What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?
The ratio
The average
The sum and difference✓الإجابة الصحيحة
The arithmetic product
الشرح
Nonlinear mixing creates new frequencies at LO+RF and LO-RF, and the IF filter selects one of them. An arithmetic product of the two frequencies is not what appears in the output.