Patent ID: 8294497

Claim:
A charge pump circuit, comprising: a first pair of transistors, having sources connected together and respective gates to receive a respective one of a first pump signal and an inverse first pump signal; a second pair of transistors, having drains connected together and respective gates to receive a respective one of a second pump signal and an inverse second pump signal, the second pair of transistors being connected to the first pair of transistors at first and second connection nodes; a voltage stabilizer circuit, connected to the second connection node to regulate the second connection node to have a voltage within a predetermined range about a selectable voltage, the voltage stabilizer including a transconductance amplifier having a transistor with a gate connected to the second connection node and a drain connected to a current source, the current source producing a current to regulate a voltage at the transistor gate to fall within the predetermined range about the selectable voltage; and a voltage amplifier, arranged in a negative feedback configuration, having first and second inputs connected to the first and second connection nodes and an output connected to the first connection node, to regulate the voltage at the first connection node to track the voltage at the second connection node.