Patent ID: 7313060
Filing Date: 2007-12-25
Classification: G11B

Abstract:
1. An optical disk system comprising: at least one photo detector for detecting at least a part of said optical disk and in response generating detection signals; at least one variable gain amplifier for amplifying detection signals and forming amplified detection signals; at least one slicer for slicing the amplified detection signals to form a sliced output by comparing the amplified detection signals with a reference signal; at least one generator in a feedback path between said at least one slicer and said at least one variable gain amplifier for controlling said at least one variable gain amplifier non-linearly; wherein said at least one generator comprises two converters interconnected with two connections, and at least one capacitor connected between the two connections; and a differential time delay detector configured to receive the sliced output and a further signal and to detect any time delay between the sliced output and the further signal.