Abstract: A feed forward power control loop is provided for a tissue stimulation system. The tissue stimulating system includes an external device and an implantable device. Only the amount of power required by the implantable device is transmitted across a transcutaneous transmission link to the implantable device from the external device, thereby reducing power fluctuations within the implantable device, and reducing the amount of power expended by the external device. In one embodiment, the power control loop is used with a cochlear stimulating system that includes an externally wearable signal receiver and processor (WP) and an implanted cochlear stimulator (ICS). The feed forward power control loop predicts the power requirements of the ICS. The prediction is used to determine the level of RF power to be transmitted by the WP.