1. An apparatus for providing electrical stimulation pulse trains of selectable parameters to electrodes which are implanted in muscle tissue, the apparatus comprising: an antenna for receiving an input signal which includes a carrier frequency modulated with encoded stimulus pulse train parameters; an energy converting means for converting energy from the carrier frequency into electrical potential; a decoding means connected with the antenna for decoding the encoded stimulus pulse train parameters from the received modulated input signal, said encoded stimulus pulse train parameters including at least an indication of which electrode is to apply the stimulus pulse train, a pulse width of the pulses of the pulses of the pulse train, and an amplitude of the pulses of the pulse train; for each electrode, a separate electrical energy storage means connected with the energy converting means for receiving and storing electrical energy obtained from the carrier frequency by the energy converting means, the stored electrical energy being sufficient to produce a biphasic pulse to stimulate said muscle tissue; and for each electrode, a stimulus pulse means, connected with a respective electrical energy storage means for receiving the stored electrical energy therefrom and with the decoding means for receiving pulse train parameters therefrom, for selectively passing pulses of the electrical potential to the selected stimulus electrode with at least the selected pulse width and amplitude.