Patent ID: 7436241

Claim:
A charge pump comprising: an input end for receiving an input voltage; an output end for outputting an amplified output voltage; a first level shifter for receiving a first clock signal and a second clock signal respectively at a first input end and a second input end, enhancing levels of the first and second clock signals, and outputting a corresponding first control signal and a second control signal respectively at a first output end and a second output end, the first level shifter comprising: a first switch comprising: a control end coupled to the first input end of the first level shifter; a first end; and a second end coupled to the first output end of the first level shifter; a second switch comprising: a control end coupled to the second input end of the first level shifter; a first end coupled to the first end of the first switch; and a second end coupled to the second output end of the first level shifter; a third switch comprising: a control end coupled to the second output end of the first level shifter; a first end coupled to the output end of the charge pump; and a second end coupled to the first output end of the first level shifter; a fourth switch comprising: a control end coupled to the first output end of the first level shifter; a first end coupled to the output end of the charge pump; and a second end coupled to the second output end of the first level shifter; a first capacitor coupled between the first input end and the second output end of the first level shifter; and a second capacitor coupled between the second input end and the first output end of the first level shifter; and a first charge exchange control switching circuit including an input end and an output end respectively coupled to the input end and the output end of the charge pump for receiving the input voltage, enhancing a level of the input voltage based on the first and second control signals, and outputting the corresponding output voltage, the first charge exchange control switching circuit comprising: a fifth switch comprising: a control end coupled to the first output end of the first level shifter; a first end coupled to the first input end of the first level shifter; and a second end coupled to the input end of the charge pump; a sixth switch comprising: a control end coupled to the second output end of the first level shifter; a first end coupled to the second input end of the first level shifter; and a second end coupled to the input end of the charge pump; a seventh switch comprising: a control end coupled to the first output end of the first level shifter; a first end coupled to the output end of the charge pump; and a second end coupled to the first input end of the first level shifter; and an eighth switch comprising: a control end coupled to the second output end of the first level shifter; a first end coupled to the second input end of the first level shifter; and a second end coupled to the output end of the charge pump.