Patent ID: 6324198
Filing Date: 2001-11-27
Classification: G11B

Abstract:
A temperature compensation apparatus of a laser diode, for controlling an output power of the laser diode by changing a control voltage according to a temperature variation of the laser diode, comprising:a comparator to compare a voltage corresponding to the output power of the laser diode with a reference voltage, to generate an error voltage;a first counter to count a first count value responsive to the error voltage, to generate a corrected error voltage, and to perform up and down counting of the first count value to change the corrected error voltage in response to a detection signal;a detector to detect whether the first count value overflows or underflows, and to generate the detection signal in response to the first count value overflowing or underflowing;a second counter to perform down and up counting of a second count value in response to the detection signal, in a reverse order to that of the first counter; anda control voltage generator to generate the control voltage based upon the corrected error voltage, and to add the first count value to the second count value when the first count value overflows or underflows to generate the control voltage as a uniform value.