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slope detection
slope detection n. 
/ˈsloʊp diˌtɛkʃ(ə)n/ Electronics the detection of a frequency-modulated signal by means of a slope filter followed by a detector for amplitude-modulated signals.
Brit. /ˈsləʊp dᵻˌtɛkʃn/
, /ˈsləʊp dᵻˌtɛkʃn/U.S. /ˈsloʊp dəˌtɛkʃ(ə)n/
, /ˈsloʊp dəˌtɛkʃ(ə)n//ˈsloʊp diˌtɛkʃ(ə)n/ΘΚΠ
the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > processes > [noun] > recovery of signal from carrier
detection1906
demodulation1920
leaky-grid detection1934
slope detection1949
1949 B. Grob Basic Television xxi. 433 While slope detection is seldom used in television receivers for reception of the associated sound signal, the principle is important because it illustrates how an FM signal can be received with an AM system.
1978 D. Cameron Audio Technol. Syst. iv. 129 Economy-type FM tuners occasionally use some form of slope detection.
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