An implantable electrical stimulator is disclosed, which includes two stimulating electrode, a SoC and an inducing coil. The SoC can apply electric stimulation to the dorsal root ganglion via the stimulating electrodes. An external power source can wirelessly charge the SoC through the inducing coil.一種植入式電刺激器在此揭露,其包括兩刺激電極、一系統單晶片與一感應線圈。系統單晶片可經由刺激電極來對一背根神經節施予電刺激,一外部電源可透過感應線圈對系統單晶片作無線充電。100...植入式電刺激器110...整流器120...電壓限制器130...穩壓器140...時脈再生器150...射頻接收器160...控制器170...驅動器181、182...刺激電極200...感應線圈300...外部電源310...感應線圈400...射頻發射器500...背根神經節510...皮膚