JP2009017678A5 - - Google Patents
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- Publication number
- JP2009017678A5 JP2009017678A5 JP2007176466A JP2007176466A JP2009017678A5 JP 2009017678 A5 JP2009017678 A5 JP 2009017678A5 JP 2007176466 A JP2007176466 A JP 2007176466A JP 2007176466 A JP2007176466 A JP 2007176466A JP 2009017678 A5 JP2009017678 A5 JP 2009017678A5
- Authority
- JP
- Japan
- Prior art keywords
- line
- zero
- cross detection
- detection circuit
- switching
- 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
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- 238000001514 detection method Methods 0.000 claims 7
- 238000004804 winding Methods 0.000 claims 2
Claims (3)
トランスの一次側に設けられ、前記第１のラインと第２のラインとの間の電位差に応じて前記トランスの一次巻線に流れる電流をスイッチングするスイッチング手段と、
前記第１のラインと第２のラインとに接続され、前記スイッチング手段のスイッチングに応じてゼロクロス検知信号を出力する出力回路と、
前記トランスの一次側の補助巻線からの電圧を定電圧源として生成する定電圧回路と、を備え、
前記第２のラインに前記定電圧回路を接続したことを特徴とするゼロクロス検知回路。 A zero cross detection circuit for detecting a timing at which the phase of the AC voltage supplied through the first line and the second line becomes zero degrees,
Switching means provided on the primary side of the transformer, for switching a current flowing through the primary winding of the transformer according to a potential difference between the first line and the second line ;
An output circuit connected to the first line and the second line and outputting a zero-cross detection signal in response to switching of the switching means ;
A constant voltage circuit for generating a voltage from the auxiliary winding on the primary side of the transformer as a constant voltage source,
A zero-crossing detection circuit , wherein the constant voltage circuit is connected to the second line .
ゼロクロス検知が不要な場合に、前記オフ手段によってラインとの接続を切ることを特徴とする請求項１に記載のゼロクロス検知回路。 Further comprising said zero-cross detection circuit, the off means to cut the connection between the at least one line of the first line and the second line,
2. The zero- cross detection circuit according to claim 1 , wherein when the zero-cross detection is unnecessary, the connection with the line is disconnected by the off means .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007176466A JP5203643B2 (en) | 2007-07-04 | 2007-07-04 | Zero cross detection circuit, zero cross signal output circuit and power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007176466A JP5203643B2 (en) | 2007-07-04 | 2007-07-04 | Zero cross detection circuit, zero cross signal output circuit and power supply |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2009017678A JP2009017678A (en) | 2009-01-22 |
| JP2009017678A5 true JP2009017678A5 (en) | 2010-08-12 |
| JP5203643B2 JP5203643B2 (en) | 2013-06-05 |
Family
ID=40357898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007176466A Active JP5203643B2 (en) | 2007-07-04 | 2007-07-04 | Zero cross detection circuit, zero cross signal output circuit and power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5203643B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5424663B2 (en) * | 2009-01-30 | 2014-02-26 | キヤノン株式会社 | Power supply device and image forming apparatus |
| JP6566688B2 (en) * | 2015-03-31 | 2019-08-28 | キヤノン株式会社 | Zero-cross detection circuit, power supply device, and image forming apparatus |
| CN109639109A (en) * | 2018-12-18 | 2019-04-16 | 上海南芯半导体科技有限公司 | A kind of control circuit and implementation method for output line resistance compensation in DC-DC |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3430107B2 (en) * | 2000-02-23 | 2003-07-28 | エヌイーシ−カスタムテクニカ株式会社 | Leakage current suppression circuit and power supply device using the same |
| JP3829087B2 (en) * | 2001-11-20 | 2006-10-04 | 三菱電機株式会社 | Power factor correction equipment |
| JP2003199336A (en) * | 2001-12-25 | 2003-07-11 | Sharp Corp | Power supply and image forming device |
| JP3728245B2 (en) * | 2001-12-28 | 2005-12-21 | キヤノン株式会社 | Zero cross detection circuit |
| JP2005304099A (en) * | 2004-04-06 | 2005-10-27 | Canon Inc | Full-wave rectification circuit |
-
2007
- 2007-07-04 JP JP2007176466A patent/JP5203643B2/en active Active
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