An electronic mixer is a piece of equipment for mixing two or more electronic signals. There are two basic types of mixer Additive mixers add two signals collectively, and are used for such applications as audio mixing. Multiplying mixers increase the signals together, and produce an output containing both original signals, and new signals that have the sum and difference of the frequency of the original signals.
Additive mixers are generally resistor networks, surrounded by impedance matching and amplification stages.
Multiplying mixers have been completed in a wide variety of ways. The most popular are diode mixers, gilbert cell mixers, diode loop mixers and switching mixers.
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