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# Polarity Key Note

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### Polarity Key Note

1. 1. Simple Waveform Polarity and Interaction
2. 2. a simple sine wave the signal is bi-polar (it oscillates between positive and negative values)
3. 3. Polarity • the property of being polar (having positive and negative values) • the relationship between the positive and negative portions of two waves
4. 4. same polarity • these two signals have the same polarity • when one is positive, the other is also positive • when one is negative, the other is also negative
5. 5. different signals - same polarity • these two signals are different, but they have the same polarity • when one is positive, the other is also positive • when one is negative, the other is also negative
6. 6. opposite polarity • these two signals have opposite polarity • when one is positive, the other is negative • when one is negative, the other is positive
7. 7. What happens when two identical signals are combined (added together)?
8. 8. same polarity addition • these two signals have the same polarity • when they are combined (added together)...
9. 9. the amplitude doubles =
10. 10. What happens when two signals with opposite polarity are combined (added together)?
11. 11. opposite polarity addition • these two signals have opposite polarity • when they are combined (added together)...
12. 12. the waveforms cancel each other out =