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Using the double-balanced mixer

Using the double-balanced mixer
In radio frequency electronics a mixer is a non-linear circuit or device that permits frequency conversion by the process of heterodyning. Mixers are used in the 'front-end' of the most common form of radio, the superheterodyne (regardless of wave band), in certain electronic instruments and in certain measurement schemes (receiver dynamic range, oscillator phase noise, etc). This article looks at a very popular mixer circuit, the double balanced type.
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