The power source symbol, are you still stupid?
Common power supply symbol attached!
In the circuit design, there will always be a variety of power symbols, often make people confused, sorted out 27 more commonly used power symbols to share with you.
1.VBB: B can be considered as the base B of the triode, which generally refers to the positive terminal of the power supply.
2.VCC: C can be considered as a Collector or Circuit circuit of the triode, which generally refers to the positive terminal of the power supply.
3.VDD: D can be considered as the Drain or Device device of the MOS tube, which generally refers to the positive terminal of the power supply.
4.VEE: E can be considered as the Emitter of a triode, which generally refers to the negative electrode of the power supply.
5.VSS: S can be considered as the Source of the MOS tube, which generally refers to the negative power supply.
In this command, V - Voltage is displayed
6.AVCC: (A-Analog), analog VCC, the general simulator will have.
7.AVDD: (A-Analog), analog VDD, the general simulator will have.
8.DVCC: (D-Digital), digital VCC, generally in digital circuits.
9.DVDD: (D-Digital), digital VDD, generally in digital circuits.
Note: If the circuit or device does not have analog digital points, it is to use VCC, VDD.
10.AGND: Analog GND, corresponding to the negative terminal of AVCC or AVDD.
11.DGND: Digital GND, which corresponds to the negative terminal of DVCC or DVDD.
12.PGND: (p-power) Power GND, for example, DC-DC, the power ground is differentiated from the signal.
Note: The above three power supply symbols are all GND in essence, mainly for the needs of PCB wiring, there are some single-point grounding or multi-point grounding processing, in order to avoid interference, they are differentiated.
13.VPP: also known as VPK, voltage peak peak value, for sine signals, is the peak voltage minus the trough voltage, the maximum minus the minimum value.
14.Vrms: (rms - root mean squre, with root meaning), Vrms generally refers to the effective value of AC signal.
15.VBAT: BAT (short for BATTERY), generally refers to the battery voltage.
16.VSYS: SYS (SYSTEM - system), generally refers to the system power supply of platform solutions (such as MTK).
17.VCORE: (CORE - core), generally refers to the nuclear power pressure of cpus, Gpus and other chips.
18.VREF: REF (reference - reference voltage), such as the reference voltage inside the ADC.
19.PVDD: (p-power), Power VDD.
20.CVDD: (CORE - core), nuclear power supply VDD.
21.IOVDD: IO is GPIO, which refers to the VDD that supplies power to GPIO. The pull-up power for I2C communication will be used in CAMERA.
22.DOVDD: Used in the CAMERA, the CAMERA is supplied externally, and it is generally an analog power supply.
23.AFVDD: (Auto Focus VDD - auto focus VDD power supply), which will be used in the CAMERA to power the motor.
24.VDDQ: used in DDR, there is a DQ signal in DDR, which can be understood as power supply for these data signals.
25.VPP: used in DDR4, DD3 is not inside, called the activation voltage, the opening voltage of the word bit line.
26.VTT: General VTT=1/2VDDQ, which is also used in DDR to provide power for some control signals.
27.VCCQ: Generally used in NAND FLASH, such as EMMC, UFS and other memory commonly used in mobile phones, generally to power IO.