Abstract: A waveform generator for electrosurgical apparatus disclosed includes a MxNxP storage device and a parallel to series conversion device. For the storage device, M is the maximum number of different waveforms being stored, N equals the number of bits being output from the storage device at a time and P is the maximum number of N bits that can be stored for each waveform. An address counter selects the next N bits of the waveform and these N bits loaded from the storage device into the conversion device and output in a sequential or series output signal to drive the RF power amplifier of electrosurgical apparatus. The output signal has a bit rate N times faster than the storage device is accessed.