Patent ID: 7898312

Claim:
A variable delay apparatus for delaying an input signal by a delay amount corresponding to a delay selection signal, and outputting a selected delayed signal, the apparatus comprising: first to I-th variable delay blocks (I is a natural number) which delay the input signal by first to I-th delay amounts that are respectively set by the delay selection signal, the first to I-th variable delay blocks output respective delayed signals; and a first selector which selects one of the respective delayed signals of the first to I-th variable delay blocks correspondingly with an output selection signal that is produced in correspondence with the first to I-th delay amounts, and outputs the selected delayed signal, wherein the output selection signal is produced so that, in a case where a first delay amount is changed, when a first delayed signal outputted by a first variable delay block has a delay amount which is different from a set value for the first variable delay block, the first selector selects one of the respective delayed signals of the second to I-th variable delay blocks.