ISOLATOR

• Main Author: UEYAMA KENGO
• Format: Patent
• Language: English; Japanese
• Published: 15.07.2022
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

To provide an isolator capable of avoiding false detection of communications due to noise with a simple configuration.SOLUTION: In an isolator, a primary side pattern 15 for signals and a secondary side pattern 16 for signals are coupled by electromagnetic induction, and a primary side pattern 17 for noise detection and a secondary side pattern 18 for noise detection are coupled by electromagnetic induction. A first voltage-dividing resistor 19 is arranged between a first node ND1 and a third node ND3, and a second voltage-dividing resistor 20 is arranged between the third node ND3 and a second node ND2. A first end J1 of the secondary side pattern 16 for signals and a first input terminal IP1 of a signal receiving circuit 8 are connected via a secondary side circuit 6, and a first end H1 of the secondary side pattern 18 for noise detection and a second input terminal IP2 of the signal receiving circuit 8 are connected via the secondary side circuit 6. When a voltage of the second input terminal IP2 is equal to or more than a threshold voltage, the signal receiving circuit 8 determines that an input signal is an abnormal signal.SELECTED DRAWING: Figure 4 【課題】簡易な構成によって、ノイズによる通信の誤検知を回避することができる絶縁装置を提供する。【解決手段】信号用一次側パターン１５と信号用二次側パターン１６とが電磁誘導によって結合し、ノイズ検知用一次側パターン１７とノイズ検知用二次側パターン１８とが電磁融合によって結合する。第１の分圧抵抗１９は、第１のノードＮＤ１と第３のノードＮＤ３の間に配置され、第２の分圧抵抗２０は、第３のノードＮＤ３と第２のノードＮＤ２との間に配置される。信号用二次側パターン１６の第１端Ｊ１と、信号受信回路８の第１の入力端子ＩＰ１とが二次側回路６を介して接続し、ノイズ検知用二次側パターン１８の第１端Ｈ１と、信号受信回路１８の第２の入力端子ＩＰ２とが二次側回路６を介して接続する。信号受信回路８は、第２の入力端子ＩＰ２の電圧が閾値電圧以上のときに、入力信号が異常信号であると判定する。【選択図】図４