Patent ID: 7408861
Filing Date: 2008-08-05
Classification: H03M

Abstract:
1. A recording or reproduction apparatus for optical recording media having a servo regulating circuit and means for increasing the resolution of a digital-to-analog converter, which has a smaller bit width than its digital data source in the servo regulating circuit, wherein less significant bits of the digital data source are quantized by means of a pulse density method or a pulse width method and the quantization result is added to the value of more significant bits of the digital data source with the exception of the maximum value of the more significant bits by an incrementer arranged between the digital data source providing the more significant bits and the digital-to-analog converter, which integrates the quantization result for increasing the resolution and precision of the output signal of the digital-to-analog converter, which is operated with a clock rate at least corresponding to the clock rate of the digital data source.