Question

If the step response of a system is given by A(-n), then the impulse response of the same system is

• A. $A(-n)+A(-n+1)$
• B. $A(-n)-A(-n+1)$
• C. $A(-n)-A(-n-1)$
• D. $A(-n)+A(-n+1)$

Answer 1

The correct option is B $A(-n)-A(-n+1)$

$h\left(n\right)=s\left(n\right)-s(n-1)$

where h(n) is the impulse response and s(n) is the step response

h(n) = A(-n)-A(-n+1)