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This article is about the analog electronics technique. For the digital signal processing technique, see Envelope estimator.
An envelope detector (sometimes called a peak detector) is an electronic circuit that takes a (relatively) high-frequency amplitude modulated signal as input and provides an output, which is the demodulated envelope of the original signal.
A signal and its envelope marked with redA simple envelope demodulator circuit.A signal in blue and the magnitude of its analytic signal in red, showing the envelope effect
An envelopedetector (sometimes called a peak detector) is an electronic circuit that takes a (relatively) high-frequency amplitude modulated signal as...
A product detector is a type of demodulator used for AM and SSB signals. Rather than converting the envelope of the signal into the decoded waveform like...
of a diode which is configured to act as envelopedetector. Another type of demodulator, the product detector, can provide better-quality demodulation...
rectifying the modulated carrier, is called an envelopedetector. The audio frequency current produced by the detector passed through the earphone causing the...
sets use modern semiconductor diodes. The crystal functions as an envelopedetector, rectifying the alternating current radio signal to a pulsing direct...
the low-pass filter directly after the envelopedetector. It's the bandwidth of the signal chain after the detector. Averaging or peak detection then refers...
by the radio's speaker. It is accomplished by a circuit called an envelopedetector (see circuit), consisting of a diode (D) with a bypass capacitor (C)...
A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference in...
required for their construction. Metal rectifiers were also used as envelopedetector (AM demodulator) diodes in radio receivers. The WX6 Westector was...
the desired reception frequency. This is followed by a detector, typically an envelopedetector using a diode, followed by audio amplification. This was...
Villard cell stage with what is in essence a peak detector or envelopedetector stage. The peak detector cell has the effect of removing most of the ripple...
can be recovered ("detected") by either synchronous detector circuits or by simple envelopedetectors because the carrier and both sidebands are present...
By the 1940s, automatic defect detectors included infrared sensors for hotboxes, wires outlining the clearance envelope to detect high and wide loads,...
(**p) For big p it can serve as an envelopedetector on a rectified signal. For small p it can serve as a baseline detector on a mass spectrum. Arithmetic–geometric...
A building envelope or building enclosure is the physical separator between the conditioned and unconditioned environment of a building, including the...
is sometimes credited as the first semiconductor in history. The envelopedetector is an important part of every radio receiver. 1907: Rosenthal puts...
detector article. In summary, an AM signal consists of alternating positive and negative peaks of a radio carrier wave, whose amplitude or envelope is...
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