# AC Analysis

Discussion in 'Homework Help' started by selfbg, Jun 11, 2010.

1. ### selfbg Thread Starter Member

Jun 11, 2010
23
0
Hello to all
I'm studying electronics (1st grade ) and I have one big problem. I cant understand how to make AC analysis of Differential Amplifier or other amp. Can someone refer me to any book

Sorry if my English is bad

2. ### mik3 Senior Member

Feb 4, 2008
4,846
69
Microelectronics by Sedra and Smith.

3. ### ELECTRONERD AAC Fanatic!

May 26, 2009
1,146
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I'll second that, it's an excellent book. Although if your in 1st grade, you might have some difficulty with the math involved.

4. ### mik3 Senior Member

Feb 4, 2008
4,846
69
Another nice book, which is easier to understand, is Electronics Principles by Malvino.

5. ### selfbg Thread Starter Member

Jun 11, 2010
23
0
I've seen the Electronics Principles by Malvino in the university library but it's in Spanish

6. ### hgmjr Retired Moderator

Jan 28, 2005
9,030
218
Can you post a schematic of the specific differential amplifer circuit complete with component values if available?

hgmjr

Jun 11, 2010
23
0
8. ### retched AAC Fanatic!

Dec 5, 2009
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Im guessing the 1st grade you are speaking of isn't the same 1st grade in America.

AC:

9. ### selfbg Thread Starter Member

Jun 11, 2010
23
0
Some of them yes Unfortunately I didn't find what I was looking for.

By 1st grade I mean the first year in the university. Languages are not my strength

10. ### selfbg Thread Starter Member

Jun 11, 2010
23
0
I ordered Microelectronic Circuit on ebay. Thank again for the help

11. ### Georacer Moderator

Nov 25, 2009
5,154
1,280
If you choose to deal the OpAmp as ideal, there are two conditions that are always true, and they are sufficient to solve your circuit:
$
I_+=I_-=0$
and $
V_-=V+
$

Use these equations to solve your circuit.
If there is no loop from the output of the OpAmp to its input, you might also need
$
V_o=A\cdot(V_+-V_-)
$

where A, the open loop gain of the OpAmp

Last edited: Jun 15, 2010