SDRAM AND DATA PROCESSING DEVICE

摘要

PROBLEM TO BE SOLVED: To sufficiently reduce temperature dependence of a device, power source voltage dependence, process dispersion, and the like. SOLUTION: When a load element is coupled to an output node of a unit delay circuit in a first delay circuit train 600, a load element is coupled to an output node of a unit delay circuit in a second delay circuit train 800 also, wherein loading conditions of each circuit are equalized. With such arrangements, wave-form characteristics in rise and fall (tr/tf) and a delay time of the first delay circuit train 600 and the second delay circuit train 800 are equalized, and deviation of a center axis of error in a low frequency band and a high frequency band is reduced.