摘要: There is a need for isolated current sources use in selected bio- impedance measurement circuits. The requirement good isolation particularly important medical settings because of safety concerns. A new circuit producing voltage-controlled presented. Measurements have been made on prototype and simulations done SPICE model. presented an H-bridge where the output devices are photodiodes high-linearity optocouplers. Five operational amplifiers, four high linearity optocouplers, passive components used. Output capability ±35 μA with that more than 1 MΩ. It possible to achieve bandwidths above MHz small load impedances. This well suited applications thanks
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