Patent ID: 6845080
Filing Date: 2005-01-18
Classification: G11B

Abstract:
1. A peaking preventing automatic gain controller (AGC) for amplifying a signal reproduced from an optical disc to a signal having a peak-to-peak voltage of a uniform magnitude and for generating the amplified signal as an output signal, in an optical disc reproducing system, the AGC comprising: a capacitor charged to a control voltage corresponding to a control current; an amplifier for inputting the optical disc reproducing signal as an input signal, amplifying the input signal by a gain corresponding to the control voltage, and generating the amplified input signal as the output signal; a peak detector for detecting a peak voltage in the output signal; a gm amplifier for converting the peak voltage detected by the peak detector into current and generating the converted current as the control current; and a peaking controller for preventing the capacitor from being charged by the control current in a defect section in the input signal, in response to a peaking control signal.