details]
In order to achieve synchronization between threads, a mutex lock is usually added before executing the critical code segment, and unlocked after the critical code segment is executed. In order to ...[Details]
Power technology
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