Patent ID: 6917239
Filing Date: 2005-07-12
Classification: H02M

Abstract:
1. A level shift circuit for converting a voltage level of an input signal to a predetermined voltage level and generating a level-shifted signal, the level shift circuit comprising: a capacitor having a first electrode connected to a high potential power supply and a second electrode for receiving the input signal; a charge control circuit connected to the first electrode of the capacitor for providing the voltage of the high potential power supply to the capacitor and controlling charging of the capacitor; a first inverter for receiving the voltage of the high potential power supply and generating the level-shifted signal, wherein the first inverter includes a high potential power supply terminal connected to the first electrode of the capacitor and a low potential power supply terminal connected to the second electrode of the capacitor; and a current limiting circuit connected to the charge control circuit for limiting the discharge current of the capacitor.