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nmos    
n. N通路的金属氧化半导体

N通路的金属氧化半导体


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  • In an NMOS, does current flow from source to drain or vice-versa?
    The 'source' means the source of the majority charge carriers of the device If it is NMOS it would be the source of electrons If it is PMOS it would be the source of holes The 'drain' means the terminal through which the majority charge carriers of the device leave the device If it is NMOS the drain will be draining the electrons out of the
  • cmos - NMOS: what exactly forms the inversion layer - Electrical . . .
    The source and drain diffusions (for an nmos) are n diffusions in a p-type substrate Their junction with the substrate needs to be reverse biased If it was forward bias, current would flow from drain source to substrate and the transistor wouldn't work If they are reverse biased that can't happen (only a very small reverse current flows)
  • nMOS passing 1s poorly and pMOS passing 0s poorly
    "nMOS transistors pass 0's well but pass 1's poorly" and "pMOS pass 1's well but 0's poorly" What exactly do these statements mean and why is it so? An enhancement-mode MOSFET conducts best when its gate voltage is significantly different from the channel voltage The exact value is known as the "threshold voltage"
  • mosfet - Transconductance of a nmos transistor - Electrical Engineering . . .
    High Voltage NMOS layout design in UMC130nm process using Cadence Virtuoso 1
  • Why choose a PMOS over an NMOS or vice versa?
    To do this NMOS-on-high-side party trick requires making a higher-than-high gate drive voltage, so that the NMOS will be fully turned 'on' This higher-than-high trick is used in switching power supplies for example: they use a 'bootstrap' circuit to make that higher gate voltage for the NMOS on high side
  • ltspice - How to do NMOS modeling analysis in Spice - Electrical . . .
    NMOS current flowing equally in both directions in SPICE simulation 1 Incorporating ALD1106 SPICE model
  • transistors - NMOS: why VGS instead of VG? - Electrical Engineering . . .
    I am having lots of trouble trying to understand how the mosfet is triggered The text I read assumes the source of the NMOS connect to ground, while a positive voltage is applied at the gate Because the source is grounded, VGS (voltage between gate and the source) = VG (voltage of the gate)
  • Channel doping change to control the threshold voltage in an NMOS
    An NMOS transistor works by having an electric field, from the gate, through the gate oxide, towards the silicon substrate, attract electrons to the substrate to form a conductive layer called an 'electron inversion channel'
  • How does logic 1 get passed through an NMOS pass transistor?
    In your circuit, the NMOS with VG=3 and VS=3 (and bulk generally =0), will act as a source follower (source and drain are interchangeable) -- the output will follow a threshold voltage below the input So say VTH = 0 7, then the output will be pulled up to about 3-0 7 = 2 3 V
  • Circuit with LTspice default NMOS model does not work as expected
    The circuit is a voltage source in series with a resistor in series with the NMOS A pulse voltage source is connected to the gate terminal to turn on off the NMOS After I switched the drain and source terminals, the circuit worked as it was supposed to The problem seems to be that LTSpice incorrectly labeled the terminals of the NMOS





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