西安电子科技大学学报（自然科学版）Issue(4)：192-197,6.DOI:10.3969/j.issn.1001-2400.2015.04.032
一种用于以太网供电的高压检测电路
High voltage detection circuit for power over the ethernet
摘要
Abstract
A novel high voltage detection circuit with a high accuracy and low temperature coefficient for Power over the Ethernet ( PoE) application is presented . The proposed detection circuit uses a bandgap comparator to detect the input voltage without an extra comparator and a voltage reference circuit , which reduces the chip area and detection time . In order to overcome the effect of the Ethernet resistor and avoid the circulating change of the detection circuit between the detection state and classification state , the proposed circuit uses a feedback circuit to realize the hysteresis function . The proposed detection circuit is implemented in 0.5 μm 65 V BCD process which occupies an active area of 590 μm × 310 μm . The measured results show that the temperature coefficient of the threshold voltage is 26.5 × 10- 6 / ℃ over the temperature range of - 40 ℃ to 125 ℃ . According to the measured results of 20 chips , the average value of the threshold voltage is 11.9 V ± 0.25 V , with a standard deviation of 0.138 V .关键词
电压检测/温度系数/带隙/以太网供电Key words
voltage detection/temperature coefficient/bandgap/power over ethernet分类
信息技术与安全科学引用本文复制引用
励勇远,朱樟明..一种用于以太网供电的高压检测电路[J].西安电子科技大学学报（自然科学版）,2015,(4):192-197,6.基金项目
国家自然科学基金资助项目 （）
