Implanted apparatus having micro processor controlled current and voltage sources with reduced voltage levels when not providing stimulation

An implanted apparatus for providing an electrical signal to a living organism, comprising:

• a battery for providing electrical energy;
• a power supply circuit connected to said battery and having a voltage output responsive to a signal to select between two voltage output levels;
• a microprocessor having its power input connected to said power supply voltage output and having a plurality of inputs and outputs, one of said outputs connected to provide a signal to select said power supply voltage output level;
• a current source for providing the electrical signal to the living organism, said current source being coupled to said outputs of said microprocessor to control the production and level of the signal provided by said current source;
• a voltage source connected to said current source and to said battery to provide operating energy for said output signal, said voltage source being coupled to said microprocessor outputs to control the production and level of the voltage provided by said voltage source;
• and
• means for directing said microprocessor to set output levels to select the lower power supply output voltage level and to disable production of signals by said current source and said voltage source when the electrical signal is not being provided to the living organism and for directing said microprocessor to set output levels to select the higher power supply output voltage level and to enable production of signals by said current source and said voltage source when the electrical signal is being provided to the living organism.