Defibrillator with solid state protection circuitry

A defibrillator with patient protection circuitry, comprising:

• a therapeutic defibrillation waveform generator configured to generate one or more therapeutic defibrillation waveforms for delivery to a patient via a pair of leads, each of the leads directly connected to one of two pads configured to directly contact the patient during the delivery of the therapeutic defibrillation waveforms;
• a charging circuit configured to charge the therapeutic defibrillation waveform generator via a defibrillation capacitor;
• patient protection circuitry comprising one or more triodes for alternating current (TRIACs) separate from the therapeutic waveform generator and positioned directly between the therapeutic defibrillation waveform generator and at least one of the leads, each of the TRIACs configured to switch between a conductive state and an isolated state, wherein the TRIACs prevent the therapeutic defibrillation waveforms from reaching the patient in the isolated state and allow the therapeutic defibrillation waveforms to reach the patient in the conductive state;
• and
• a microcontroller control element configured to deliver one or more of the therapeutic defibrillation waveforms and to cause shifting of the TRIACs from the isolated state to the conductive state and activation of the charging circuit and the therapeutic defibrillation waveform generator, wherein the charging circuit and the therapeutic defibrillation waveform generator are not under bias until the activation of the charging circuit.