Pyroelectric infrared ray sensor

Details Pyroelectric infrared ray sensor Pyroelectric infrared ray sensor

1997-11-18

1999-06-29

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503382, G01J 510

Patent

active

059171871

ABSTRACT:
A pyroelectric infrared ray sensor includes a voltage amplifying circuit provided with a signal amplifying part having a non-inverting amplifier, with an integrating circuit, and with voltage dividing resistors connected at a position where an input V.sub.IN to the voltage amplifying circuit and an output V.sub.B of the integrating circuit are resistance-divided to a non-inverting input terminal of the signal amplifying part which is practically formed by an operating amplifier, wherein the signal amplifying part includes a low-pass filter formed by a resistor and a capacitor, whereby the electrostatic capacity of the required capacitor can be minimized, and the entire circuit can be minimized in size and also in manufacturing costs.

REFERENCES:
patent: 5508546 (1996-04-01), Zalameda et al.

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