Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2005-03-22
2005-03-22
Zweizig, Jeffrey (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
C327S198000
Reexamination Certificate
active
06870408
ABSTRACT:
A power-up circuit comprises a first PMOS transistor connected between the power supply and a first node, wherein a gate terminal of the first PMOS transistor is connected to the ground, a first voltage divider for dividing the power upon a power up, a first NMOS transistor driven an output of the first voltage divider upon a power up and connected between the first node and the ground, an inverter having a plurality of PMOS transistors connected between the power supply and a second node, in which gate electrodes of the plurality of inverter are connected from each other and a second NMOS transistor connected between the second node and the ground and gate of the second NMOS transistor is connected to the plurality of the PMOS transistors, thereby inverting the potential of the first node, and a third NMOS transistor connected between the first node and the ground, wherein the third NMOS transistor is turned on by an output of the inverter, thereby preventing shifting faster than the potential of the first node.
REFERENCES:
patent: 4700089 (1987-10-01), Fujii et al.
patent: 5166546 (1992-11-01), Savignac et al.
patent: 5612641 (1997-03-01), Sali
patent: 5825220 (1998-10-01), Kinugasa et al.
patent: 6410966 (2002-06-01), Takahashi et al.
patent: 6469552 (2002-10-01), Ohbayashi et al.
Hynix / Semiconductor Inc.
Marshall & Gerstein & Borun LLP
Zweizig Jeffrey
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