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Hi, I was just curious, I am no EE, I am an ME and I am trying to make something smaller if you have read my other posts you might know what's it all about, anyways I've been reading a lot about single supply op amps and that's probably the best choice to reduce the amount of power my circuit will take, I want to try to run it off batteries if possible.
Here are 2 circuits, The one on the top is the original op amp using an LM324 but using it with double supply +/- 5V, I am trying to achieve the same thing but using a single +5V supply and a VREF (VEE) that's half of that (roughly 2.5 V) or maybe less?
What I would like help with is finding out the values that will give me an equivalent circuit? How do I find the values of all C's and R's such that the signal is processed in the same fashion as the original (top) circuit?
Thanks for all your help so far
http://img41.imageshack.us/img41/7928/0fph.png
NOTE: for the top circuit, pins 4 and 11 are connected to +/- 5V respectively
as you can see I used the fourth op amp (of the LM324) to make a virtual ground, or reference voltage VEE which should be half of VCC (I don't know what resistor values I should use tho)
Here are 2 circuits, The one on the top is the original op amp using an LM324 but using it with double supply +/- 5V, I am trying to achieve the same thing but using a single +5V supply and a VREF (VEE) that's half of that (roughly 2.5 V) or maybe less?
What I would like help with is finding out the values that will give me an equivalent circuit? How do I find the values of all C's and R's such that the signal is processed in the same fashion as the original (top) circuit?
Thanks for all your help so far
http://img41.imageshack.us/img41/7928/0fph.png
NOTE: for the top circuit, pins 4 and 11 are connected to +/- 5V respectively
as you can see I used the fourth op amp (of the LM324) to make a virtual ground, or reference voltage VEE which should be half of VCC (I don't know what resistor values I should use tho)
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