EE 3235 Electronics II
Homework # 6
Note:
1) Some of the problems use Figures in text part of the book, whereas some of them use
the Figures in the Problem Section. In the later case, there is usually a letter P before the
figure number.
2) You are supposed to work on it independently, but helpful discussion is encouraged.
3) Please write down necessary solving steps to get full credit.
1. in the book, Page 654, problem 9.85
2. in the book, Page 655, problem 9.89
3. in the book, Page 655, problem 9.91
4. in the book, Page 792, problem D11.9 (You do not have to attach
SPICE simulation results for this problem. The answer should include
the schematic of the filter circuit, the values for all the resistor and
capacitor in the circuit).
Hint: To solve this problem, it is suggested first to determine the order
of the filter to achieve the specification. Note that Sallen-Key filter,
which is a 2nd order filter, has about 40db/decade drop around the
3db bandwidth. Also, the problem states a passband gain of 10. Note
that if you cascade a few Sallen-Key circuits, the passband gain is
determined by the product of the individual gain of each stage, which
is usually lower than 10. You can add an amplifier stage to enhance
the gain.