In 1919, the 18th Amendment to the U.S. Constitution, which prohibited the sale and manufacture of alcohol, was ratified. It went into effect on January 16, 1920âbeginning the era known as Prohibition.
Because time constant calculations are important, and often needed, it is better to make the definition of the time constant (T) in a CR circuit: THE TIME TAKEN FOR THE VOLTAGE ACROSS A CAPACITOR TO INCREASE BY 63.2% OF THE DIFFERENCE BETWEEN ITS PRESENT AND FINAL VALUES.
This defines the reason for the setup time within a flop. Reason for HOLD Time: As previously indicated, HOLD time is measured with respect to the active CLK edge only. In Figure 6, input data D is given to the inverter, or any other logic sitting before transmission gate T1, and is a part of the flip-flop.