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Combining AC & DC signals

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ericmar

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combining ac signal and dc signal

May I know how to combine DC signal with AC signal?

Let say I hv an AC signal of 5V, 50Hz, and I want to couple my DC signal, +2V, into this AC signal and form a combined AC signal. How to do this? Can a summing applifier achieve wat I want?

Thanks,
Eric
 

Basically, you have two options:
- passive, using 2 resistors
or
- active - resistors + opamp ..
The latter method, active that is, is more accurate but requires addition single or dual-voltage power supply .. here is an example:
http://www.wam.umd.edu/~toh/ElectroSim/Adder.html

Regards,
IanP
 

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