Method and apparatus for applying a rectilinear biphasic power waveform to a load
First Claim
1. A system to deliver a therapeutic quantity of energy to a patient load, the system comprising:
- a capacitor having a rated energy storage capacity substantially equal to the therapeutic quantity of energy;
a boost converter coupled with the capacitor and constructed to release energy from the capacitor at a substantially constant current for a time interval, the boost converter comprising an inductor coupled with the capacitor, a current sensing network, and a solid-state switch coupled between the inductor and the current sensing network; and
an H-bridge circuit coupled with the boost converter and constructed to apply the substantially constant current in a biphasic voltage waveform to the patient load.
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Accused Products
Abstract
A system and method to deliver a therapeutic quantity of energy to a patient. The system includes a capacitor having a rated energy storage capacity substantially equal to the therapeutic quantity of energy, a boost converter coupled with the capacitor and constructed to release energy from the capacitor at a substantially constant current for a time interval, and an H-bridge circuit coupled with the boost converter and constructed to apply the substantially constant current in a biphasic voltage waveform to the patient. The method includes storing a quantity of energy substantially equal to the therapeutic quantity of energy in a capacitor, releasing the quantity of energy at a relatively constant current during a time interval using a boost converter coupled with the capacitor, and delivering a portion of the quantity energy in a direction to the patient using an H-bridge circuit coupled with the boost converter.
30 Citations
20 Claims
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1. A system to deliver a therapeutic quantity of energy to a patient load, the system comprising:
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a capacitor having a rated energy storage capacity substantially equal to the therapeutic quantity of energy; a boost converter coupled with the capacitor and constructed to release energy from the capacitor at a substantially constant current for a time interval, the boost converter comprising an inductor coupled with the capacitor, a current sensing network, and a solid-state switch coupled between the inductor and the current sensing network; and an H-bridge circuit coupled with the boost converter and constructed to apply the substantially constant current in a biphasic voltage waveform to the patient load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of delivering a therapeutic quantity of energy to a patient load, the method comprising:
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storing a quantity of energy substantially equal to the therapeutic quantity of energy in a capacitor; releasing the stored quantity of energy at a relatively constant current during a time interval using a boost converter coupled with the capacitor by transferring energy to an inductor coupled with the capacitor and sensing an amount of current through a solid state switch coupled between the inductor and a current sensing network; and delivering a first portion of the stored quantity of energy in a first direction to the patient load using an H-bridge circuit coupled with the boost converter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system to deliver a therapeutic quantity of energy to a patient load, the system comprising:
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a capacitor having a rated energy storage capacity substantially equal to the therapeutic quantity of energy; a boost converter coupled with the capacitor and constructed to receive a current profile and release energy from the capacitor at a substantially constant current for a time interval consistent with the received current profile; and an H-bridge circuit coupled with the boost converter and constructed to apply the substantially constant current in a biphasic voltage waveform to the patient load.
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Specification