Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2011-08-02
2011-08-02
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S198000
Reexamination Certificate
active
07990189
ABSTRACT:
A power-up signal generating circuit includes a detecting unit configured to output a bias signal having a voltage level corresponding to an external power voltage in response to an internal voltage and a deep power down (DPD) signal; and a signal generating unit configured to generate a power-up signal having a logic level corresponding to the voltage level of the external power voltage in response to the DPD signal and the bias signal, wherein the internal voltage increases during an activation time of the power-up signal to reach a predetermined voltage level after a predetermined time, and maintains a ground voltage level during an inactivation period of the power-up signal.
REFERENCES:
patent: 6784705 (2004-08-01), Kamata
patent: 7606105 (2009-10-01), Chu
patent: 2007/0070772 (2007-03-01), Song et al.
patent: 2008/0309407 (2008-12-01), Nakamura et al.
patent: 1020030027198 (2003-04-01), None
patent: 1020030052362 (2003-06-01), None
Notice of Allowance issued from Korean Intellectual Property Office on Mar. 29, 2010.
Donovan Lincoln
Hynix / Semiconductor Inc.
IP & T Group LLP
Rojas Daniel
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