Semiconductor integrated circuit having insulated gate field...

Details Semiconductor integrated circuit having insulated gate field... Semiconductor integrated circuit having insulated gate field...

2011-05-17

2011-05-17

Tan, Vibol (Department: 2819)

Electronic digital logic circuitry

Clocking or synchronizing of logic stages or gates

Field-effect transistor

C327S208000

Reexamination Certificate

active

07944242

ABSTRACT:
A semiconductor integrated circuit includes a multiplexer, a signal generating circuit, a control circuit, m inverters, n two-input NOR circuits, and cascade connected n two-shift registers. The control circuit generates a control signal in the disable state in a normal operation in which the clock signal is supplied. The control circuit generates a control signal in an enable state in the other-than-normal operation in which a higher voltage source voltage is supplied while the clock signal is not supplied. The multiplexer receives the clock signal and a low-frequency signal outputted from the signal generating circuit. The multiplexer supplies the clock signal to the sequence of the inverters upon receipt of the control signal in the disable state, and supplies the low-frequency signal to the sequence of the inverters upon receipt of the control signal in the enable state.

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