Patent ID: 7102976

Claim:
An apparatus for generating a write pulse for an optical storage medium, comprising: a ring oscillator outputting n tap signals; and a pulse generation unit converting a channel clock signal to have a cycle as long as an interval among the n tap signals, and generating a write pulse based on the converted channel clock signal, wherein the pulse generation unit comprises: a tap controller converting a signal to be written on the optical storage medium into a write signal having a cycle as long as an interval among the n tap signals, and converting the channel clock signal into a channel clock signal having a cycle as long as the interval among the n tap signals, and outputting the write signal and the channel clock signal; a selector selecting two tap signals among the n tap signals as a write start signal and a write end signal, based on the write signal output from the tap controller, and outputting the two tap signals; and a pulse generator generating a write pulse connecting the write start signal and the write end signal by using the tap signals output from the selector and the result of comparing the write signal and the channel clock signal output from the tap controller.