Patent ID: 9178516
Filing Date: 2015-11-03
Classification: H03K

Abstract:
1. A voltage-level shift apparatus comprising: a first level shift unit configured to receive a reference voltage and a power voltage to output a level-shifting voltage; wherein the level-shifting voltage is equal to a sum of the reference voltage and the power voltage; a second level shift unit connected to the first level shift unit and configured to receive the level-shifting voltage; a charging unit configured to receive a control voltage and the level-shifting voltage to provide a required voltage for a charging operation of the charging unit to output an output voltage; and a discharging unit connected to the charging unit and configured to receive the control voltage and the reference voltage; wherein the charging unit is charged by the level-shifting voltage and the level-shifting voltage is the output voltage outputted from the charging unit when the charging unit is turned on and the discharging unit is turned off by the control voltage; the discharging unit is discharged from the output voltage when the charging unit is turned off and the discharging unit is turned on by the control voltage.