Patent ID: 8463390

Claim:
An electrostimulator, comprising: a boost circuit with no transformer, which is configured to receive a power supply from a battery and outputs a stimulus signal; a first electrode and a second electrode which are adapted to be disposed on a skin surface, detect a voluntary myoelectric signal from the skin surface, and provide the stimulus signal output from the boost circuit to the skin surface; an amplification circuit which amplifies the voluntary myoelectric signal detected by the first and the second electrodes; a controller which controls the stimulus signal in accordance with the voluntary myoelectric signal detected by the first and the second electrodes; an H-bridge circuit which comprises a first switch and a third switch that are connected in series and have a common connection terminal that is connected to the second electrode, and a second switch and a fourth switch that are connected in series and have a common connection terminal that is connected to the first electrode, the first switch, the second switch, the third switch, and the fourth switch being connected in parallel, and the H-bridge circuit being controlled by the controller; an isolated DC-DC converter which is configured to receive the power supply from the battery and supplies power to the controller and the amplification circuit; a regulator which outputs a midpoint voltage of a power-supply voltage outputted by the DC-DC converter; and a third electrode which is connected to the regulator and a reference terminal of the amplification circuit, and which is adapted to be disposed on the skin surface.