Patent ID: 6184746
Filing Date: 2001-02-06
Classification: H02M,H03L

Abstract:
A power supply filter comprising:a resistor-capacitor circuit;a switch coupled between the resistor-capacitor circuit and a power supply line, the switch providing power to a target circuit;a charge pump coupled to the resistor-capacitor circuit and coupled to the power supply line, the charge pump keeping the switch in a saturation state;at least one clock line coupled to the charge pump for supplying a clock signal; and wherein said charge pump includesat least one capacitive circuit coupled to at least one of the at least one clock line, the at least one capacitive circuit including:at least two capacitors in series with a middle node located between the at least two capacitors, the middle node coupled to a second power supply line, the second power supply line having approximately half the power supply line voltage.