Static information storage and retrieval – Read only systems – Fusible
Reexamination Certificate
2006-12-13
2009-12-01
Ho, Hoai V (Department: 2827)
Static information storage and retrieval
Read only systems
Fusible
C365S104000, C365S189160, C365S225700, C326S101000, C326S047000, C326S038000
Reexamination Certificate
active
07626845
ABSTRACT:
In one embodiment, the invention is an integrated circuit (IC) including an OTP memory and conditioning circuitry. The IC receives an externally-generated DC programming voltage signal that the conditioning circuitry transforms into a programming pulse signal for programming the OTP memory. The conditioning circuitry includes: (i) reset protection circuitry for holding the programming pulse signal low if the IC is powering up, (ii) an overvoltage protection circuit for substantially preventing the programming pulse voltage from exceeding predefined boundaries, and (iii) a conversion switch for controlling the programming pulse voltage. The programming pulse voltage is (i) substantially equivalent to the externally-generated DC voltage if an enable signal is on, and (ii) substantially equivalent to a reference voltage if the enable signal is off.
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Holder, Jr. Clinton H.
Lee Kang W.
Simko Joseph E.
Smooha Yehuda
Zhu Ying
Agere Systems Inc.
Hidalgo Fernando N
Ho Hoai V
Meisarosh Edward J.
Mendelsohn Steve
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