JPS6447920A - Infrared-ray detector - Google Patents
Infrared-ray detectorInfo
- 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
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.
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)
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 |
-
1987
- 1987-08-19 JP JP20567487A patent/JPS6447920A/en active Pending
Cited By (3)
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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