The biological electrical signals preamplifier circuit composed of the INA102

Published:2011/6/30 21:35:00 Author:Rebekka | Keyword: biological electrical signals , preamplifier | From:SeekIC

The figure shows the biological signals preamplifier circuit. They need to measure the biological electrical signals of the human body in the medical instrument, such as the electrocardiogram, eeg, etc. Due to the creatures signal is weak, the requirements of the amplifier circuit is very high. This circuit chooses the low power consumption meter with the integrated op-amp INA102. The features of the integrated chips INA102 are: Static current small (maximum is 750 mu A); The internal gain can pass the tube feet and change, the different connecting choice of gain is: l, 10, 100 and 1000 in the photo, pins 4 and 7 are connected with 5, and 6 pins and get the biggest gain 1000.



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