Circuit for detecting pin suspension state

• Main Authors: LUO XUCHENG, HU JIANWEI, CHENG JIANTAO
• Format: Patent
• Language: Chinese; English
• Published: 18.01.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides a circuit for detecting a pin suspension state. The circuit comprises a detection unit connected with a to-be-detected pin and used for detecting resistances of the to-be-detected pin under the states of connecting a power supply and grounding; a judging unit connected with the detection unit and used for comparing the resistance of the to-be-detected pin under the state ofconnecting the power supply with the first predetermined threshold to obtain a first comparison result, and comparing resistance of the to-be-detected pin under the state of grounding with the secondpredetermined threshold to obtain a second comparison result. Whether the pin is suspended can be detected through the circuit provided by the invention. 本发明提供种检测引脚悬空状态的电路，包括：与待测引脚相连的检测单元，用于检测所述待测引脚在接入电源和接地状态下的阻值；与所述检测单元相连的判断单元，用于比较所述待测引脚在接入电源状态的阻值和第预定阈值，得到第比较结果；以及比较所述待测引脚在接地状态下的阻值和第二预定阈值，得到第二比较结果。通过上述公开的电路可以检测出引脚是否悬空。