DEVICE FOR FORMING A BIPOLAR SIGNAL

The invention relates to the field of medical technology, specifically to defibrillators, and can be used in medical institutions for reanimation, cardio surgery and intensive therapy departments and for departments of emergency aid, and also in pre-hospital stages of medical aid. The device for forming a bipolar signal comprises an electric power accumulator, electronic controllable switches which commutate said electric power, and a circuit for controlling said switches. In order to form a signal of positive and negative polarity, an electric power accumulator, which is connected to a circuit of consecutively connected switches, is set up. Each of the switches is connected in parallel to a resistor. The circuit for controlling the switches in order to change the pulse shape controls the connection of the electronic switches and circuit for forming the bipolar signal. The circuit for forming the bipolar signal consists of four switches consecutively connected to the electric power accumulator and to the circuit for changing the pulse shape in such a manner that, when the first and fourth switches are connected up, a current via a load flows in the direction forming a signal of positive polarity and, when the second and third switches are connected up, a current via a load flows in the direction forming a signal of negative polarity. The signals for controlling the electronic switches comes from the control circuit for forming the bipolar signal. The technical result of the present invention comprises simplifying the electric circuit. L'invention se rapporte au domaine des techniques médicales, notamment celui des défibrillateurs, et peut être utilisée dans des établissements médicaux dans les services de réanimation, de chirurgie cardiaque, de soins intensifs, ainsi que dans les services ambulanciers d'urgence, et au cours des étapes pré-hospitalières d'aide médicale. Ce dispositif de génération de signal bipolaire comprend un accumulateur d'énergie électrique, des commutateurs de commande électroniques le commutant et un circuit de commande de ces commutateurs. Afin de générer un signal ayant une polarité positive et négative, on utilise un accumulateur d'énergie électrique qui est connecté à un circuit de commutateurs connectés en série. Chaque commutateur est connecté en parallèle à une résistance. Le circuit de commande de commutateurs permettant de modifier la forme de l'impulsion commande la mise en marche des commutateurs électroniques et le circui