Patent ID: 7286462

Claim:
A CD recorder having a power control signal, which has a read level, an erase level and a write level, wherein the read level equals a sum of a reference voltage and a read power control voltage, the erase level equals a sum of the read level and a first write power control voltage, and the write level equals a sum of the erase level and a second write power control voltage, the CD recorder comprising: a pickup device for reading, erasing or writing a disk and generating a feedback control signal, the pickup device comprising: a laser diode for receiving the power control signal, which enables the laser diode to generate a laser beam to read, erase or write the disk; and a monitor diode for sensing intensity of the laser beam, wherein the CD recorder generates the feedback control signal according to the intensity of the laser beam sensed by the monitor diode; a read control circuit having a read target value digital-to-analog converter for storing a plurality of first digital values and converting one of the first digital values into a first analog value, wherein the read control circuit generates the read power control voltage according to the feedback control signal and the first analog value; and a write control circuit having a write target value digital-to-analog converter for storing a plurality of second digital values and converting one of the second digital values into a second analog value, wherein the write control circuit generates the first write power control voltage and the second write power control voltage according to the read power control voltage and the second analog value, wherein the read power control voltage is automatically and dynamically adjusted as the feedback control signal varies, such that the read level, the erase level and the write level of the power control signal are also automatically and dynamically adjusted as the read power control voltage varies.