Hardware and Software for Digital Signal Processors - Digital Signal Processing: Fundamentals and Applications - page 451

with a passband gain of 2, and the input being half of the range, use the direct-form I method
to develop the DSP implementation equations in the Q-15 fixed-point system.
9.27. Repeat Problem 9.26 using the direct-form II method.
9.28. Given the IIR filter
yðnÞ¼ 0 : 72 xðnÞþ 1 : 42 xðn 2 Þþ 0 : 72 xðn 2 Þ 1 : 35 yðn 1 Þ 0 : 5 yðn 2 Þ
with a passband gain of 1 and a full range of input, use the direct-form I to develop the DSP
implementation equations in the Q-15 fixed-point system.
9.29. Repeat Problem 9.28 using the direct-form II method.