re there ready made analogue adder/ subtractor ics?
if so can someone give me some ic numbers.
Op amps can indeed perform a lot of functions (they are rather the Swiss Army knife of analog circuits) but they cannot do multiplication or division unless you have added non-linear circuits to help perform those functions.................
of course you can easily do all kind of mathematics with op amps . for adding or subtraction or multiplication or division or integral or differential or ... .
Hi crutschowOp amps can indeed perform a lot of functions (they are rather the Swiss Army knife of analog circuits) but they cannot do multiplication or division unless you have added non-linear circuits to help perform those functions.
Yes, but that generally works only for a limited range of single quadrant signals. For a wide range of 4-quadrant signals you need a Gilbert Cell type multiplier.........................
Certainly either multiplication or division are requiring the e^alpha*t function which can be achieved by a simple diode or transistor.
Yes, but that generally works only for a limited range of single quadrant signals
I'm glad because i'm learning new things from you . in fact i have never designed any kind of gilbert cell . may you tell me more about it please ? i had a bit search regarding that in google and i have found something but i couldn't understand how it works as well , so i'll be grateful if you tell me more about it .For a wide range of 4-quadrant signals you need a Gilbert Cell type multiplier.
Hi crutschowYou don't normally design a Gilbert cell unless you are making an IC
Mainly it's that the cell is complex and requires close matching of the transistors to minimize offsets in it's operation which is difficult with discrete transistors but easy on an IC. Since Gilbert cell IC multipliers are readily available there is no good reason to try to design a discrete one. You certainly can build one, if you like, but the resulting circuit will likely operate poorly and only be useful to demonstrate it's operation, not for practical use.May i ask you why unless we are about to design an IC ? is there any problem with designing them ?
Let me confess when i want design a multiplier or divider i prefer to use AD633 which was very good till now .
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Mainly it's that the cell is complex and requires close matching of the transistors to minimize offsets in it's operation which is difficult with discrete transistors but easy on an IC. Since Gilbert cell IC multipliers are readily available there is no good reason to try to design a discrete one. You certainly can build one, if you like, but the resulting circuit will likely operate poorly and only be useful to demonstrate it's operation, not for practical use.
Hi crutschowYou might look at this or this. I've never designed one so that's all I know about them.
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