JPS6168684U - - Google Patents
Info
- Publication number
- JPS6168684U JPS6168684U JP15368884U JP15368884U JPS6168684U JP S6168684 U JPS6168684 U JP S6168684U JP 15368884 U JP15368884 U JP 15368884U JP 15368884 U JP15368884 U JP 15368884U JP S6168684 U JPS6168684 U JP S6168684U
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- voltage
- secondary voltage
- zero
- input terminal
- 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 3
- 238000009499 grossing Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Measurement Of Current Or Voltage (AREA)
- Control Of Voltage And Current In General (AREA)
- Power Conversion In General (AREA)
Description
第1図は本考案の一実施例に係るゼロクロス検
出回路の回路図、第2図aは従来例における高1
次電圧時の動作タイミングを模式的に示すタイミ
ングチヤート、第2図bは従来例における低1次
電圧時の動作タイミングを模式的に示すタイミン
グチヤート、第2図cは前記一実施例の高1次電
圧時の動作タイミングを模式的に示すタイミング
チヤート、第2図dは前記一実施例の低1次電圧
時の動作タイミングを模式的に示すタイミングチ
ヤート、第3図、第4図はそれぞれ異なる従来例
の回路図である。
1……比較器、2……入力トランス、3……抵
抗回路、4……整流回路、5……平滑回路、6…
…分圧回路。
Fig. 1 is a circuit diagram of a zero-cross detection circuit according to an embodiment of the present invention, and Fig. 2a is a circuit diagram of a zero-cross detection circuit according to an embodiment of the present invention.
FIG. 2b is a timing chart schematically showing the operation timing at low primary voltage in the conventional example, and FIG. 2c is a timing chart schematically showing the operation timing at low primary voltage in the above example. FIG. 2d is a timing chart schematically showing the operation timing at low primary voltage of the above embodiment; FIGS. 3 and 4 are different from each other. FIG. 2 is a circuit diagram of a conventional example. 1... Comparator, 2... Input transformer, 3... Resistance circuit, 4... Rectifier circuit, 5... Smoothing circuit, 6...
...Voltage divider circuit.
Claims (1)
スの2次電圧を印加する一方、該比較器の負相入
力端に前記2次電圧を整流平滑した非安定化電圧
を印加し、前記2次電圧が前記非安定化電圧と等
値になるごとに信号値が高低に切換えられるゼロ
クロス信号を上記比較器が出力するように構成し
たゼロクロス検出回路。 A comparator is provided, a secondary voltage of the transformer is applied to the positive phase input terminal of the comparator, and an unstabilized voltage obtained by rectifying and smoothing the secondary voltage is applied to the negative phase input terminal of the comparator, and the A zero-cross detection circuit configured such that the comparator outputs a zero-cross signal whose signal value is switched high or low each time the secondary voltage becomes equal to the unregulated voltage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15368884U JPS6168684U (en) | 1984-10-11 | 1984-10-11 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15368884U JPS6168684U (en) | 1984-10-11 | 1984-10-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6168684U true JPS6168684U (en) | 1986-05-10 |
Family
ID=30711699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15368884U Pending JPS6168684U (en) | 1984-10-11 | 1984-10-11 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6168684U (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019026706A1 (en) * | 2017-07-31 | 2019-02-07 | ローム株式会社 | Zero-crossing detection circuit |
US11733275B2 (en) | 2017-07-31 | 2023-08-22 | Rohm Co., Ltd. | Zero-crossing detection circuit |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829368A (en) * | 1981-08-11 | 1983-02-21 | Matsushita Electric Ind Co Ltd | Phase control circuit |
-
1984
- 1984-10-11 JP JP15368884U patent/JPS6168684U/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5829368A (en) * | 1981-08-11 | 1983-02-21 | Matsushita Electric Ind Co Ltd | Phase control circuit |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019026706A1 (en) * | 2017-07-31 | 2019-02-07 | ローム株式会社 | Zero-crossing detection circuit |
JPWO2019026706A1 (en) * | 2017-07-31 | 2020-07-02 | ローム株式会社 | Zero-cross detection circuit |
US11181562B2 (en) | 2017-07-31 | 2021-11-23 | Rohm Co., Ltd. | Zero-crossing detection circuit |
US11733275B2 (en) | 2017-07-31 | 2023-08-22 | Rohm Co., Ltd. | Zero-crossing detection circuit |
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