System and method of constant power biasing circuit

A system for controlling a thermal expansion of a power dissipating device based on heat generated by the power dissipation, comprising:

• the power dissipating device;
• a data inputting device for inputting a data input value representing a known amount of a reference electrical power to be dissipated by the power dissipating device;
• a calibration device that determines a calibration factor to adjust a component of power;
• a data converter that converts the data input value into the component of power and that modifies the component of power by the calibration factor before the component of power is applied to the power dissipating device;
• a sensor unit that senses a component of power dissipated by the power dissipating device;
• a power measurement unit that measure the power dissipated by the power dissipating device according to the sensed component;
• a comparison unit that compares the measured power dissipated by the power dissipating device with a reference power value to determine whether a difference satisfies a pre-defined criterion;
• and
• a parameter adjustment unit that adjusts the calibration factor based on the comparison to further modify the component of power until the comparison of the measured power dissipated by the power dissipating device and the reference power value satisfies the pre-defined criterion to establish a value of the calibration factor for operation of the power dissipating device.

A fly high controller in a read/write system including a circuit component that is configured to adjust electrical power dissipated by a power dissipating device of the fly high controller, the circuit component comprising:

• a data inputting device for inputting a data input value representing a known amount of a reference electrical power to be dissipated by the power dissipating device;
• a calibration device that determines a calibration factor to adjust a component of power;
• a data converter that converts the data input value into the component of power and that modifies the component of power by the calibration factor before the component of power is applied to the power dissipating device;
• a sensor unit that senses a component of power dissipated by the power dissipating device;
• a power measurement unit that measure the power dissipated by the power dissipating device according to the sensed component;
• a comparison unit that compares the measured power dissipated by the power dissipating device with a reference power value to determine whether a difference satisfies a pre-defined criterion;
• and
• a parameter adjustment unit that adjusts the calibration factor based on the comparison to further modify the component of power until the comparison of the measured power dissipated by the power dissipating device and the reference power value satisfies the pre-defined criterion to establish a value of the calibration factor for operation of the power dissipating device.