Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Reexamination Certificate
2005-08-02
2005-08-02
Tra, Quan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
Reexamination Certificate
active
06924679
ABSTRACT:
A power supply voltage control apparatus including an input signal generation circuit of wide uses or a small-sized monitor circuit of a novel configuration, and a semiconductor circuit and a method for driving the same, having a semiconductor circuit11, an input signal generation circuit12able to change the phase difference i of a reference signal outφi and an input signal outφ0in accordance with a control signal Si when generating the two signals from a clock, a monitor circuit13having a characteristic between a power supply voltage and delay the same as that of a critical path of the semiconductor circuit11, propagating the input signal outφ0, and outputting a delayed signal outφ0′ to be delayed exactly by a time equivalent to a delay of the critical path (or smaller by a constant ratio), a delay detection circuit14for detecting a delay of the delayed signal outφ0′ relative to the reference signal outφi, and a power supply voltage control circuit15for controlling a power supply voltage VDDsupplied to the semiconductor device11and the monitor circuit13based on the detection result.
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Supplementary Partial European Search Report dated May 5, 2003.
Hashiguchi Akihiko
Kondo Tetsuo
Seki Takahiro
Seno Katsunori
Kananen Ronald P.
Rader & Fishman & Grauer, PLLC
Tra Quan
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