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{{title|Static CMOS}}
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'''Static [[CMOS]]''' is a circuit component or a [[logic gate|gate]] in which its output is always connected to a either [[VCC|V<sub>cc</sub>]] or [[GND]].
'''Static [[CMOS]]''' is a [[logic gate|logic]] circuit design technique whereby the output is always strongly driven due to it always being connected to either [[VCC]] or [[GND]] (except when switching). This design is in contrast to [[Dynamic CMOS]] which relies on the temporary storage of signal using various load capacitances.
 
  
 
== Overview ==
 
== Overview ==
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* pull-down network (PDN) - a set of [[NMOS]] transistors connected between GND and the output line
 
* pull-down network (PDN) - a set of [[NMOS]] transistors connected between GND and the output line
  
Components designed out pull-up and pull-down networks operate in a mutually exclusive way; in a steady state there is never a direct path between Vcc and GND. Devices that are made up of PUN/PDN are always strongly driven and therefore offers strong immunity from noise. When both the pull-up and pull-down networks are OFF, the result is [[high impedance]]. That state is important for memory elements, tristate bus drives, and various other components such as some multiplexers and buffers. When both the pull-up and pull-down networks are ON, the result is a [[crowbarred level]]. This result is typically an unwanted condition
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Components designed out pull-up and pull-down networks operate in a mutually exclusive way; in a steady state there is never a direct path between V<sub>cc</sub> and GND. Devices that are made up of PUN/PDN are always strongly driven and therefore office strong immunity from noise.
 
 
{| class="wikitable"
 
|-
 
! || PUN OFF || PUN ON
 
|-
 
| PDN OFF || [[high Z]] || 1
 
|-
 
| PDN ON || 0 || [[crowbarred level]]
 
|}
 
 
 
[[Category:CMOS]]
 

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