hi there everybody
browsed the forums for a while, but only recently registered my own account. First, great place, tons of info and invaluble expertise! I was hoping you all could help me with a little quandry of my own.
I noticed that another member was asking about power supplies to op amps, and now I have a similar question.
I would like to run an op amp off of a dc current from only one source, a battery. I found this on the internet and had a few questions about it.
https://www.electro-tech-online.com/custompdfs/2007/05/singlesupply.pdf
(figure 7 at the bottom of the doccument)
What they are trying to do is create a phantom ground for the op amp. Unfortunately I have no electrical engineering degree, only years of fooling around with electronics, so I am a bit uneducated.
I will be using the op amp to power a fet and I assume I will still use the output of the op amp directly into the base of the fet, however I do not understand why the output is grounded.
Also, how is it that there are grounds within this circuit if there is no ground? (hence one battery source) are these ground points different from other ones I may have from the input circuit? Are they just common connection points within this circuit?
Bassically I want to know how to use this effectively, I will have three stages in my circuit, an input, this op amp, and a fet. I want it all off of the same power source.
Thanks for takin a look.
browsed the forums for a while, but only recently registered my own account. First, great place, tons of info and invaluble expertise! I was hoping you all could help me with a little quandry of my own.
I noticed that another member was asking about power supplies to op amps, and now I have a similar question.
I would like to run an op amp off of a dc current from only one source, a battery. I found this on the internet and had a few questions about it.
https://www.electro-tech-online.com/custompdfs/2007/05/singlesupply.pdf
(figure 7 at the bottom of the doccument)
What they are trying to do is create a phantom ground for the op amp. Unfortunately I have no electrical engineering degree, only years of fooling around with electronics, so I am a bit uneducated.
I will be using the op amp to power a fet and I assume I will still use the output of the op amp directly into the base of the fet, however I do not understand why the output is grounded.
Also, how is it that there are grounds within this circuit if there is no ground? (hence one battery source) are these ground points different from other ones I may have from the input circuit? Are they just common connection points within this circuit?
Bassically I want to know how to use this effectively, I will have three stages in my circuit, an input, this op amp, and a fet. I want it all off of the same power source.
Thanks for takin a look.