| CPC A61N 1/3614 (2017.08) [A61N 1/36125 (2013.01); A61N 1/36153 (2013.01); A61N 1/36157 (2013.01); H02M 1/007 (2021.05); H02M 1/0077 (2021.05); H02M 3/07 (2013.01)] | 22 Claims |
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1. An electrical stimulation device, comprising:
a boost circuit, generating a plurality of voltages, wherein each of the voltages has a different voltage value;
a voltage selecting circuit, coupled to the boost circuit and selecting one voltage from among the voltages according to a reference voltage on a tissue impedance to generate an output voltage; and
a control circuit, coupled to the boost circuit and in response to electrical stimulation, transmitting a control signal to enable the boost circuit,
wherein the voltage selecting circuit comprises a plurality of stages of selecting circuits, wherein the stages of the selecting circuits correspond to the voltages, respectively,
wherein each stage of the selecting circuits comprises:
a diode, coupled to the boost circuit;
a first Zener diode; and
a first transistor, wherein a first drain of the first transistor is coupled to the diode, a first source of the first transistor is coupled to one end of the first Zener diode, and a first gate of the first transistor is coupled to the other end of the first Zener diode.
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