Patent ID: 6879551

Claim:
An apparatus for generating a radio frequency (RF) signal and control signals in which the current output from each of a plurality of light receiving elements is converted into voltage signals and the RF signal and the control signals are generated in response to the voltage signals, the apparatus comprising: an input data processing unit for performing time-sharing sampling on the voltage signals and converting the voltage signals into first digital signals in response to an analog/digital conversion clock signal having a predetermined period and a sequentially applied selection signal; a digital filter for filtering each of the first digital signals to modify the shape of the waveforms of the first digital signals and outputting the modified waveforms as second digital signals; a servo signal generating unit for correcting delay time of the second digital signals and generating the control signal for servo control in response to the corrected second digital signals; a digital RF data generating unit for correcting delay time of the second digital signals before summing the corrected second digital signals to generate digital RF data; and a reference comparator for comparing an average value of the digital RF data with the voltage level of the digital RF data in response to a predetermined demodulation clock signal and generating a non-return to zero (NRZ) signal in response to a compared result.