Circuit configurations and methods for manufacturing...

Details Circuit configurations and methods for manufacturing... Circuit configurations and methods for manufacturing...

2006-10-28

2009-02-10

Auduong, Gene N. (Department: 2827)

Static information storage and retrieval

Read only systems

Fusible

C365S105000, C365S230060

Reexamination Certificate

active

07489535

ABSTRACT:
This invention discloses a circuit trimming system that includes a one-time programmable memory (OTP). The OTP further includes a forward biased trim device connected between a voltage supply Vcc and a ground voltage wherein the Vcc having a reduced voltage substantially lower than a trimming voltage for a reversed biased device at ten volts or higher. The OTP further includes a drive circuit provided to select the OTP at a low current operating condition and for turning on a high trim current through the forward biased trim device for trimming and programming the OTP. The trimming system further includes a sense circuit connected across the forward biased trim device is for sensing a current and voltage of the forward biased trim device.

REFERENCES:
patent: 3442206 (1969-05-01), Sugimoto
patent: 3453524 (1969-07-01), Dinger
patent: 3694669 (1972-09-01), Witt et al.
patent: 5610552 (1997-03-01), Schlesinger et al.
patent: 6330204 (2001-12-01), Miyagi

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