Importance

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Abstract

A clock supplying circuit that supplies a clock to a plurality of controlled circuits 451-454 arranged in respectively different positions. A forward and backward wiring 41, 42 and an internal clock supply wiring 43 are arranged along controlled circuits. A main clock drive circuit 40 is for outputting a first clock to the forward wiring 41 and is for outputting a second shorter phase than the first clock to the internal clock supply wiring 43. A plurality of local clock drive circuits 441-444 arranged close to the controlled circuits, are supplied with a forward clock propagated along the forward wiring and with a back clock propagated along the backward wiring, and are also supplied with the second clock, for delaying the phase of the supplied second clock so as to coincide with a phase intermediate the forward clock and the back clock, and for supplying the delayed clock of the second clock to the respectively corresponding controlled circuits as local clock.

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First Claim