Start-up circuit

Details Start-up circuit Start-up circuit

Filed on

2005-06-28

Date issued

2005-06-28

Examiner

Le, Dinh T. (Department: 2816)

Patent Class

Miscellaneous active electrical nonlinear devices, circuits, and

SubClass

Signal converting, shaping, or generating

SubSubClass

Synchronizing

Other Related Categories

C327S198000

Type

Reexamination Certificate

Status

active

Patent number

06911852

Description

ABSTRACT:
A start-up circuit includes a power supply node which receives a power supply voltage, a ground node which receives a ground voltage, a first node, a first capacitor which is coupled between the first node and the ground node, a supply circuit which is coupled between the power supply node and the first node, and which supplies an electrical charge from the power supply node to the first capacitor, a discharge circuit which is coupled between the first node and the ground node, and which discharges an electrical charge stored in the first capacitor to the ground node, and an output circuit which is connected to the first node, and which outputs a start-up signal when a voltage level of the first node becomes higher than a set voltage level.

REFERENCES:
patent: 4009399 (1977-02-01), Hofer
patent: 5892381 (1999-04-01), Koifman et al.
patent: 6285223 (2001-09-01), Smith
patent: 6597215 (2003-07-01), Wang
patent: 6693471 (2004-02-01), Matsushita

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