'Static' in Static CMOS logic is used to emphasize:

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The question asks about the meaning of 'Static' in Static CMOS logic. Since the answer options are not provided in the input, I will focus on the single given option to analyze its correctness and the underlying concept.
Option: 'The output is always connected to VDD or GND through a set of ON transistors (no switching unless the inputs change)'.
First, recall that Static CMOS uses complementary p-channel and n-channel transistors to form a pull-up network (to VDD) and a pull-down network (to GND). When the inputs are held steady, the conducting state of these networks is fixed, and the output is driven strongly to a rail without relying on stored charge in capacitive nodes. This aligns with the phrase that the output is always connected to VDD or GND through a set of transistors that are on, and that the output only transitions when the inputs change, not due to dynamic charging/discharging of internal nodes.
Second, the core idea of 'static' in this context is that there is no required switching activity to maintain the output level once a valid input combination has established the rail connection. In other words, the output does not rely on a dynamic storage element to hold its value; it is statically determined by the current input and the fixed networks.
Third, the phrase implies a deliberate contrast with dynamic logic, where nodes may hold a charge and require clocking or precharging cycles to maintain state. In static CMOS, the state is derived directly from the current input combination, and the networks will either pull the output up to VDD or down to GND as long as the inputs remain in that state.
Now, considering potential alternative options (even though they are not provided here), a correct statement would center on: (a) strong, rail-to-rail output driven by complementary networks, (b) no reliance on capacitive storage for holding the value, (c) changes only when inputs change, and (d) independence from a clock in combinational logic.
If there were an option suggesting that static CMOS relies on persistent leakage or random charge to maintain the output, that would be incorrect. If there were an option claiming that static CMOS can’t guarantee a full rail-to-rail output or that the output toggles randomly without input changes, those would also be incorrect.
In summary, the given option captures the essential character of static CMOS: the output is actively driven to VDD or GND by a pair of complementary networks, and the output only changes when the inputs change, with no reliance on dynamic charge storage to hold the state between transitions.

FA25 ECE 555 001 Q2- Layout/Inverter

'Static' in Static CMOS logic is used to emphasize:

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