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1. 发明申请

US20130002461A1 SAMPLE AND HOLD CIRCUIT AND THE METHOD THEREOF 有权
标题翻译：采样和保持电路及其方法
公开(公告)号：US20130002461A1
公开(公告)日：2013-01-03
申请号：US13538940
申请日：2012-06-29
申请人： Yike Li , Xiaoyu Xi , Fei Wang , Zhengxin Li
发明人： Yike Li , Xiaoyu Xi , Fei Wang , Zhengxin Li
IPC分类号： H03M1/00
CPC分类号： H03K5/1532
摘要： A sample and hold circuit and the method thereof are disclosed. The sample and hold circuit may be applied in voltage regulators or other circuits. The sample and hold circuit comprises: an input terminal configured to receive an input signal; an output terminal configured to provide an output signal; a control circuit configured to receive the input signal and the output signal, and wherein based on the input signal and the output signal, the control circuit generates a digital signal, and wherein the digital signal increases when the output signal is lower than the input signal, and maintains when the output signal is larger than or equal to the input signal; a digital-to-analog converter (DAC) configured to convert the digital signal to the output signal.
摘要翻译：公开了采样保持电路及其方法。采样保持电路可以应用在电压调节器或其他电路中。采样和保持电路包括：输入端，被配置为接收输入信号; 输出端子，被配置为提供输出信号; 控制电路，被配置为接收所述输入信号和所述输出信号，并且其中基于所述输入信号和所述输出信号，所述控制电路产生数字信号，并且其中当所述输出信号低于所述输入信号时，所述数字信号增加并且当输出信号大于或等于输入信号时保持; 配置为将数字信号转换为输出信号的数模转换器（DAC）。

2. 发明申请

US20110038698A1 Motor driven ladder rack system 审中-公开
标题翻译：电机驱动梯架系统
公开(公告)号：US20110038698A1
公开(公告)日：2011-02-17
申请号：US12583175
申请日：2009-08-17
申请人： Zhengxin Li
发明人： Zhengxin Li
IPC分类号： B60P1/32 , B60P1/34
CPC分类号： B60P3/14 , B60R9/0423 , B60R9/045
摘要： In order to save physical power and avoid using manual operative mechanism for unload/reload ladders from/onto a vehicle roof, a electric motor driven ladder rack system has been designed which includes: a fixed guide which is mounted on a vehicle roof; a pivotal guide that is pivotally coupled to the fixed guide; a driving box and a sliding ladder rack which is linked to the driving box by chain and engaged with the pivotal guide. Under acting force of motor and gravity the ladder rack moves sliding backward and pivoting downward from the horizontal position on the vehicle roof to a generally vertical position behind the vehicle at which the ladders can be unloaded/loaded. In an opposite process the ladder rack is pulled back on the vehicle roof. In these processes there is no physical power needed at all.
摘要翻译：为了节省物理力量，避免使用手动操作机构，从车顶卸载/重载梯子，设计了电动机驱动梯架系统，其包括：安装在车顶上的固定导轨; 可枢转地联接到固定引导件的枢转引导件; 驱动箱和滑梯，其通过链条与驱动箱连接并与枢转导向件接合。在电机和重力的作用力下，梯架向后滑动，从车顶的水平位置向下滑动到车辆后方的大致垂直位置，梯子可以卸载/装载。在相反的过程中，梯架被拉回车顶。在这些过程中，根本没有物理力量。

3. 发明申请

US20120263561A1 Hydraulic driven ladder rack system 审中-公开
标题翻译：液压驱动梯架系统
公开(公告)号：US20120263561A1
公开(公告)日：2012-10-18
申请号：US13088588
申请日：2011-04-18
申请人： Zhengxin Li
发明人： Zhengxin Li
IPC分类号： B60P1/32 , B60R9/042
CPC分类号： B60R9/0423
摘要： In order to unload/reload ladders from/onto a vehicle's roof without physical power needed, a hydraulic driven ladder rack system has been designed which includes: a chassis mounted on vehicle's roof; a hydraulic driver and a pivotal arm are pivotally coupled on front and rear end of chassis separately. a movable ladder rack engaged with two rolls which installed on top of rear ladder rack supporter; pivotal arm pivotally coupled to front area of ladder rack, hydraulic shaft pivotally coupled to middle of pivotal arm. When hydraulic shaft push out, pivotal arm pivots up and push ladder rack moving upward and backward, until ladder rack arrived generally vertical position in back of vehicle. At this position ladders unload/reload, from/onto ladder rack. When hydraulic shaft draw back, pivotal arm pulls back ladder rack to horizontal position on vehicle's roof. These operations are completed automatically.
摘要翻译：为了在没有物理力量的情况下从车顶卸载/重新载入梯子，设计了一种液压驱动梯架系统，其包括：安装在车顶上的底盘; 液压驱动器和枢转臂分别枢转地联接在底盘的前端和后端。一个可移动的梯架与两个安装在后梯架支架顶部的辊子相接合; 枢转臂枢转地连接到梯架的前部区域，液压轴枢转地连接到枢转臂的中间。当液压轴推出时，枢转臂枢转并将梯架向上和向后移动，直到梯架到达车辆后方的大致垂直位置。在这个位置梯子卸载/重新加载，从/到梯架。当液压轴拉回时，枢转臂将梯架拉回到车顶的水平位置。这些操作自动完成。

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