CHARGE PUMP INITIALIZATION DEVICE, INTEGRATED CIRCUIT HAVING CHARGE PUMP INITIALIZATION DEVICE, AND METHOD OF OPERATION

摘要

In an initialization phase of a charge pump, an input signal is supplied to an input electrode of a capacitor of the charge pump and to an initialization device of the charge pump. An initialization signal is supplied to the initialization device of the charge pump. The initialization device supplies an output signal to an output electrode of the capacitor. The output signal has a high level and a low level corresponding to a high level and a low level of the input signal, the input signal and the output signal causing a charge to be accumulated in the capacitor. In a pumping operation phase following the initialization phase, the initialization signal is removed from the initialization device to place the output electrode of the capacitor in a floating state, and a pumping action is performed with the charge accumulated in the capacitor.

主权项

1. An initialization device for a charge pump, the initialization device comprising:
a driving circuit between a first power supply node and a second power supply node, the driving circuit comprising a first node configured to be coupled to an output electrode of a capacitor in the charge pump; and a bias voltage circuit between the first power supply node and the second power supply node, the bias voltage circuit comprising a second node coupled to a control terminal of the driving circuit, wherein in response to a presence of an initialization signal applied to the initialization device,
the bias voltage circuit is configured to output a bias voltage to the control terminal of the driving circuit via the second node, the bias voltage having first and second levels corresponding to first and second levels of an input signal applied to an input electrode of the capacitor, andin response to the first and second levels of the bias voltage, the driving circuit is configured to output at the first node an output signal having first and second levels corresponding to the first and second levels of the input signal.