- Joined Dec 29, 2010
I was looking up schematics for a gibert cell,but I have no idea what's the underlying concept for it. Can anyone explain how this and other frequency mixers work?
Briefly - a mixer involves combining two waveforms in some non-linear way, usually via multiplication (as opposed to addition which IS linear). The non-linear combination of signals at two different frequencies results in creating a product that contains energy at the sum and difference frequencies of the inputs and the harmonics thereof. Refresh yourself on the trigonometric identities of multiplying sine waves, and you'll see that sum and difference frequencies are created.I was looking up schematics for a gibert cell,but I have no idea what's the underlying concept for it. Can anyone explain how this and other frequency mixers work?
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by Jake Hertz