i know the basics, Anyone know anything about LM 324Any opamp will work with a single supply voltage if the inputs are biased at a voltage in between the 0V and positive supply voltage (the allowed input common-mode voltage range). The input and output might need a coupling capacitor.
An opamp has a voltage gain of about 200,000 at DC and low frequencies.
It has a very high input impedance and a low output impedance.
Negative feedback is used to reduce the gain to a useable amount, increase the input impedance, reduce the output impedance, reduce distortion and increase bandwidth.
good advice i think. still confused. new to op-amps.http://instruct1.cit.cornell.edu/courses/ee476/ideas/singlesupply.pdf
This seems to be a good article on the subject.
I'm not sure of the exact definition of a single-supply op-amp (and perhaps my definition is too narrow), but when I think about single supply op-amps, the key features that comes to mind is that the output should be able to go extremely close to the negative rail (ground for single supply), or even right to ground, and the input voltages should be able go all the way to (or even below) ground without issues. Even rail-to-rail op-amps do not allow the output to go completely to the negative rail and sometimes that 10 to 50 mV difference is very important. Also, not all op-amps let the input go to the negative rail without problems.
What if you want to make a simple non-inverting op-amp buffer with a single supply that accepts inputs to ground and drives voltage all the way to ground? Usual dual-supply op-amps (even rail-to-rail) won't do it.
Yeah, it can still be confusing even when you're not new to op-amps. To simplify things, we should distinguish between "single-supply op-amps" and op-amps used in "single-supply applications". Usual op-amps are really dual-supply devices, even though they can be used either with dual, or single supplies. However, there are special considerations when a dual-supply op-amp is used with a single supply, and that article seems to discuss those details. Single-supply op-amps can have better performance in single-supply applications, but these considerations really get into some nitty-gritty details.good advice i think. still confused. new to op-amps.
can i send my schematic as multisim.The lousy old LM324 has trouble at frequencies higher than only 2kHz. It has crossover distortion. It is noisy.
Please attach your schematic so we can see what is missing.
If you post it in Multisim format, only those with Multisim will be able to view it.can i send my schematic as multisim.