1. An electronic tissue stimulator system, comprising: at least three electrodes to be implanted adjacent tissue to be stimulated in a patient; means connected to said electrodes for programmably determining a positive, negative and high impedance state for each electrode; transmitting means for transmitting programming data to define for each of said electrodes said positive, negative or high impedance state; and receiving means to be surgically implanted within said patient for receiving said programming data, for generating stimulation pulses and for delivering said stimulation pulses to said electrodes having positive and negative states as defined by said programming data.