Hãy xác định Y ( Z ) từ sơ đồ sau:

$Y\left(Z\right)=H\left(\frac{1}{Z}\right)\cdot X\left(Z\right)$

$\text{Y}\left(\text{Z}\right)=\text{H}(\text{Z}){}^{\text{*}}\text{X}\left(\text{Z}\right)$

$Y\left(Z\right)=X\left(\frac{1}{Z}\right)\cdot H\left(Z\right)$

$Y\left(Z\right)=H\left(Z\right)\cdot X\left(Z\right)$