| 摘要 |
<p>Disclosed is a battery powered portable bone stimulator which includes a battery source of power, a device for temporarily storing power, circuitry for generating stimulating pulses utilizing the device of storing power, and a medical treatment inductor coil for interaction with the body of a patient. The invention includes an arrangement for recovering power during collapse of the magnetic field of the coils as current decreases and for directing such power to the device for temporarily storing power. In one embodiment, energy from batteries is stored in a capacitor. The capacitor is discharged to provide a high current pulse for driving the coil. Energy from this current flow is stored as inductive energy in the coil when current is increasing. When energy from the capacitor is stopped, current in the coil decreases and the magnetic field collapses. The released inductive energy is captured and stored in the capacitor as electrical energy for a successive current pulse to the coils. Various embodiments are applicable to differing types of circuits which provide a treatment pulse from the coils either during the driven portion of a waveform or during the flyback portion in which coil current is decreasing.</p> |
