this post was submitted on 21 Aug 2025
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This is the content I’m here for! Please continue I want to learn more
There's an active region between on and off where the current from the collector to emmiter is proportional to the base current. This can be used in other applications like amplifiers. But in digital applications that active region is the transition time between low and high states.
In order to obtain a deterministic outcome the rising edge must be predictable and it must stay at a logic level 1 for long enough to account for propagation delay. These considerations are known as setup and hold. The higher the frequency the clock runs, the tighter these constraints become.