Title:
【発明の名称】赤外線検出装置
Document Type and Number:
Japanese Patent JPH0821731
Kind Code:
B2
Abstract:
PURPOSE:To enable the output to be stabilized by a method wherein a diode connected in parallel with a pyroelectric detecting element as well as a field effect transistor wherein a cathode of the diode is connected to a gate while the space between a drain and a source is impressed with a specific voltage are provided. CONSTITUTION:A drain of a junction type field effect transistor (J-FET) 3 is hung down by a positive power supply voltage VDD; a cathode of a diode 4 is connected to a gate; and one end of a negative resistor R3 is connected to a source. Besides, the diode 4 is connected in parallel or inverse parallel with a pyroelectric detecting element 5. Accordingly, the input impedance seen from the pyroelectric detecting element 5 to the gate side of the field effect transistor 3 is augmented. Through these procedures, the conventional resistor in high resistance value can be eliminated, thereby enabling the output to be stabilized.
Inventors:
MYAGUCHI KAZUHISA
HOSHINO YASUSHI
YAMAMOTO AKINAGA
HOSHINO YASUSHI
YAMAMOTO AKINAGA
Application Number:
JP6809689A
Publication Date:
March 04, 1996
Filing Date:
March 20, 1989
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK
International Classes:
H01L27/16; H01L37/02; (IPC1-7): H01L37/02
Other References:
MOS-ICnFET=1969
Attorney, Agent or Firm:
Yoshiki Hasegawa (3 outside)
Next Patent: ATTITUDE, AZIMUTH, AND POSITION MEASURING APPARATUS