Apparatus comprising a charge pump and LCD driver comprising...

Details Apparatus comprising a charge pump and LCD driver comprising... Apparatus comprising a charge pump and LCD driver comprising...

2005-07-26

2009-10-20

Vo, Tuyet (Department: 2821)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S536000, C327S157000, C327S059000

Reexamination Certificate

active

07605641

ABSTRACT:
Apparatus comprising a charge pump (20) with multiple independently regulated outputs (V1, V2) for providing different voltage levels at each of said outputs. The charge pump (20) comprises a low voltage input (12), on/off regulation (30), and at least two charge stages (11, 21) which arc arranged in a cascaded manner. Each charge stage (11, 21) comprises a stage capacitor (16, 26), a switch (S1, S3), and a buffer (15, 25) for pumping a bottom plate of the stage capacitor (16, 26).

REFERENCES:
patent: 2003/0067429 (2003-04-01), Aoki et al.
patent: 2005/0254271 (2005-11-01), Negoi
patent: WO03090332 (2003-10-01), None

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