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1. 发明授权

US08680912B2 Level shifting circuitry 有权
标题翻译：电平转换电路
公开(公告)号：US08680912B2
公开(公告)日：2014-03-25
申请号：US13551012
申请日：2012-07-17
申请人： Brian William Reed
发明人： Brian William Reed
IPC分类号： H03L5/00
CPC分类号： H03K19/018507
摘要： Level shifting circuitry is provided for generating an output signal in response to an input signal. The level shifting circuitry includes a pulldown path for pulling the output signal to a lower output voltage level in response to a first transition of the input signal and a pullup path for pulling the output signal to a higher output voltage level in response to a second transition of the input signal. Pullup control circuitry places the pullup path in a non-conductive state in response to the output signal being pulled to the higher output voltage level. A keeper path keeps the output signal at the higher output voltage level while the pullup path is non-conductive until the pulldown path pulls the output signal low. A maximum drive current of the pulldown path is greater than a maximum drive current of the keeper path.
摘要翻译：电平移位电路用于响应于输入信号产生输出信号。电平移位电路包括用于响应于输入信号的第一跃迁而将输出信号拉到较低输出电压电平的下拉路径，以及用于响应于第二转换将输出信号拉到较高输出电压电平的上拉路径的输入信号。上拉控制电路将上拉路径置于非导通状态，以响应于输出信号被拉至更高的输出电压电平。保持器路径将输出信号保持在较高的输出电压电平，而上拉路径不导通，直到下拉路径将输出信号拉低为止。下拉路径的最大驱动电流大于保持器路径的最大驱动电流。

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