Frequency mixer

In telecommunication, a mixer is a nonlinear circuit or device that accepts as its input two different frequencies and presents at its output (a) a signal equal in frequency to the sum of the frequencies of the input signals, (b) a signal equal in frequency to the difference between the frequencies of the input signals, and, if they are not filtered out, (c) the original input frequencies.

Related Topics:
Telecommunication - Mixer - Nonlinear - Circuit - Input - Output - Signal - Frequency

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Source: from Federal Standard 1037C

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Mixers have three ports. The LO (local oscillator) port, RF (radio frequency) port and IF (intermediate frequency) port. To achieve the sum of two frequencies, input one signal into the LO port and the other signal into the IF port. The RF port will be the output. To achieve the difference of two frequencies, input one signal into the LO port and the other signal into the RF port. The IF port will be the output.

Related Topics:
LO - RF - IF

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