13.10.2012 Views

boylistad

boylistad

boylistad

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Solutions:<br />

a. Charging phase:<br />

vC � E(1 � e �t/t )<br />

t � R1C � (100 � 10 3 �)(0.05 � 10 �6 F) � 5 � 10 �3 s<br />

� 5 ms<br />

vC � 10(1 � e �t/(5�10�3 )<br />

)<br />

b. iC � e �t/t E<br />

� R1<br />

10 V<br />

3<br />

100 � 10 �<br />

� e �t/(5�10�3 )<br />

��<br />

i C � (0.1 � 10 �3 )e �t/(5�10�3 )<br />

c. Storage phase:<br />

vC � E � 10 V<br />

iC � 0 A<br />

d. Discharge phase (starting at 48 ms with t � 0 s for the following<br />

equations):<br />

vC � Ee �t/t′<br />

t′ � R 2C � (200 � 10 3 �)(0.05 � 10 �6 F) � 10 � 10 �3 s<br />

� 10 ms<br />

v C � 10e �t/(10�10�3 )<br />

E<br />

iC �� e �t/t′<br />

�<br />

R2<br />

�� e �t/(10�10�3 )<br />

��<br />

i C � �(0.05 � 10 �3 )e �t/(10�10�3 )<br />

e. See Fig. 10.43.<br />

10 V<br />

0.1<br />

v C (V)<br />

10 V<br />

3<br />

200 � 10 �<br />

48<br />

0 10 20 25 30 40 50 60 70 80 90 100 t (ms)<br />

5t 5t'<br />

(t' = 2t)<br />

i C (mA)<br />

0 10 20 25 30 40<br />

t (ms)<br />

–0.05<br />

5t<br />

5t'<br />

(t' = 2t)<br />

FIG. 10.43<br />

The waveforms for the network of Fig. 10.42.<br />

98<br />

48 98<br />

50 60 70 80 90 100<br />

DISCHARGE PHASE ⏐⏐⏐ 397

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!