模拟电子基础第十五章题库

一、选择题

1. The following circuit in the figure below is ( A )

(A) Two-Pole Low-Pass Butterworth Filter (B) Two-Pole High-Pass Butterworth Filter (C) Two-Pole Band-Pass Butterworth Filter (D) Three-Pole Low-Pass Butterworth Filter

2.In the Bode-diagram, the slope of the curve in the stop-band is ( C )

(A)-20dB/decade (B) -30dB/decade (C) -40dB/decade (D) -50dB/decade 3. The following circuit in the figure below is ( B ) (A) Two-Pole Low-Pass Butterworth Filter (B) Two-Pole High-Pass Butterworth Filter (C) Two-Pole Band-Pass Butterworth Filter

(D) Three-Pole Low-Pass Butterworth Filter

4.In the Bode-diagram, the slope of the curve in the stop-band is ( C )

(A)20dB/decade (B) 30dB/decade (C) 40dB/decade (D) 50dB/decade

5. The order of the Low-Pass Butterworth Filter as shown in the figure is ( C )

(A)1 (B)2 (C)3 (D)4

6. The order of the High-Pass Butterworth Filter as shown in the figure is ( C )

(A)1 (B)2 (C)3 (D)4

7. The order of the Butterworth Filter as shown in the figure is ( D )

(A)1 (B)2 (C)3 (D)4

8. The order of the Butterworth Filter as shown in the figure is ( D )

(A)1 (B)2 (C)3 (D)4

9.Swithed-capacitor is used as which kind of device in IC design ( D )

(A) inductor (B) capacitor (C) diode (D)resistor

10. The relation of R2 and R for stable oscillation ( D )

(A)R2=5R (B) R2=6R (C) R2=7R (D) R2=8R 11. The angle frequency of the output voltage must be ( A ) (A) ?0?13RC (B) ?0?12RC (C) ?0?15RC (D) ?0?17RC