Power-on reset circuit

Details Power-on reset circuit Power-on reset circuit

2007-09-25

2007-09-25

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S198000

Reexamination Certificate

active

11161260

ABSTRACT:
A power-on reset circuit is provided. The power-on reset circuit includes an adjusting circuit, a charging/discharging unit and an output circuit. The adjusting circuit receives and adjusts a clock signal so as to output a control signal, wherein a minimum level of the control signal is clamped to be higher than a pre-defined level. The charging/discharging unit having a capacitor apparatus receives the control signal, determines whether to charge/discharge the capacitor apparatus based on the control signal, and outputs a storage voltage of the capacitor apparatus. The output circuit receives the storage voltage and outputs the reset signal. Wherein, the adjusting circuit determines the charging/discharging duty cycle of the charging/discharging unit by adjusting the waveform and the minimum level of the control signal. The output circuit enables/disables the reset signal according to whether the storage voltage reaches the threshold voltage of the output circuit.

REFERENCES:
patent: 5386152 (1995-01-01), Naraki
patent: 6388479 (2002-05-01), Gupta et al.
patent: 6650155 (2003-11-01), Nguyen et al.
patent: 6784705 (2004-08-01), Kamata
patent: 6911852 (2005-06-01), Matsushita
patent: 6972602 (2005-12-01), Akamatsu et al.
patent: 6982577 (2006-01-01), Sekino et al.
patent: 2001/0028263 (2001-10-01), Ohbayashi et al.

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