초록 ▼

This invention provides a voltage inverting charge pump 20. The charge pump 20 produces an output at node 60 which is twice the magnitude of the inverse of the input voltage applied to node 50. A first set of switches 22, 24, 26, 28 are connected to the pair of pump capacitors 36, 38 and a voltage s

This invention provides a voltage inverting charge pump 20. The charge pump 20 produces an output at node 60 which is twice the magnitude of the inverse of the input voltage applied to node 50. A first set of switches 22, 24, 26, 28 are connected to the pair of pump capacitors 36, 38 and a voltage supply input so as to connect the pump capacitors 36, 38 and the voltage supply input in parallel when the first set of switches 22, 24, 26, 28 is closed. A second set of switches 30, 32, 34 is connected to the pump capacitors 36, 38, a hold capacitor 40, and an output terminal 60 so as to connect the charged pump capacitors 36, 38 in series with the output terminal 60 and in parallel with the hold capacitor 40 when the second set of switches 30, 32, 34 is closed.

대표청구항 ▼

[ We claim:] [1.] A voltage inverting charge pump comprising:a pair of pump capacitors;a hold capacitor;a first group of switches connected to an input terminal, a reference terminal, and both pump capacitors such that the pump capacitors are connected in parallel with each other between the input t

[ We claim:] [1.] A voltage inverting charge pump comprising:a pair of pump capacitors;a hold capacitor;a first group of switches connected to an input terminal, a reference terminal, and both pump capacitors such that the pump capacitors are connected in parallel with each other between the input terminal and the reference terminal when the first group of switches is closed; and,a second group of switches connected to the pair of pump capacitors, the hold capacitor and an output terminal such that the pair of pump capacitors are connected in series with each other between an output terminal and the reference terminal; and the hold capacitor is connected in parallel with the pump capacitors when the second group of switches is closed.