Implantable stimulator with terminal voltage control of a depletable voltage source
First Claim
1. An implantable stimulator, comprising:
- a depletable voltage source for supplying electrical energy, the voltage source having a terminal voltage which varies as a function of depletion of the voltage source;
an output stage receiving electrical energy from the voltage source and including means for generating a stimulation voltage that is increased with respect to the terminal voltage of the voltage source and a stimulation energy storage device for storing the stimulation voltage;
a control device receiving operational energy from the voltage source and being operatively connected for controlling a stimulation operation of the stimulation energy storage device; and
a pump control device receiving operational energy from the voltage source and being operatively connected to the output stage for controlling at least one of a time interval and a current strength of the electrical energy supplied to the output stage so that a minimum operating voltage required for a safe operation of the control devices is maintained as the terminal voltage of the voltage source.
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Accused Products
Abstract
An implantable stimulator includes a depletable voltage source for supplying electrical energy. The voltage source has a terminal voltage which varies as a function of depletion of the voltage source. An output stage receives electrical energy from the voltage source and includes an arrangement for generating a stimulation voltage that is increased with respect to the terminal voltage of the voltage source and a stimulation energy storage device for storing the stimulation voltage. A control device receives operational energy from the voltage source and is operatively connected for controlling a stimulation operation of the stimulation energy storage device. A pump control device receives operational energy from the voltage source and is operatively connected to the output stage for controlling at least one of a time interval and a current strength of the electrical energy supplied to the output stage so that a minimum operating voltage required for a safe operation of the control devices is maintained as the terminal voltage of the voltage source.
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Citations
12 Claims
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1. An implantable stimulator, comprising:
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a depletable voltage source for supplying electrical energy, the voltage source having a terminal voltage which varies as a function of depletion of the voltage source; an output stage receiving electrical energy from the voltage source and including means for generating a stimulation voltage that is increased with respect to the terminal voltage of the voltage source and a stimulation energy storage device for storing the stimulation voltage; a control device receiving operational energy from the voltage source and being operatively connected for controlling a stimulation operation of the stimulation energy storage device; and a pump control device receiving operational energy from the voltage source and being operatively connected to the output stage for controlling at least one of a time interval and a current strength of the electrical energy supplied to the output stage so that a minimum operating voltage required for a safe operation of the control devices is maintained as the terminal voltage of the voltage source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification