Design an EKG amplifier interface to a 6811/6812(figure 12.62). The biopotential

Question

Design an EKG amplifier interface to a 6811/6812(figure 12.62). The biopotential is a ±5-mV signal measured between the left and right arms using silver-silver chloride electrodes. A third electrode is placed in the right leg and is used as a reference. To make the entire system battery-operated, low-power rail-to-rail TLC2274 op amps will be used, each powered with +5 and ground. Notice that the analog system uses the 2.5V signal as its reference.


a) Design the preamplifier that has the following characteristics: differential input, gain=10, good CMRR, high Zin, low Zout, and bandwidth>200Hz. Show resistors values, but not pin numbers.

Explanation / Answer

http://books.google.co.in/books?id=mgZ7ed_OZgoC&pg=PA645&lpg=PA645&dq=design+the+preamplifier+that+has+the+following+characteristics:+differential+input,+gain%3D10,+good+CMRR,+high+Zin,+low+Zout,+and+bandwidth%3E200Hz.+Show+resistors+values,+but+not+pin+number&source=bl&ots=Xb6IaguelW&sig=xEt1LX2ck0yJiZcXBovhaoZEBWY&hl=en&sa=X&ei=KJwNT5qjLIPNrQfWna2TBA&ved=0CC4Q6AEwAA#v=onepage&q=design%20the%20preamplifier%20that%20has%20the%20following%20characteristics%3A%20differential%20input%2C%20gain%3D10%2C%20good%20CMRR%2C%20high%20Zin%2C%20low%20Zout%2C%20and%20bandwidth%3E200Hz.%20Show%20resistors%20values%2C%20but%20not%20pin%20number&f=false http://www.ece.utexas.edu/~valvano/EE345Moldquiz/Quiz1Su98.pdf

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