一种电源电压检测电路及其应用

• Format: Patent
• Language: Chinese
• Published: 26.04.2024
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

本发明公开了一种电源电压检测电路，由以下部分组成：电源Vdd，所述电源Vdd的电压检测阈值和带隙电压一样对温度不敏感；主高带宽开环系统电路，所述主高带宽开环系统电路与所述电源Vdd连接；以及电压比较器，所述电压比较器与所述主高带宽开环系统电路连接；所述电压比较器设有反相器；其中，所述电源Vdd向所述主高带宽开环系统电路供电，电流从所述主高带宽开环系统电路流经所述电压比较器，经过所述电压比较器中的所述反相器，电源电压检测输出从所述反相器测量输出。本发明达到了提高检测电压阈值的精度、消除阈值对温度的敏感性、提高对电源电压的变化响应速度以及电路简单的技术效果。 The invention discloses a power supply voltage detection circuit which is composed of the following parts: a power supply Vdd, the voltage detection threshold of which is the same as the band gap voltage and is not sensitive to temperature; a main high-bandwidth open-loop system circuit, wherein the main high-bandwidth open-loop system circuit is connected with the power supply Vdd; and a voltage comparator, wherein the voltage comparator is connected with the main high-bandwidth open-loop system circuit. The voltage comparator is provided with a phase inverter, wherein the power supply Vdd supplies power to the main high-bandwidth open-loop system circuit, current flows through the voltage comparator from the main high-bandwidth ope