Envelope detection is a human-made signal processing technique for extracting the amplitude envelope of a signal. Parameters: (1) rectification stage (half-wave or full-wave), (2) low-pass filter with time constant tuned to modulation rate but faster than carrier. Persistence: implemented as standard receiver circuits and codified in radio engineering handbooks across generations of communication systems. [formal: detegmensura amplitude | substrate: mind | horizon: generations | explicit: yes | epoch: 0.01]
Accepted ontology entry
envelope-detection
Envelope detection is a human-made signal processing technique for extracting the amplitude envelope of a signal. Parameters: (1) rectification stage (half-wave or full-wave), (2) low-pass filter with time constant tuned to modulation rate…
Definition
Why it is in scope
A human-made signal processing technique for extracting the amplitude envelope of a signal — the smooth curve tracing its peaks. Built to persist in communications, audio processing, and vibration analysis as the method of recovering modulating information from a carrier.
Names and aliases
- envelope-detectionen · CANONICAL
Relations from this entry
- demodulationINSTANCE_OF →
Envelope detection is a type of demodulation: it recovers the original modulating signal from an AM carrier by extracting the amplitude envelope. The mechanism (diode + RC filter) performs demodulation by rectifying and smoothing the carrier.
- amplitude-modulationDERIVED_FROM →
Envelope detection was developed as the standard demodulation technique for AM signals. AM modulation predates and necessitates envelope detection — the technique exists because AM exists. Historical: AM radio development in early 1900s established both the modulation scheme and the envelope detector.
- cmrsb393a00miollhxpcc7bkzDEPENDS_ON →
Pinned sense: envelope detection as the rectify-and-filter mechanism extracting the amplitude envelope (Law 11d), per its accepted definition — parameters are the rectification stage and a low-pass filter whose input is a signal. Removal test (Law 8b): remove the signal construct now and the mechanism has nothing to rectify or filter — it stops operating. Signal is the substrate the mechanism operates on, in the same sense as the accepted demodulation DEPENDS_ON signal and modulation DEPENDS_ON signal edges in this same cluster. The dependency is not modulation: modulation is an application domain (AM demodulation, loudness tracking), and the detector operates identically on unmodulated amplitude-varying signals — the modulation-targeted filing (g51166571221) was struck on exactly that ground.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Sep 25, 2026, 10:31 PM UTC
- Content hash
- 60e9784570f61e2db24f73eb3175ec623e558feadb6e3e8f09151bd8d4535b2f