JPH03109178U - - Google Patents
Info
- Publication number
- JPH03109178U JPH03109178U JP1861990U JP1861990U JPH03109178U JP H03109178 U JPH03109178 U JP H03109178U JP 1861990 U JP1861990 U JP 1861990U JP 1861990 U JP1861990 U JP 1861990U JP H03109178 U JPH03109178 U JP H03109178U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- constant voltage
- analog
- battery
- power supply
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 8
- 239000003990 capacitor Substances 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Exposure Control For Cameras (AREA)
Description
第１図は本考案のカメラの電源電圧検出回路の
一実施例を示す構成図、第２図は本実施例の電池
電圧とＡ／Ｄ変換部のリフアレンス電圧、入力電
圧との関係を示す説明図、第３図は本実施例の電
池電圧とＡ／Ｄ変換部の出力ビツトとの関係を示
す説明図、第４図は従来のカメラの電源電圧検出
回路を示す構成図、第５図は第４図の回路の電池
電圧とＡ／Ｄ変換部のリフアレンス電圧、入力電
圧との関係を示す説明図、第６図は第４図の回路
の電池電圧とＡ／Ｄ変換部の出力ビツトとの関係
を示す説明図、第７図は従来の他のカメラの電源
電圧検出回路を示す構成図、第８図は第７図の回
路の電池電圧とＡ／Ｄ変換部のリフアレンス電圧
、入力電圧との関係を示す説明図、第９図は第７
図の回路の電池電圧とＡ／Ｄ変換部の出力ビツト
との関係を示す説明図である。
１……電池、２……システム制御用回路（ＣＰ
Ｕ）、２ａ……アナログ／デジタル（Ａ／Ｄ）変
換部、３……定電圧回路、４……リフアレンス電
圧入力部、５……バツクアツプ用コンデンサ、６
……分圧回路、７……入力部、８……逆流防止ダ
イオード、９……定電圧素子。
Fig. 1 is a configuration diagram showing one embodiment of the camera power supply voltage detection circuit of the present invention, and Fig. 2 is an explanation showing the relationship between the battery voltage, the reference voltage of the A/D converter, and the input voltage of the present embodiment. 3 is an explanatory diagram showing the relationship between the battery voltage and the output bit of the A/D converter in this embodiment, FIG. 4 is a configuration diagram showing the power supply voltage detection circuit of a conventional camera, and FIG. An explanatory diagram showing the relationship between the battery voltage of the circuit shown in Fig. 4, the reference voltage of the A/D converter, and the input voltage, and Fig. 6 shows the relationship between the battery voltage of the circuit shown in Fig. 4 and the output bit of the A/D converter. 7 is a configuration diagram showing the power supply voltage detection circuit of another conventional camera. FIG. 8 is an explanatory diagram showing the relationship between the battery voltage, the reference voltage of the A/D converter, and the input voltage of the circuit in FIG. 7. An explanatory diagram showing the relationship between
FIG. 3 is an explanatory diagram showing the relationship between the battery voltage of the circuit shown in the figure and the output bit of the A/D converter. 1... Battery, 2... System control circuit (CP
U), 2a... Analog/digital (A/D) converter, 3... Constant voltage circuit, 4... Reference voltage input section, 5... Backup capacitor, 6
... Voltage divider circuit, 7 ... Input section, 8 ... Backflow prevention diode, 9 ... Constant voltage element.
Claims (1)
路を電源とし、かつバツテリーチエツク用のアナ
ログ／デジタル変換部を有するシステム制御用回
路とを備えたカメラの電源電圧検出回路において
、前記電池と前記アナログ／デジタル変換部の入
力部とを定電圧素子を介して接続し、さらに前記
定電圧回路とアナログ／デジタル変換部のリフア
レンス電圧入力部とを接続したことを特徴とする
カメラの電源電圧検出回路。 A power supply voltage detection circuit for a camera comprising a constant voltage circuit connected to a battery, and a system control circuit using the constant voltage circuit as a power source and having an analog/digital converter for battery checking. A power supply voltage detection circuit for a camera, characterized in that an input section of an analog/digital conversion section is connected via a constant voltage element, and the constant voltage circuit is further connected to a reference voltage input section of the analog/digital conversion section. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1861990U JPH03109178U (en) | 1990-02-26 | 1990-02-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1861990U JPH03109178U (en) | 1990-02-26 | 1990-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03109178U true JPH03109178U (en) | 1991-11-08 |
Family
ID=31521772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1861990U Pending JPH03109178U (en) | 1990-02-26 | 1990-02-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03109178U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101027241B1 (en) * | 2010-10-19 | 2011-04-06 | 이상미 | Cutting angle control type timber cutting equipment |
| JP2015064231A (en) * | 2013-09-24 | 2015-04-09 | 株式会社オートネットワーク技術研究所 | Low voltage determination circuit |
-
1990
- 1990-02-26 JP JP1861990U patent/JPH03109178U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101027241B1 (en) * | 2010-10-19 | 2011-04-06 | 이상미 | Cutting angle control type timber cutting equipment |
| JP2015064231A (en) * | 2013-09-24 | 2015-04-09 | 株式会社オートネットワーク技術研究所 | Low voltage determination circuit |