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schematic diagram of lm324 quad op-amp?
i have no idea what the lm324 quad op amp is, but i have to draw a schematic of it. I found one on this http://www.hobbyengineering.com/specs/Fairchild-LM... but i don't know if it is right. it looks really confusing.
3 Answers
- RogerLv 71 decade agoFavorite Answer
Basically an op amp contains a differential amplifier, Q1 through Q4 make a differential amplifier. Q5 and Q6 are the current source for the difference amplifier, they keep the current constant in Q1 through 4, this enhances linearity. Q8 and Q9 form a current mirror which makes the current constant in the collectors of Q2 and Q3. Q10 amplifies output of Q3. The output of Q10 is connected to the emitter follower Q11 which provides current gain. Q12 and Q17 are current sources. Q12 drives Q15, this is the driver of output transistors Q19/Q20 and Q21. Q19/20 and Q21 are emitter followers which provides current gain but no voltage gain. Resistor R2 and Q18 provide current limiting to the op amp output. This prevents the output transistors from being damaged. Hope this helps
- billrussell42Lv 71 decade ago
That is the correct part.
Just look at it bit by bit. The 4 opamps are identical, just connected to different pins.
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