Semiconductor integrated circuit with wiring arrangement for...

Details Semiconductor integrated circuit with wiring arrangement for... Semiconductor integrated circuit with wiring arrangement for...

2006-10-31

2006-10-31

Chang, Joseph (Department: 2817)

Oscillators

Ring oscillators

C331S045000

Reexamination Certificate

active

07129795

ABSTRACT:
A semiconductor integrated circuit in which, when leading out multiple-phase clock signal wirings from the ring oscillator circuit capable of oscillating at a high frequency, increase in the area of the substrate and deterioration in the clock phase accuracy caused by the non-uniform stray capacitances among the multiple-phase clock signal wirings are prevented. The semiconductor integrated circuit includes: N-stage amplifying circuits connected in a form of a ring to perform oscillating operation, which amplifying circuits are arranged in a semiconductor substrate to be divided into a plurality of rows, wherein in each row an amplifying circuit of “m−1”th stage and an amplifying circuit of “m”th stage are not adjacent to each other, where m is an arbitrary integer number within a range from 2 to N; and a plurality of wirings for respectively leading out a plurality of output signals from the amplifying circuits disposed in one of the plurality of rows.

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