Abstract: The present invention discloses a power supply device, particularly for supplying a controlled electrical signal in an electrochemical process, e.g., plating, etching, etc. The power delivery device provides an electrical signal with optimal characteristics and setting for processing one or more surfaces in an electrochemical process. The power delivery device comprises a power stage having an input for receiving a power signal and an output being operably connected to the object. A sensor is operably connected to the output. A controller is operably connected to the output and responsive to the sensor. A modulator is operably connected between the controller and the power stage wherein the power stage outputs the electrical signal to the object in response to the modulator and the controller.

Abstract: A power supply for producing complex non-periodic waveforms from a sum of periodic waveforms is disclosed. The power supply includes a controller which measures the output signal and compares it to the desired signal in order to produce an error signal. The error signal is fed to the power stage and is used to modify the input signal and produce the desired output. The desired signal is programmed by the user by selecting a plurality of pre-defined stored waveforms, modifying them, and arranging them such that the desired complex non-periodic waveform is created. The user can enter the instructions for modifying and arranging the waveforms via a panel having a keypad and display, or using a computer running software which enables the user to modify the stored waveforms on-screen. Such control is particularly useful in industries in which a very specific complex output signal is desirable, such as in the electrolytic plating industry.