Detectors 117
Detectors 117 : Particle Detectors: (4.8) Envelope Detector: (4) Drawbacks: The envelope detector has several drawbacks: (a) The input to the detector must be band-pass filtered around the desired signal, or else the detector will simultaneously demodulate several signals. The filtering can be done with a tunable filter or, more practically, a superheterodyne receiver; (b) It is more susceptible to noise than a product detector; (c) If the signal is overmodulated, distortion will occur; (d) Most of these drawbacks are relatively minor and are usually acceptable tradeoffs for the simplicity and low cost of using an envelope detector
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