"envelope detector" meaning in English

{
  "forms": [
    {
      "form": "envelope detectors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "envelope detector (plural envelope detectors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Electronics",
          "orig": "en:Electronics",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An electronic circuit that takes a relatively high-frequency amplitude modulated signal as input and provides as output the demodulated envelope of the original signal."
      ],
      "id": "en-envelope_detector-en-noun-QBh45y3d",
      "links": [
        [
          "electronics",
          "electronics"
        ]
      ],
      "raw_glosses": [
        "(electronics) An electronic circuit that takes a relatively high-frequency amplitude modulated signal as input and provides as output the demodulated envelope of the original signal."
      ],
      "synonyms": [
        {
          "word": "peak detector"
        }
      ],
      "topics": [
        "business",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "electronics",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "envelope detector"
}

{
  "forms": [
    {
      "form": "envelope detectors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "envelope detector (plural envelope detectors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Electronics"
      ],
      "glosses": [
        "An electronic circuit that takes a relatively high-frequency amplitude modulated signal as input and provides as output the demodulated envelope of the original signal."
      ],
      "links": [
        [
          "electronics",
          "electronics"
        ]
      ],
      "raw_glosses": [
        "(electronics) An electronic circuit that takes a relatively high-frequency amplitude modulated signal as input and provides as output the demodulated envelope of the original signal."
      ],
      "synonyms": [
        {
          "word": "peak detector"
        }
      ],
      "topics": [
        "business",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "electronics",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "envelope detector"
}