Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2008-03-25
2008-03-25
Richards, N. Drew (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S198000
Reexamination Certificate
active
07348817
ABSTRACT:
Disclosed is an improved circuit and method for generating a power on reset signal, the circuit being a two-stage circuit comprising a delay-stage circuit and an output-stage circuit. The delay-stage circuit delays a time for a power on reset signal generated in the output-stage circuit changing from low to high, so that a power voltage having a low rising speed may be normally reset. Further, the two stages provide charging paths and discharging paths so that the power on reset signal may be prevented from changing from high to low when it has changed from low to high, when noises are presented on the power voltage.
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Chen Yu-Ren
Laio Chun-Yao
Hiltunen Thomas J
Holtek Semiconductor Inc.
Richards N. Drew
Volpe and Koenig PC
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