Power up signal generator

Details Power up signal generator Power up signal generator

2006-05-16

2006-05-16

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S142000, C327S198000

Reexamination Certificate

active

07046054

ABSTRACT:
A power up signal generator includes a signal converter for converting an applied external source voltage to a voltage applied at a trigger node when the external source voltage rises to a first threshold, and a current source for flowing a reference current from the trigger node. A first inverter connected to the trigger node outputs a low level signal when the trigger node voltage reaches a second threshold. A second inverter outputs a power up signal after receiving the low level signal from the first inverter. The signal converter may include a PMOS transistor configuration, such that the trip voltage of the power up signal generator is dependent only on a single MOSFET transistor threshold voltage.

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patent: 5983346 (1999-11-01), Wendell
patent: 8256039 (1996-10-01), None

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