Pyroelectric device

Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive

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G01J 510

Patent

active

053528956

ABSTRACT:
A pyroelectric device includes a pyroelectric member for detecting infrared radiation, a transistor whose gate electrode is connected to one of the terminals of the pyroelectric member, a drain terminal connected to a drain electrode of the transistor, a source terminal connected to a source electrode of the transistor, a grounding terminal connected to the other terminal of the pyroelectric member, and a gate resistor connected between the terminals of the pyroelectric member. The gate resistor used in a pyroelectric device for a fire detection has a resistance ranging from 5 to 50 gigaohms, and the gate resistor used in a pyroelectric device for an intrusion detection has a resistance equal to or less than 30 gigaohms.

REFERENCES:
patent: 3769096 (1973-10-01), Ashkin et al.
patent: 4258259 (1981-03-01), Obara et al.
patent: 4542294 (1985-09-01), Tamura et al.
patent: 4626687 (1986-12-01), Nara et al.
patent: 4851682 (1989-07-01), Moriyama et al.

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