公开(公告)号：US08854106B2

公开(公告)日：2014-10-07

申请号：US13925032

申请日：2013-06-24

Applicant: STMicroelectronics R&D (Shanghai) Co. Ltd.

Inventor： Fei Wang ,  Snow Qi ,  Jackson Ding

IPC: H03K5/00 ,  H03K19/0185

CPC classification number: H03K19/018514

Abstract: A level shifting circuit includes a current mirror that generates a first bias current and a second bias current (proportional to the first bias current with a first ratio). A first level shifter is coupled between a first input node (receiving a first input signal) and a first output node coupled to an input of the current mirror. The first level shifter applies a first voltage variation to the first input signal in response to the first bias current. A second level is coupled between a second input node (receiving a second input signal) and a second output node coupled to an output of the current mirror. The second level shifter applies a second voltage variation (associated with the first voltage variation) to the second input signal in response to the second bias current.

Abstract translation: 电平移位电路包括产生第一偏置电流的电流镜和与第一偏置电流成比例的第二偏置电流。 第一电平移位器耦合在第一输入节点（接收第一输入信号）和耦合到当前反射镜的输入端的第一输出节点之间。 第一电平移位器响应于第一偏置电流向第一输入信号施加第一电压变化。 第二级耦合在第二输入节点（接收第二输入信号）和耦合到当前反射镜的输出端的第二输出节点之间。 第二电平移位器响应于第二偏置电流而将第二电压变化（与第一电压变化相关联）施加到第二输入信号。