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1. 发明授权

US09577512B2 Current zero-cross detection device, signal acquisition circuit, and circuit system 有权
标题翻译：目前的零交叉检测装置，信号采集电路和电路系统
公开(公告)号：US09577512B2
公开(公告)日：2017-02-21
申请号：US14896668
申请日：2014-04-25
申请人： ZTE CORPORATION
发明人： Jing Wang , Junming Zhang , Jie Fan , Jianping Zhou
IPC分类号： H02M1/42 , G01R19/175 , H02M7/219 , H02M1/00
CPC分类号： H02M1/42 , G01R19/175 , H02M1/4233 , H02M7/219 , H02M2001/0009 , Y02B70/126 , Y02P80/112
摘要： Disclosed are a current zero-cross detection device, zero-cross current signal acquisition circuit and totem pole bridgeless circuit system. The current zero-cross detection device includes a current transformer, first sampling switch, second sampling switch, sampling resister, comparator. The current transformer includes a primary winding and a secondary winding; the primary winding is connected to a circuit to be detected; two ends of the secondary winding are connected respectively to drain electrodes of the first and second sampling switches; source electrodes of first and second sampling switches are connected to ground; two ends of the sampling resistor are connected respectively to the drain electrode and source electrode of the second sampling switch; the negative input end of the comparator is connected to the drain electrode of the second sampling switch, its positive input end is connected to a reference voltage; the first and second sampling switches are in ON or OFF state.
摘要翻译：公开了目前的零交叉检测装置，零交叉电流信号采集电路和图腾柱无桥电路系统。目前的零交叉检测装置包括电流互感器，第一采样开关，第二采样开关，采样电阻，比较器。电流互感器包括初级绕组和次级绕组; 初级绕组连接到要检测的电路; 次级绕组的两端分别连接到第一和第二采样开关的漏电极; 第一和第二采样开关的源电极连接到地; 采样电阻的两端分别连接到第二采样开关的漏电极和源极; 比较器的负输入端连接到第二采样开关的漏电极，其正输入端连接到参考电压; 第一和第二采样开关处于ON或OFF状态。

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