Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition
7th Edition
ISBN: 9780199339136
Author: Adel S. Sedra, Kenneth C. Smith
Publisher: Oxford University Press
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Chapter 5, Problem D5.46P

(a)

To determine

The value of R required to establish a current in Q1.

(b)

To determine

Thevalue of W2and R2so that Q2operates at edge of saturation with a given current.

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Continue on RC time constant... To keep RC time constant unchanged. If R increases then C decrease and vise versa. Casel: R is real big, C is real small to keep the time constant UNCHANGED Case2: R is real small,C is really big to keep the time constant UNCHANGED. For both cases, does the RC circuit still work? Please discuss regarding R changing. What about charging current when R=big and R=small.
3 A CdS cell (R1 in the shown circuit) has a dark resistance of 100 kn and resistance in a light beam of 20 kn. The cell time constant is 72 ms. The circuit is designed to get VD= 8 V within 12 ms of the beam interruption. If Vs=13 V, answer the following questions: Vs R1 VD R2 Find the value of R2 Find the value of R2 Oa. 53.65 ka Ob. 49.65 kn Oc. 55.65 kn "Od. 51.65 kn What time will be taken for VD to reach 7 V when the light beam strikes the cell (assuming the cell was in the dark for a long time). Oa. 83.9 ms Ob. 85.9 ms Oc. 87.9 ms Od. 89.9 ms
Question 1.a The transistor has beta= 120  and VBE= 0.7 V.It is known:The resistance RE= 1.2 kiloohms.At the same time the absolute potential at terminal A(+6V) and at terminal B(-6 V)For simplicity you can use IE aproximadamente IC.Analyze at DC and determine:a) The value of RB so that ICQ = 0.5 x ICsat.

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Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7th edition

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