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Actin voltage amplifier circuit diagram

2015-01-02 15:07  
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Actin voltage amplifier circuit diagram
This circuit is used to enlarge a few millivolts of 20 ~ 5000HZ signal voltage. This signal is picked up by putting the 13mm thin silver film on human skin. When people do ECG measurements, each wrist should be put one electrode, the source impedance is up to 50kΩ. The maximum output capacity of the circuit is 9Vp-p voltage. The voltage gain is 1000. RF is the 800K potentiometer to adjust the frequency be higher crossover frequency, then the octave is shut down 12dB.