NOISE IMMUNITY TEST METHOD FOR COMMUNICATION DEVICE

To detect voltage and current behavior on a transmission line with high accuracy in immunity tests.SOLUTION: A communication device (10) includes: a connector (11) to which external wiring (20) is connected; a communication circuit (14); a signal line (12) for connecting the connector (11) and the c...

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Bibliographische Detailangaben
Hauptverfasser: INOUE TATSUYA, TOKUNAGA HIDEAKI, KATSUMURA SHUNSUKE, KOBAYASHI KEIJI, NOZOE KENJI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To detect voltage and current behavior on a transmission line with high accuracy in immunity tests.SOLUTION: A communication device (10) includes: a connector (11) to which external wiring (20) is connected; a communication circuit (14); a signal line (12) for connecting the connector (11) and the communication circuit (14); an EMC (Electro Magnetic Compatibility) countermeasure component (13) inserted into the signal line (12); and ESD (Electro-Static Discharge) protection elements (15) connected between the signal line (12) and a predetermined fixed potential. An injection step of a noise immunity test method injects a noise current into the external wiring (20) while the communication circuit (14) is communicating with the communication circuit (14) of another communication device (10) via the external wiring (20). A measuring step measures a current flowing through the ESD protection element (15).SELECTED DRAWING: Figure 1 【課題】イミュニティ試験における伝送路上の電圧・電流の挙動を高精度に検知する。【解決手段】通信装置(10)は、外部配線(20)が接続されるコネクタ(11)と、通信回路(14)と、コネクタ(11)と通信回路(14)間を接続する信号線(12)と、信号線(12)に挿入されるEMC(Electro Magnetic Compatibility)対策部品(13)と、信号線(12)と所定の固定電位間に接続されるESD(Electro-Static Discharge)保護素子(15)と、を備える。ノイズ耐性試験方法の注入ステップは、通信回路(14)が外部配線(20)を介して別の通信装置(10)の通信回路(14)と通信している状態で、外部配線(20)にノイズ電流を注入する。測定ステップは、ESD保護素子(15)に流れる電流を測定する。【選択図】図1