Abstract: A defibrillator comprises a discharging circuit provided with a storage capacitor, a controlled contactor, and electrodes for defibrillation connected in series therebetween. The output of a voltage source and a control unit for adjusting and controlling a voltage across the capacitor are connected to the capacitor. The voltage source input is connected to the output of the control unit. The defibrillator comprises two AND gates, each having two inputs and an output, a unit for starting defibrillation, and an electronarcosis device. The first AND gate has an input connected to the output of the control unit. The first AND gate has a second input connected to the unit for starting defibrillation, while the first AND gate output is connected to the first input of the second AND gate. The second AND gate output is connected to the controlled contactor input.

Abstract: Each of two channels has a sine wave oscillator, an electronic key, an amplifier and a pair of electrodes, electrically connected in series. A pair of threshold circuits are provided. Each of the threshold circuits has an input electrically connected to the amplifier of a corresponding one of the channels and an output. A first coincidence circuit has a pair of inputs each electrically connected to the output of a corresponding one of the threshold circuits, and an output. The output of the first coincidence circuit is electrically connected to a first input of a second coincidence circuit. The second coincidence circuit has a second input to which signals are fed from the output of a first time delay element. The output of the first time delay element is also connected to the input of a second time delay element. The output of the second time delay element is electrically connected to the control inputs of the electronic keys of the channels.