Current sampling circuit

• Main Authors: ZHOU LIPING, LI DAZHUANG
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The utility model relates to a current sampling circuit, which comprises a sampling resistor, an amplifying circuit and a voltage conversion circuit, the amplification circuit amplifies the voltage difference between the two ends of the sampling resistor, and then high-end floating current sampling is achieved through the conversion circuit. And the amplifying circuit comprises an instrument amplifier U6 and is used for amplifying the voltage difference between the two ends of the sampling resistor R16. The high-end floating current sampling circuit is high in current sampling precision, small in error, flexible and adjustable in measuring range and large in common-mode voltage range. 本实用新型是一种电流采样电路，包括有采样电阻、放大电路、电压转换电路；放大电路对所述的采样电阻两端的电压差进行放大，再经过转换电路实现高端浮动电流采样；放大电路包括仪表放大器U6，对取样电阻R16两端的电压差进行放大。本实用新型为了实现一种电流采样精度高误差小，量程灵活可调，共模电压范围大的高端浮动电流采样电路。