ThermalRunaway
New Member
Hi everyone,
I'm thinking of using an envelope detector in order to detect the presense of a 200Khz waveform. When an envelope detector is used for the task which it was originally designed for, you feed in an AC signal which has been modulated with a much higher frequency waveform, and the envelope detector then strips away the high frequency part leaving just the original AC signal as in the attached diagram.
However, all I want to do is detect the presense of a 200Khz AC signal. If I were to feed a standard sine-wave 200Khz signal which hasn't been used as a carrier into an envelope detector, am I correct in thinking that I would get a DC-level output directly related to the amplitude of the original 200khz waveform?
Any thoughts on this?
Brian
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I'm thinking of using an envelope detector in order to detect the presense of a 200Khz waveform. When an envelope detector is used for the task which it was originally designed for, you feed in an AC signal which has been modulated with a much higher frequency waveform, and the envelope detector then strips away the high frequency part leaving just the original AC signal as in the attached diagram.
However, all I want to do is detect the presense of a 200Khz AC signal. If I were to feed a standard sine-wave 200Khz signal which hasn't been used as a carrier into an envelope detector, am I correct in thinking that I would get a DC-level output directly related to the amplitude of the original 200khz waveform?
Any thoughts on this?
Brian
[/img]