Rowe, Harrison E. Department of Electrical Engineering and Computer Science, Stevens Institute of Technology, Hoboken, New Jersey.
- Nonlinear devices
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The principle that multiple frequencies applied to a nonlinear device produce new frequencies that are sums and differences of the applied frequencies and their harmonics. Heterodyning, or mixing, is the process of multiplying a weak signal by a strong sinusoidal carrier, sometimes called the local oscillator, to shift the frequency of the signal in such a way that the information carried by the signal is preserved. See also: Carrier (communications); Mixer
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