a method and system of providing therapy to a patient using electrodes implanted adjacent tissue . the method comprises regulating a first voltage at an anode of the electrodes relative to the tissue , regulating a second voltage at a cathode of the electrodes relative to the tissue , and conveying electrical stimulation energy between the anode at the first voltage and the cathode at the second voltage , thereby stimulating the neural tissue . the system comprises a grounding electrode configured for being placed in contact with the tissue , electrical terminals configured for being respectively coupled to the electrodes , a first regulator configured for being electrically coupled between an anode of the electrodes and the grounding electrode , a second regulator configured for being electrically coupled between an anode of the electrodes and the grounding electrode , and control circuitry configured for controlling the regulators to convey electrical stimulation energy between the anode and cathode .