Test: Propagation Delays - Electrical Engineering (EE) MCQ

Propogation time is directly proportional to square of the propogation distance (x² ). It is the time taken by the signal to move from input port to output port.

The total resistance can be given as the product of nrRs where r is the relative resistance per section in terms of Rs.

Total capacitance can be given as the product of nc(square Cg) where c is the relative capacitance per section in terms of square Cg.

The overall delay is directly proportional to n² , where n is the number of pass transistors in series.

The number of pass transistors connected in series can be increased by connecting buffer in between.

Buffer is used for long polysilicon runs because it increses the speed and reduces the sensitivity to noise.

 The overall delay is directly proportional to the relative resistance r. Overall delay is given as product of n^2rcƮ.

Small disturbanes of noise switches the inverter stage between 0 and 1 or vice versa. It disturbs the normal operation or behaviour.

The buffer speeds up the rise time of propogated signal edge. A buffer is the combination of two inverters in which one output is fed to the other as the input.

Overall delay increases as n increases where n is the number of pass transistors connected in series.