摘要 |
<p>Defibrillators for applying stimulation pulses to the heart, are tested on a circuit which has receiving electrodes (6, 7) for the defibrillator electrodes, across which is a load resistance (8) simulating the resistance of the human body. Across the electrodes is also a rectifier bridge (11) forming an integrator circuit, and connecting them to the measuring instrument (14). Across this is a quenching switch (13). An alternative design, designed to retain the test signals for a given time has the simulated resistance formed by two separate resistances, and the electrodes are connected by load resistances to a rectifier bridge. This is followed by an active integrator fed by a storage capacitor.</p> |