Circuit configuration for producing negative voltages, charge pump having at least two circuit configurations and method of operating a charge pump

摘要

A circuit configuration for producing negative voltages includes a first transistor having a first connection connected to an input connection, a second connection connected to an output connection of the circuit configuration and a gate connection connected through a first capacitor to a first clock signal connection. A second transistor has a first connection connected to the gate connection of the first transistor, a second connection connected to the second connection of the first transistor and a gate connection connected to the first connection of the first transistor. A second capacitor has a first connection connected to the second connection of the first transistor and a second connection connected to a second clock signal connection. The transistors are MOS transistors produced in a triple well. A third transistor has a first connection connected to the second connection of the first transistor, a second connection connected to the well(s) containing the transistors and a gate connection connected to the first connection of the first transistor. A charge pump having at least two of the circuit configurations and a method of operating the charge pump are also provided.