Charge pump with speed control

Details Charge pump with speed control Charge pump with speed control

2007-12-04

2007-12-04

Lam, Tuan T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S525000, C327S536000

Reexamination Certificate

active

11533023

ABSTRACT:
A charge pump circuit includes a test mode control unit for generating a plurality of control signals according to a test mode enable signal and an input signal and fixing one of the plurality of the control signals depending upon whether a fuse has been cut or not, a ring oscillator for outputting an output frequency of which varies according to an output of the test mode control unit, and a charge pump for generating a high voltage, which is higher than an external voltage, according to an output of the ring oscillator.

REFERENCES:
patent: 5553030 (1996-09-01), Tedrow et al.
patent: 5952872 (1999-09-01), Hur
patent: 5999009 (1999-12-01), Mitsui
patent: 6100748 (2000-08-01), Oh
patent: 6288602 (2001-09-01), Hoffman
patent: 6300839 (2001-10-01), Bazargan et al.
patent: 6486727 (2002-11-01), Kwong
patent: 6597235 (2003-07-01), Choi
patent: 6741118 (2004-05-01), Uchikoba et al.
patent: 7016248 (2006-03-01), Park et al.

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