Abstract: In one embodiment, the present invention includes a controller coupled to an optical modulator to receive a dither signal, determine a difference between the dither signal and a previous dither signal, determine a derivative of the difference with respect to a bias voltage difference between first and second bias voltages, and control a bias voltage for the optical modulator based on the derivative. Other embodiments are described and claimed.

Abstract: The present invention includes controller coupled with actuators, swivel balanced arm holder with rotating head, location position information system that can maintain emitter of medical Emitter/Sensor Positioning System in desired position. This enables surgeon to reduce number of personnel in operating room, reduces the time of the surgery, makes incisions and cuts more precise.

Abstract: In one embodiment, the present invention includes a controller coupled to an optical modulator to receive a dither signal, determine a difference between the dither signal and a previous dither signal, determine a derivative of the difference with respect to a bias voltage difference between first and second bias voltages, and control a bias voltage for the optical modulator based on the derivative. Other embodiments are described and claimed.

Abstract: According to embodiments of the present invention, an optical modulator control apparatus receives a data signal and determines amplitude and cross-point of the data signal using a full wave detector. The apparatus sums the negative and positive halves of the data signal to determine the amplitude and differences the negative and positive halves of the data signal to determine the cross-point. Measurement of the amplitude may be independent of the cross-point.

Abstract: An apparatus comprising a control system coupled to an optical modulator. The control system including an Radio Frequency (RF)/dither ratio unit coupled to the optical modulator, wherein the RF/dither ratio unit to modify an amplitude of a dither signal inputted into the optical modulator to maintain a constant ratio between the amplitude of the dither signal and an amplitude of an RF input signal inputted into the optical modulator.

Abstract: Methods and apparatus for controlling performance of electric motors in a system having two or more electric motors, the motors adapted for being coupled to two or more wheels of an electric vehicle, each of the electric motors having armature and field coils which are independently excited by a source of voltage to generate armature and field currents, the armatures being connected in series to the voltage source include detecting a condition in the system indicating that one of the wheels is slipping, reducing power delivered to one of the motors that is associated with the slipping wheel in response to the detection of the condition, providing power to the one or more motors that are not associated with the slipping wheel after the power delivered to the motor associated with the slipping wheel is reduced, and restoring the power delivered to the one of the motors associated with the slipping wheel in response to a recovery event.

Abstract: Methods and apparatus for controlling performance of electric motors in a system having two or more electric motors, the motors adapted for being coupled to two or more wheels of an electric vehicle, each of the electric motors having armature and field coils which are independently excited by a source of voltage to generate armature and field currents, the armatures being connected in series to the voltage source include detecting a condition in the system indicating that one of the wheels is slipping, reducing power delivered to one of the motors that is associated with the slipping wheel in response to the detection of the condition, providing power to the one or more motors that are not associated with the slipping wheel after the power delivered to the motor associated with the slipping wheel is reduced, and restoring the power delivered to the one of the motors associated with the slipping wheel in response to a recovery event.