The invention relates to an isolated high-voltage sampling circuit. The circuit comprises a first processing circuit, a second processing circuit and a feedback circuit. The input end of the first processing circuit serves as a high-voltage voltage sampling end, and the output end of the first processing circuit is connected with the second processing circuit and used for converting and isolatingthe sampled high-voltage voltage and then outputting the high-voltage voltage to the forward input end and the reverse input end of the second processing circuit; the second processing circuit outputsa final sampling voltage after voltage comparison; and the input end of the feedback circuit is connected with the output end of the second processing circuit, and the output end of the feedback circuit is connected with the reverse input end of the second processing circuit and used for feeding back the output voltage of the second processing circuit to the reverse input end of the second processing circuit. The isolated high-voltage sampling circuit has the characteristics of high circuit safety, high sampling precision, certain chip protection measures, high system stability and the like.
本发明涉及一种隔离式高压采样电路,包括第一处理电路、第二处理电路、反馈电路,所述第一处理电路的输入端作为高压电压采样端,所述第一处理电路的输出端连接所述第二处理电路,用于对采样的高压电压进行转换、隔离后,输出到所述第二处理电路的正向输入端及反向输入端;所述第二处理电路经电压比对后,输出最终的采样电压;所述反馈电路的输入端连接所述第二处理电路的输出端、所述反馈电路的输出端连接所述第二处理电路的反向输入端,用于将所述第二处理电路的输出电压反馈到所述第二处理电路的反向输入端。本发明具有电路安全性高、采样精度高、具备一定的芯片保护措施、系统稳定性高等特点。
Isolated high-voltage sampling circuit
一种隔离式高压采样电路
2020-10-27
Patent
Electronic Resource
Chinese
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