Charge pump circuit including output terminal-connected pre-charge circuit

A structure comprising:

• an output terminal;
• a charge pump connected to the output terminal;
• and
• a pre-charge circuit including:
• a delay circuit connected to receive a charge pump enable signal, wherein the delay circuit outputs a delayed charge pump enable signal;
• a first section including:
• a pull-up transistor connected to the output terminal;
• a logic circuit connected to receive the charge pump enable signal and the delayed charge pump enable signal, wherein the logic circuit outputs a digital control signal;
• and
• a level shifter connected to receive the digital control signal and an output voltage from the output terminal, wherein the level shifter outputs a gate voltage to a gate of the pull-up transistor, and wherein the gate voltage is variable depending upon the digital control signal and the output voltage;
• and
• a second section including:
• a buffer circuit connected to receive the delayed charge pump enable signal;
• and
• a capacitor connected between the buffer circuit and the output terminal.

A structure comprising:

• an output terminal;
• a charge pump connected to the output terminal;
• a programmable delay circuit connected to receive a charge pump enable signal and trim bits, wherein the programmable delay circuit outputs a delayed charge pump enable signal based on the trim bits;
• and
• a pre-charge circuit including:
• a first section including:
• a pull-up transistor connected to the output terminal;
• a logic circuit connected to receive the charge pump enable signal and the delayed charge pump enable signal, wherein the logic circuit outputs a digital control signal;
• and
• a level shifter connected to receive the digital control signal and an output voltage from the output terminal, wherein the level shifter outputs a gate voltage to a gate of the pull-up transistor, and wherein the gate voltage is variable depending upon the digital control signal and the output voltage;
• and
• a second section including:
• a buffer circuit connected to receive the delayed charge pump enable signal;
• and
• a capacitor connected between the buffer circuit and the output terminal.