Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-08-14
2007-08-14
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S537000
Reexamination Certificate
active
11028392
ABSTRACT:
Protecting the devices of a charge pump includes the connection of a high-voltage transistor between the output node of the charge pump and the load being supplied, and in controlling this transistor with a fraction of the output voltage of the charge pump. This control is accomplished by connecting the control node of the high-voltage transistor to a node of connection between two stages of the multi-stage charge pump onto which a fraction of the controlled output voltage of the multi-stage charge pump is produced. The high-voltage output transistor protects the low voltage devices of the multi-stage charge pump, by preventing the controlled output voltage from undergoing excessively abrupt variations, that could damage the transistors of the last stage of the charge pump.
REFERENCES:
patent: 4839787 (1989-06-01), Kojima et al.
patent: 5898335 (1999-04-01), Miyamoto et al.
patent: 6278315 (2001-08-01), Kim
patent: 6476666 (2002-11-01), Palusa et al.
patent: 2003/0214346 (2003-11-01), Pelliconi
patent: 2005/0093614 (2005-05-01), Lee
Di Mauro Rosa
Maganuco Giuseppe
Palumbo Gaetano
Pappalardo Domenico
Sorrentino Francesco
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Jorgenson Lisa K.
Luu An T.
STMicroelectronics S.r.l.
Wells Kenneth B.
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