JPS57189028A - Auto zero photometric circuit - Google Patents
Auto zero photometric circuitInfo
- Publication number
- JPS57189028A JPS57189028A JP7373881A JP7373881A JPS57189028A JP S57189028 A JPS57189028 A JP S57189028A JP 7373881 A JP7373881 A JP 7373881A JP 7373881 A JP7373881 A JP 7373881A JP S57189028 A JPS57189028 A JP S57189028A
- Authority
- JP
- Japan
- Prior art keywords
- offset voltage
- operational amplifier
- amplifier
- output
- optical current
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7373881A JPS57189028A (en) | 1981-05-15 | 1981-05-15 | Auto zero photometric circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7373881A JPS57189028A (en) | 1981-05-15 | 1981-05-15 | Auto zero photometric circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57189028A true JPS57189028A (en) | 1982-11-20 |
JPS632453B2 JPS632453B2 (ja) | 1988-01-19 |
Family
ID=13526872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7373881A Granted JPS57189028A (en) | 1981-05-15 | 1981-05-15 | Auto zero photometric circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57189028A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02186591A (ja) * | 1989-01-13 | 1990-07-20 | Hitachi Ltd | 高周波加熱装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55116226A (en) * | 1979-03-03 | 1980-09-06 | Hitachi Ltd | Discharging current integration-type photodetector |
-
1981
- 1981-05-15 JP JP7373881A patent/JPS57189028A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55116226A (en) * | 1979-03-03 | 1980-09-06 | Hitachi Ltd | Discharging current integration-type photodetector |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02186591A (ja) * | 1989-01-13 | 1990-07-20 | Hitachi Ltd | 高周波加熱装置 |
Also Published As
Publication number | Publication date |
---|---|
JPS632453B2 (ja) | 1988-01-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2560747B2 (ja) | 光電変換装置 | |
JPS5762779A (en) | Alwave rectifying circuit | |
JPS57189028A (en) | Auto zero photometric circuit | |
US4160160A (en) | Circuit for integrating a quantity of light in an automatic control type flash unit | |
ATE27740T1 (de) | Elektronischer elektrizitaetszaehler mit automatischem offsetgroessen-abgleich. | |
JPS56159621A (en) | Photometric circuit | |
JPS56111382A (en) | Solid image pickup apparatus | |
JPS5690272A (en) | Lifetime detector for nonadjusted battery | |
JPS5555267A (en) | Diagnosis device of analog input device | |
SU871132A1 (ru) | Устройство дл автоматического определени экспозиции | |
GB1446392A (en) | Photographic camera with through the lens exposure measurement | |
JPS592513Y2 (ja) | 分光光度計の測光回路 | |
JPS5531939A (en) | Measuring circuit for photo amount | |
SU690426A1 (ru) | Экспонометрическое фотоприемное устройство | |
JPH01163632A (ja) | 測光回路 | |
SU437047A1 (ru) | Усилитель посто нного тока | |
JPS6341410B2 (ja) | ||
JPS5793327A (en) | Electronic shutter integration circuit | |
JPS5785039A (en) | Automatic dimming electronic flash device | |
JPS5582548A (en) | Detection circuit of out of synchronism | |
JPS56153996A (en) | Controlling device for motor | |
JPS57136871A (en) | Solid image pickup device | |
JPS57172473A (en) | Absolute value circuit | |
JPS5755426A (en) | Direct current power supply circuit | |
JPS5771076A (en) | Integration device |