Patent ID: 7760010
Filing Date: 2010-07-20
Classification: G11C,H02M

Abstract:
1. A charge pump comprising: first and second switched capacitors each having a first node and a second node; a charging circuit which charges said first node of said first switched capacitor while discharging said first node of said second switched capacitor during a first clock phase and charges said first node of said second switched capacitor while discharging said first node of said first switched capacitor during a second clock phase; first and second cross-coupled transistors each having a gate, a first terminal and a second terminal wherein said first terminal of said first cross-coupled transistor is connected to said second node of said first switched capacitor and to said gate of said second cross-coupled transistor, said first terminal of said second cross-coupled transistor is connected to said second node of said second switched capacitor and to said gate of said first cross-coupled transistor; a pump output connected to said second terminals of said first and second cross-coupled transistor; first and second side transistors each having a gate, a first terminal and a second terminal wherein said first terminal of said first side transistor is connected to said second node of said first switched capacitor, said second terminal of said first side transistor is connected to a first reference voltage, said first terminal of said second side transistor is connected to said second node of said second switched capacitor, and said second terminal of said second side transistor is connected to the first reference voltage; a first gate control circuit which connects said gate of said first side transistor to said pump output during the first clock phase and to a second reference voltage during the second clock phase; and a second gate control circuit which connects said gate of said second side transistor to the second reference voltage during the first clock phase and to said pump output during the second clock phase.