frequency mixer
Technical term in electronics for a device that combines two signals to produce new frequencies.
In this circuit, a frequency mixer is used to convert the signal.
I used a mixer to make the cake.
Standard kanji spelling for both senses, though sense 2 is more commonly written 混合機.
Preferred spelling for the ingredient/kitchen mixer sense.
Compound of 混合 (mixing) + 器 (device). The alternative kanji 機 (machine) is often used for the kitchen appliance sense.