Temperature detector having a pyroelectric device and impedance

Details Temperature detector having a pyroelectric device and impedance Temperature detector having a pyroelectric device and impedance

1988-09-27

1990-03-06

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

2503383, 374183, G01R 2700, G01J 502

Patent

active

049069187

ABSTRACT:
A temperature detector comprises a pyroelectric device (10) having electrodes (11, 12) on both main surfaces, with an insulating film (13) formed on one of the main surfaces. An impedance converting circuit formed of a field effect transistor (20) and resistance elements (18, 19) is electrically and physically connected between an electrode (11) exposed through a hole (14) formed in the insulating film and electrodes (15, 16, 17) formed on the insulating film. The detector is entirely covered by molded resin (24). Consequently, problems of disconnection and short circuit of leads between the pyroelectric device and the impedance converting circuit can be eliminated.

REFERENCES:
patent: 3846820 (1974-11-01), Lampe et al.
patent: 4110616 (1978-08-01), Porter et al.
patent: 4293768 (1981-10-01), Adachi et al.
patent: 4445034 (1984-04-01), Tomita et al.
patent: 4740700 (1988-04-01), Shaham et al.

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