Author Topic: help in difficult college work  (Read 1198 times)

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Offline alex123Topic starter

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help in difficult college work
« on: April 19, 2020, 09:25:43 pm »

Hello everyone, I am a student of electronics chile.
I have this exercise which is difficult, I already solved 1.1
if they would help me solve or give ideas to solve,
  Thanks a lot
 

Offline pardo-bsso

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Re: help in difficult college work
« Reply #1 on: April 21, 2020, 11:11:30 am »
Hi Alex,

for 1.2 you might omit the inter-electrode capacitances and assume that all the capacitors present (those 1uF and 10uF) are an AC short.

Which books are you using?
 

Offline alex123Topic starter

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Re: help in difficult college work
« Reply #2 on: April 21, 2020, 10:28:45 pm »
hello pardo-bsso
we are using the book Microelectronic Circuits  Sedra y Kenneth C. Smith
 

Offline StillTrying

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Re: help in difficult college work
« Reply #3 on: April 22, 2020, 12:10:22 am »
Whoever set that "problem 1" didn't know what they were doing. :P

The input impedance is about 9k, output 6k8, and voltage gain about 500, in theory.
 
I can't find that question in the book, or the answer in the answers book.
« Last Edit: April 22, 2020, 12:14:57 am by StillTrying »
.  That took much longer than I thought it would.
 

Offline DimitriP

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Re: help in difficult college work
« Reply #4 on: April 22, 2020, 12:43:18 am »
Quote
I can't find that question in the book, or the answer in the answers book.

The problem doesn't "read" like the book, that's for sure :)
   If three 100  Ohm resistors are connected in parallel, and in series with a 200 Ohm resistor, how many resistors do you have? 
 

Offline alex123Topic starter

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Re: help in difficult college work
« Reply #5 on: April 22, 2020, 01:19:45 am »
Hello everyone ,
This is a exercise that my teacher saw on the internet.
the exercise is not in the book, it is only the guide book of the course
 

Offline alex123Topic starter

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Re: help in difficult college work
« Reply #6 on: May 01, 2020, 11:54:39 pm »
in question 1.1
hfe1 and hfe 2 = 100, veb = 0.7 (data taken from datasheet)
Ib1 = -268 nA, Ib2 = 7.49 uA
Ic1 = -26.8 uA, Ic2 = 748.8 uA
I am working on the following questions
 

Offline StillTrying

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Re: help in difficult college work
« Reply #7 on: May 02, 2020, 01:57:06 pm »
"I am working on the following questions"

How many weeks do you get for each question. :) I've done it the easy way.

.  That took much longer than I thought it would.
 


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