Level shifting circuit

A level shifting circuit comprising:

• a discharging means to perform a discharge of a first node and a second node with a complementary input signal using a first voltage source as a power supply;
• and
• a charging means to perform a charge of said first node according to a logical level of said second node and to perform a charge of said second node according to a logical level of said first node by a second voltage source used as a power supply, wherein
• said discharging means is made up of:
• a first N-type transistor and a second N-type transistor whose drains are connected to said first and second nodes respectively, whose gates are respectively connected to said complementary input signal and whose sources are grounded ;
• and
• said charging means is made up of:
• a first P-type transistor and a second P-type transistor whose drains are connected to said first and second nodes respectively, whose gates are connected to said second and first nodes respectively and whose sources are connected to said second voltage source;
• a first switching circuit and a second switching circuit connected in parallel to said first and second P-type transistors respectively, and keeping an OFF state at a stationary state when said input signal does not change;
• and
• a charging regulator circuit which charges said second node to a logic “H” by setting said second switching circuit to an ON state and thereafter brings back said second switching circuit to an OFF state when said first node is changed from a logic “H” to a logic “L” by a change of said input signal, and charges said first node to the logic “H” by setting said fir st switching circuit to the ON state and thereafter brings back said first switching circuit to the OFF state when said second node is changed from the logic “H” to the logic “L” by the change of said input signal.