Under normal circumstances, the electronic products we use are made of pcb plus a variety of capacitors, resistors and other electronic components designed according to the circuit diagram
in dynamic power consumption, in addition to the capacitor power consumption when flipping, there is also the short-circuit power consumption caused by the simultaneous on-off of PMOS and NMOS when the gate * signal is flipping.
From here, we also know that when NMOS works, there is current flowing from the power supply (VDD) to the ground (that is, from D to S). When the power supply voltage is constant, This current follows the voltage across the gate .
as well as the corresponding single chip microcomputer and supporting compilation software. Key board is generally selected matrix keyboard, has a wide range of practicability.
To be honest, CMOS is more micro electronic devices, micro electronic devices are really difficult... Here are a few things you might want to know about doing digital design (I'll add more later if necessary).
This is the structure and workflow of NMOS. (PMOS work in the opposite way: turn on by controlling the low level voltage applied to the gate, and turn off the channel by controlling the high level voltage applied to the gate.)
the output current is large, and the adjustable voltage regulator tube circuit, so as to obtain satisfactory and stable output voltage.
On the one hand, by controlling the high level voltage applied in the grid *, there is a channel between the source and drain, and the electrons flow from the source to the drain through the channel, and the direction of the current is from the drain to t
Some do not notice this phenomenon, directly adjust the sense resistance or working frequency to reach the required current, which may seriously affect the service life of LED.
The PCB layout and wiring can be adjusted to prevent ESD Static electricity from the human body, the environment and even inside electronic equipment can cause various damage to the precision semiconductor chip.
It is characterized by surface mounting of components and reflow welding technology. It has become a new generation of assembly technology for electronic products manufacturing.
In the semiconductor electronics industry, if you want to become a qualified electronic, in addition to understanding the basic knowledge, but also know the key points of circuit protection device selection.
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