Ex.6.1 draw Block Diagram Representation of a Second-order Difference Equation Mn]=ayn-I]+ayIn-2]+axn] [n]-aMn-l]-4[n-2]=b[n] Solution: x[n] bo y(n] y(n] Y(z)b X(z)1-4z1-4z y(n-1] =H(z) 02 y[n-2] 1010 Ex. 6.1 draw Block Diagram Representation of a Second-order Difference Equation 1 2 0 y n y n y n b x n [ ] [ 1] [ 2] [ ] = − + − + a a + a1 a2 y[n] y[n-1] y[n-2] 0 2 1 2 1 ( ) ( ) 1 Y z b X z a z a z − − − − = Solution: =H z( ) 1 2 0 y n y n y n b x n [ ] [ 1] [ 2] [ ] − − a a − − = z −1 z −1 y[n] x[n] + b0