In the early days of radio, these signal detectors were made using discrete components, but modern radios will use integrated circuits with inbuilt detectors.Īs a result of its cost and convenience, the AM diode envelope detector has been widely used for many years in transistor portable radios.Īlthough its simplicity has been the main reason for its widespread use, its performance is not as good as other types of AM detector / demodulator, particularly with respect to the distortion levels. The AM diode detector can be built from just a diode and a few other components and as a result it is a very low cost circuit block within an overall receiver. The diode detector is the simplest and most basic form of amplitude modulation, AM signal detector and it detects the envelope of the AM signal. Modulation formats: Modulation types & techniques Frequency modulation Phase modulation Quadrature amplitude modulation Diode Detector: AM Diode Envelope Demodulator The diode detector is the simplest form of detector or demodulator used for AM demodulation – it detects the AM signal envelope.Īmplitude Modulation, AM Tutorial Includes:Īmplitude modulation, AM AM basic theory & formulas AM bandwidth & sidebands Modulation index & depth AM efficiency AM demodulation / detection Diode detector Synchronous detector AM modulators Single sideband, SSB SSB demodulation

What is an envelope filter