[A bipolar optocoupler isolation amplifier with high precision and wide bandwidth].
To fit the technological requirements in electrical impedance tomography system, an improved bipolar optocoupler isolation amplifier based on single analog optocoupler was realized. The experimental results illustrates that the full power -3dB bandwidth of this circuit is greater than 800 KHz, the equivalent output noise is lower than 50 uV(RMS), and the linearity at +/- 4 V inputs is lower than 0.01%. In addition to these features, the circuit also have the advantages of simple structure and no distortion caused by mismatch between analog optocouplers.
Shi
Xuetao
X
Department of Medical Electronic Engineering, Faculty of Biomedical Engineering, The Fourth Military Medical University, Xi'an 710033, China.
You
Fusheng
F
Ji
Zhenyu
Z
Fu
Feng
F
Liu
Ruigang
R
Dong
Xiuzhen
X
D000669:Amplifiers, Electronic; D017097:Electric Impedance; D004867:Equipment Design; D006801:Humans; D014054:Tomography / Q000295:instrumentation*