Published:2011/5/17 3:00:00 Author:Ecco | Keyword: EGC, right leg , drive amplifier , defibrillator shock protection , calibrator | From:SeekIC
EGC right leg drive amplifier circuit with defibrillator shock protection and calibrator composed of INA102 and ISO106 is shown as the chart. The circuit has three ganged SPDT switches, the switch being connected to the calibration shows calibration state, the on shows the circuit being in measured state. When the circuit is in the measurement state, the output signal of left and right arm is amplified by INA102 and sent to the ISO106, and it is isolated, amplified and output by by ISO106. The output signal of of op amp OPA121 is the drive signal of right leg. When the circuit is in the calibration state, 5V reference voltage is divided by 5MΩ and 1kΩ resistors, it attenuates 5000 times.
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