INA321 322 a low-cost medium accuracy ECG machine ECG amplifier


Posted on Mar 28, 2007

As shown by INA321/322 constitute a low-cost, medium accuracy ECG machine ECG amplifier circuit shown. INA321 input signal from the patients arm around/322, the INA321/322 ampl


INA321 322 a low-cost medium accuracy ECG machine ECG amplifier
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ified output to the operational amplifier OPA336, OPA336 produce an output voltage from the inverting amplifier VOUTPUT 100 times. Common-mode voltage is done by 2M resistance. VR inverting amplifier OPA336 to provide a bias voltage, the output voltage as a bias voltage for the operating point changes. Similarly, by another OPA336 form a feedback added to the REF terminal INA321/322 as a bias voltage, INA321/322 6 pin output voltage as a bias voltage is small for a change. The OPA336 as a voltage follower, for the right leg drive. For filter requires different applications, you can change the output of the capacitance value to meet.




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