Reduced capacitor charge-pump

Details Reduced capacitor charge-pump Reduced capacitor charge-pump

2009-10-16

2011-10-25

Hiltunen, Thomas J (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C363S060000

Reexamination Certificate

active

08044706

ABSTRACT:
Systems and methods to achieve a charge pump for generating from single supply voltage energy efficient supply voltages that are symmetrical around ground voltage have been disclosed. The charge pump requires two flying capacitors only. The charge pump generates positive and negative supply voltages following a 1/N ratio of Vdd voltage, i.e. +−Vdd/N, and can be generalized to generate +/−Vdd/2Nvoltages. This is especially useful for supplying class-G amplifiers.

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Co-pending US Patent DS09-011, U.S. Appl. No. 12/589,021, filed Oct. 16, 2009, “VDD/5 or VDD/6 Charge-Pump,” assigned to the same assignee as the present invention.
European Search Report, 09368045.2-2207, Mail date—Feb. 8, 2011, Dialog Semiconductor GmbH.

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