Voltage boosted transmitter without a negative rail

A system, comprising:

• a driver including a pull-up p-type field effect transistor (PFET);
• a negative boost circuit comprising:
• a first drive circuit configured to receive a first supply voltage;
• a second drive circuit configured to receive a second supply voltage different from the first supply voltage;
• a switch coupled between an output of the second drive circuit and a gate of the pull-up PFET, wherein the switch comprises a PFET with a gate coupled to a ground and a source coupled to the output of the second drive circuit;
• and
• a capacitor having a first terminal and a second terminal, wherein the first terminal is coupled to the gate of the pull-up PFET and the second terminal is coupled to an output of the first drive circuit;
• and
• a pre-drive circuit configured to drive an input of the first drive circuit and an input of the second drive circuit based on an input signal.

A system, comprising:

• a driver including a pull-up p-type field effect transistor (PFET);
• a negative boost circuit comprising:
• a first drive circuit configured to receive a first supply voltage;
• a second drive circuit configured to receive a second supply voltage different from the first supply voltage;
• a switch coupled between an output of the second drive circuit and a gate of the pull-up PFET, wherein the switch comprises a first PFET and a second PFET coupled in series between the output of the second drive circuit and the gate of the pull-up PFET, a gate of the first PFET is coupled to a ground, and a gate of the second PFET is coupled to the ground;
• and
• a capacitor having a first terminal and a second terminal, wherein the first terminal is coupled to the gate of the pull-up PFET and the second terminal is coupled to an output of the first drive circuit;
• and
• a pre-drive circuit configured to drive an input of the first drive circuit and an input of the second drive circuit based on an input signal.

A system, comprising:

• a driver including a pull-up p-type field effect transistor (PFET);
• a negative boost circuit comprising:
• a first drive circuit configured to receive a first supply voltage;
• a second drive circuit configured to receive a second supply voltage different from the first supply voltage;
• a third drive circuit configured to receive the second supply voltage;
• a capacitor having a first terminal and a second terminal, wherein the first terminal is coupled to a gate of the pull-up PFET;
• a first switch coupled between an output of the second drive circuit and the gate of the pull-up PFET;
• a second switch coupled between an output of the first drive circuit and the second terminal of the capacitor;
• and
• a third switch coupled between an output of the third drive circuit and the second terminal of the capacitor;
• and
• a pre-drive circuit configured to drive an input of the first drive circuit, an input of the second drive circuit, and an input of the third drive circuit based on an input signal.