Power-up circuit in semiconductor memory device

Details Power-up circuit in semiconductor memory device Power-up circuit in semiconductor memory device

2006-10-17

2006-10-17

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

07123062

ABSTRACT:
A power-up circuit of a semiconductor memory device includes a power supply voltage level follower unit for providing a bias voltage which is linearly varied according to variation of a power supply voltage, a power supply voltage detection unit for detecting the variation of the power supply voltage to a predetermined critical voltage level in response to the bias voltage, and a reset prevention unit for canceling variation of the detection signal due to a power drop by delaying level transition of the detection signal according to decrease of the power supply voltage.

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