Introduction The desired transfer function is H(二)= 1-z 12-c The actual transfer function implemented is H(二) which may be much different from the desired transfer function H(Introduction • The desired transfer function is   − = − = − z z z H z 1 1 1 ( ) − = z z H(z) ^ ^ which may be much different from the desired transfer function H(z) • The actual transfer function implemented is