Selectable boost converter and charge pump for compliance voltage generation in an implantable stimulator device
First Claim
1. A medical device, comprising:
- electrodes configured to stimulate a patient'"'"'s tissue;
a first converter circuit configured to convert a first voltage to a compliance voltage when enabled; and
a second converter circuit configured to convert the first voltage to the compliance voltage when enabled,wherein the first converter circuit and second converter circuit are not configured to be simultaneously enabled, andwherein the compliance voltage is configured to provide power for the electrodes to provide stimulation at the patient'"'"'s tissue.
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Abstract
Compliance voltage generation circuitry for a medical device is disclosed. The circuitry in one embodiment comprises a boost converter and a charge pump, either of which is capable of generating an appropriate compliance voltage from the voltage of the battery in the device. A boost signal from compliance voltage monitor-and-adjust logic circuitry is processed with a telemetry enable signal to selectively enable either the charge pump or the boost converter: if the telemetry enable signal is not active, the boost converter is used to generate the compliance voltage; if the telemetry enable signal is active, the charge pump is used. Because the charge pump circuitry does not produce a magnetic field, the charge pump will not interfere with magnetically-coupled telemetry between the implant and an external controller. By contrast, the boost converter is allowed to operate during periods of no telemetry, when magnetic interference is not a concern.
61 Citations
17 Claims
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1. A medical device, comprising:
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electrodes configured to stimulate a patient'"'"'s tissue; a first converter circuit configured to convert a first voltage to a compliance voltage when enabled; and a second converter circuit configured to convert the first voltage to the compliance voltage when enabled, wherein the first converter circuit and second converter circuit are not configured to be simultaneously enabled, and wherein the compliance voltage is configured to provide power for the electrodes to provide stimulation at the patient'"'"'s tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification