Patent ID: 8179192
Filing Date: 2012-05-15
Classification: H03F

Abstract:
1. A signal processor comprising a reference voltage circuit for imposing a reference voltage onto a capacitance, the reference voltage circuit comprising: a negative slope module for providing a negative slope signal (SN) having a magnitude that decreases when a voltage that is present on the capacitance increases; a positive slope module for providing a positive slope signal having a magnitude that increases when the voltage that is present on the capacitance increases; a minimum selection module for controlling a maximum current that the reference voltage circuit can apply to the capacitance substantially in dependence on the negative slope signal, if the magnitude of the negative slope signal is smaller than that of the positive slope signal, and for controlling the maximum current substantially in dependence on the positive slope signal, if the magnitude of the positive slope signal is smaller than that of the negative slope signal.