Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1984-12-05
1986-12-02
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250370, G01J 506, G01J 504
Patent
active
046266879
ABSTRACT:
In an infrared sensor having a pyroelectric element and a FET in a high frequency electric field and infrared radiation shielding case, a capacitor is located in the case and connected to at least one of the drain and source electrodes of the FET in order to remove an influence due to an external high-frequency electric field.
REFERENCES:
patent: 4152595 (1979-05-01), Garfinkel et al.
patent: 4258259 (1981-03-01), Obara et al.
Anon., "Passive Intruder Alarm Using a Triglycine Sulphate Infra-red Detector", The SERT Journal, vol. 5 (Mar. 1971), pp. 34-35.
Endo Yasushi
Nara Motohisa
Hannaher Constantine
Howell Janice A.
Kureha Kagaku Kogyo Kabushiki Kaisha
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