Low voltage and high driving charge pump

A method of operating a charge pump circuit, comprising:

• providing a supply voltage to a drain of a first diode device, which has a source connected to a drain of a second diode device;
• providing an input clock signal to a first input of a first voltage multiplier circuit;
• providing a second two-phase output signal, which has a maximum value in alternating clock phases that is greater than a supply voltage, from a second voltage multiplier circuit to a second input of the first voltage multiplier circuit;
• providing a first two-phase output signal from an output of the first voltage multiplier circuit to a gate of a transistor having a source coupled to a voltage source configured to provide the supply voltage and a drain coupled to the first diode device, wherein the first two-phase output signal has a maximum voltage in alternating clock phases that is sufficient to form a channel extending between a source of the transistor and a drain of the transistor;
• providing a first input signal to a first input of the second voltage multiplier circuit, wherein the first input signal is equal to an inverted version of the input clock signal;
• and
• providing the first two-phase output signal to a second input of the second voltage multiplier circuit.

A method of operating a charge pump circuit, comprising:

• providing a supply voltage to a first diode device connected to a second diode device;
• providing an input clock signal to a first input of a first voltage multiplier circuit having a diode connected transistor;
• providing a second two-phase output signal, which has a maximum value in alternating clock phases that is greater than a supply voltage, from a second voltage multiplier circuit to a second input of the first voltage multiplier circuit;
• and
• providing a first two-phase output signal from an output of the first voltage multiplier circuit to a gate of a transistor having a source coupled to a voltage source configured to provide the supply voltage and a drain coupled to the first diode device.