Patent ID: 7276958

Claim:
A voltage supply circuit comprising: a first diode with its anode connected to a voltage supply terminal; a first capacitor connected between the cathode of said first diode and a first node; a first controllable constant current source that is connected between the voltage supply terminal and said first node and supplies a first current to said first node corresponding to a first clock signal; a second controllable constant current source that is connected between said first node and ground potential, and supplies a second current to said first node corresponding to a second clock signal that is complementary to said first clock signal; a second diode connected to the cathode of said first diode; a second capacitor connected between the cathode of said second diode and a second node; a third controllable constant current source that is connected between the voltage supply terminal and said second node, and supplies a third current to said second node corresponding to said second clock signal; and a fourth controllable constant current source that is connected between said second node and the ground potential, and supplies a fourth current to said second node corresponding to said first clock signal.