JPS6447920A - Infrared-ray detector - Google Patents

Infrared-ray detector

Info

Publication number
JPS6447920A
JPS6447920A JP20567487A JP20567487A JPS6447920A JP S6447920 A JPS6447920 A JP S6447920A JP 20567487 A JP20567487 A JP 20567487A JP 20567487 A JP20567487 A JP 20567487A JP S6447920 A JPS6447920 A JP S6447920A
Authority
JP
Japan
Prior art keywords
source
drain
fet
diodes
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP20567487A
Other languages
Japanese (ja)
Inventor
Takeo Ishigaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP20567487A priority Critical patent/JPS6447920A/en
Publication of JPS6447920A publication Critical patent/JPS6447920A/en
Pending legal-status Critical Current

Links

Landscapes

  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Radiation Pyrometers (AREA)

Abstract

PURPOSE:To make it possible to prevent the application of a reverse electric field on a pyroelectric element, by connecting nonlinear elements between the drain and the source and between the source and the drain of a FET after impedance conversion in the pyroelectric element. CONSTITUTION:A resistor 10 of about 10-100kOMEGA is connected between a source 6 of a FET 4 and a case (grounding terminal) 7 after impedance conversion. Diodes 8 and 9 as nonlinear elements are connected between a drain 5 and the case 7 and between the source 6 and the case 7. The case 7 is directed in the forward direction for both parts. When a positive (negative) over voltage is applied on the source 6 and the drain 5, short-circuit state occurs in the reverse (forward) direction characteristics of the diodes 8 and 9. The voltage is not applied on the FET 4 and a pyroelectric element 1. Therefore, the element 1 is protected. At the time of normal operation, the capacitance formed in the diodes 8 and 9 is offset with the capacitance formed in parts between the gate and the source 6 and between the gate and the drain 5 of the FET 4. Since short circuit occurs with the output resistor 10 in the impedance value a similar state, wherein the diodes 8 and 9 are not present, is obtained.
JP20567487A 1987-08-19 1987-08-19 Infrared-ray detector Pending JPS6447920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20567487A JPS6447920A (en) 1987-08-19 1987-08-19 Infrared-ray detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20567487A JPS6447920A (en) 1987-08-19 1987-08-19 Infrared-ray detector

Publications (1)

Publication Number Publication Date
JPS6447920A true JPS6447920A (en) 1989-02-22

Family

ID=16510816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20567487A Pending JPS6447920A (en) 1987-08-19 1987-08-19 Infrared-ray detector

Country Status (1)

Country Link
JP (1) JPS6447920A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999044020A1 (en) * 1998-02-27 1999-09-02 C & K Systems, Inc. Pyroelectric detector feedback amplifier low frequency response
US6340816B1 (en) 1998-02-27 2002-01-22 Honeywell International, Inc. Pyroelectric detector with feedback amplifier for enhanced low frequency response
US10809130B2 (en) 2016-11-14 2020-10-20 Murata Manufacturing Co., Ltd. Infrared detection circuit and infrared sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999044020A1 (en) * 1998-02-27 1999-09-02 C & K Systems, Inc. Pyroelectric detector feedback amplifier low frequency response
US6340816B1 (en) 1998-02-27 2002-01-22 Honeywell International, Inc. Pyroelectric detector with feedback amplifier for enhanced low frequency response
US10809130B2 (en) 2016-11-14 2020-10-20 Murata Manufacturing Co., Ltd. Infrared detection circuit and infrared sensor

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