公开(公告)号：EP2302794A1

公开(公告)日：2011-03-30

申请号：EP09425358.0

申请日：2009-09-18

Applicant: STMicroelectronics Srl

Inventor： Castaldo, Enrico ,  Lo Giudice, Gianbattista ,  Signorello, Alfredo

IPC: H03K3/356 ,  H03K19/0185

CPC classification number: H03K3/35613 ,  H03K19/018528

Abstract: A voltage shifter (20) has a supply line receiving a supply voltage (VH) that varies between a first operating value in a first operating condition and a second high operating value, in a second operating condition. A latch stage (2) is connected to an output branch (6) and to a selection circuit (5), which receives a selection signal (SEL) that controls switching of the latch stage. The latch stage is coupled to the supply line and to a reference potential line (34), which receives a reference voltage (WB) that can vary between a first reference value, when the supply voltage has the first operating value, and a second reference value, higher than the first reference value, when the supply voltage has the second operating value. A uncoupling stage (23) is arranged between the latch stage (2) and the selection circuit (5) and uncouples them in the second operating condition, when the supply voltage and the reference voltage are at their second, high, value.

Abstract translation: 电压移位器（20）具有在第二操作状态下接收在第一操作状态下的第一操作值和第二高操作值之间变化的电源电压（VH）的电源线。 锁存级（2）连接到输出分支（6）和选择电路（5），选择电路（5）接收控制锁存级的切换的选择信号（SEL）。 锁存级耦合到电源线和参考电位线（34），该参考电位线（34）接收参考电压（WB），当电源电压具有第一操作值时，参考电压（WB）可以在第一参考值和第二参考值之间变化 值，高于第一参考值，当电源电压具有第二操作值时。 当电源电压和参考电压处于其第二，高值时，在锁存级（2）和选择电路（5）之间布置有非耦合级（23）并在第二操作状态下使它们断开。