Static information storage and retrieval – Read/write circuit – Testing
Patent
1997-08-20
1999-09-07
Nelms, David
Static information storage and retrieval
Read/write circuit
Testing
36518909, 365226, G11C 700
Patent
active
059497254
ABSTRACT:
In an integrated circuit including test circuitry for testing integrated circuit function, a programmable supervoltage circuit is described for enabling the test circuitry. The supervoltage circuit includes a reference circuit, a step-down circuit, a sensing circuit, and an output circuit. The reference circuit produces a reference voltage. The step-down circuit receives an input voltage and produces a stepped-down voltage. The sensing circuit is coupled with the reference and step-down circuits, receives the reference and stepped-down voltages, and produces a sense signal as a function of the relative values of the reference and stepped-down voltages. The output circuit is coupled with the sensing circuit, receives the sense signal, and produces a supervoltage output signal to enable the test circuitry. In a first embodiment, a programmable selection circuit is coupled with and selectively shunts one or more circuit elements in the step-down circuit to adjust the value of the stepped-down voltage relative to the input voltage. In a second embodiment, the selection circuit is coupled with and selectively shunts one or more circuit elements in the reference circuit to adjust the value of the reference voltage. In a third embodiment, the step-down circuit receives the input voltage at a selected one of a plurality of input terminals and produces a corresponding stepped-down voltage.
REFERENCES:
patent: 5363333 (1994-11-01), Tsujimoto
patent: 5448199 (1995-09-01), Park
patent: 5463585 (1995-10-01), Sanada
patent: 5550778 (1996-08-01), Takahashi
patent: 5712575 (1998-01-01), Ma et al.
patent: 5721703 (1998-02-01), Habersetzer et al.
patent: 5745499 (1998-04-01), Ong
patent: 5841714 (1998-11-01), Sher et al.
Le Thong
Micro)n Technology, Inc.
Nelms David
LandOfFree
Method and apparatus for reprogramming a supervoltage circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reprogramming a supervoltage circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reprogramming a supervoltage circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1811033