Pyroelectric infrared ray sensor

Details Pyroelectric infrared ray sensor Pyroelectric infrared ray sensor

1997-11-18

1999-09-07

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01J 500

Patent

active

059490721

ABSTRACT:
A pyroelectric infrared ray sensor is constituted with a current-voltage converting circuit utilizing an impedance of feedback capacity, obtained by adding the feedback capacity to an operational amplifier receiving as an input an element current from a pyroelectric element, whereby the current-voltage converting circuit can be improved in S/N ratio without altering characteristics of the pyroelectric element.

REFERENCES:
patent: 4803363 (1989-02-01), Gaalema et al.
patent: 4849737 (1989-07-01), Kirihata et al.
patent: 4851681 (1989-07-01), DePaili
patent: 4973843 (1990-11-01), Murata et al.
patent: 5684303 (1997-11-01), Kim et al.

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