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What are you asking about a 741 opamp IC? :?:shermaine said:Why is LM741 inappropriate as an internal operational amplifier in an IC? Is there any modifications that can be done?
audioguru said:[ent.
6) Most newer opamps are available as dual or quad opamps in one package.
Styx said:yup 741 was good at the time (ie it was the first real OPAMP) but there are soo much better ones out there
Nigel Goodwin said:Styx said:yup 741 was good at the time (ie it was the first real OPAMP) but there are soo much better ones out there
No, it wasn't the first 'real opamp' by a long way, but it was perhaps the first "idiot's opamp" because it was so simple to use. It's not very relevant though in the 21st century!.
The LM324 is only 3 years younger than the 741 and is 34 years old today. It is also has a low bandwidth and high noise. Because it is low power it has terrible crossover distortion.4electros said:such as LM324 ( Low Power Quad Operational Amplifiers )
audioguru said:.4electros said:such as LM324 ( Low Power Quad Operational Amplifiers )
Mutsubishi copied the LM324 and explains the 3% crossover distortion (at a gain of 1, it is even worse at higher gain) and a method to reduce it.
4electros said:Would you like to give us general advise about using operational amplifiers?
Correct. To allow the amplifiers in an LM324 to have low supply current, the design uses NO bias current in the output transistors like normal amplifiers have. It has a constant current sink of only 50uA to operate Q5 and Q6 in the class-A mode to reduce the crossover distortion when the opamp doesn't have a load.4electros said:What did you mean by explains 3% crossover distortion,did you mean that LM324 has a 3% distortion out of 741's?!
Dean Huster said:I have about 150 741C op amps at my disposal. If my project will work just fine with a 741 I already own, why in the world would I want to spend anywhere from $0.57 to $2.56 plus shipping and/or gas mileage to buy one that won't make my circuit perform any better?