Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2005-01-25
2005-01-25
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
Reexamination Certificate
active
06847252
ABSTRACT:
A semiconductor integrated circuit device having a mechanism of compensating not only circuit operational speed but also variations in leakage current, which includes: a main circuit constructed with CMOS device, a delay monitor for simulating a critical path of the main circuit constructed by a CMOS and monitoring a delay of the path, a PN Vt balance compensation circuit for detecting a threshold voltage difference between a PMOS transistor and an NMOS transistor, and a well bias generating circuit for receiving outputs of the delay monitor and the PN Vt balance compensation circuit and applying a well bias to the delay monitor and the main circuit so as to compensate the operation speed of the delay monitor to a desired speed and reduce a threshold voltage difference between the PMOS and NMOS transistors.
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Ishibashi Koichiro
Miyazaki Masayuki
Ono Goichi
A. Marquez, Esq. Juan Carlos
Callahan Timothy P.
Englund Terry L.
Fisher Esq. Stanley P.
Reed Smith LLP
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