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# confused with op amps ... any tips how to study op amps?

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#### esam7

##### Newbie level 3
tips about when i am confused,

there are so many circuits... i am confused wat to study and wat not to ?
any advice on op amp?... am refering roy choudhary "linear integrated circuits"..

is newbie tortured on edaboard or wat?

esam7 said:
there are so many circuits... i am confused wat to study and wat not to ?
any advice on op amp?... am refering roy choudhary "linear integrated circuits"..
is newbie tortured on edaboard or wat?

Your question is not easy to answer. Nevertheless, here are some poits I consider as important.
1.) Understand the function and the properties of a simple differential amplifier
2.) Modify this amplifier by using two supplies with the aim to allow a bias voltage at the inputs of zero volts.
3.) Realize, that an opamp is nothing else than a "very good" and specialized differential amp with a very high gain Ao and a low output impedance with a dc output voltage of zero.
4.) Understand the role of "unbalance" (mismatching of components) which leads to the definition of the OFFSET voltage.
5.) Use feedack theory to understand why the problem of offset is minimized by applying negative feedback to the opamp.
6.) Calculate the output voltage and the gain of the opamp with feedback by applying the superposition theorem or the KCL rules.
7.) Realize the simplification in the gain formula by letting Ao (open loop gain) approach infinite.
8.) If you have understood every point, you will be able to understand nearly all other application circuits.
________________
Good luck
LvW

### esam7

Points: 2
focus.ti.com/lit/an/slod006b/slod006b.pdf

All the best

### esam7

Points: 2
thank u very much

akkrz

### akkrz

Points: 2
find an opamp datasheet in any company's website, and try to design a similar one, through the process of designing, you will know more about opamp.

Points: 2