What does this op-amp circuit do? (part of an ECG)
My answer to SE EE question What does this op-amp circuit do? (part of an ECG) I have realized that my meeting with TL Fong somehow changed the course of my life... The fact that still there are such curious, enterprising and, above all, well-meaning and honest people on the web seems to multiply my creative abilities. Every day he asks me more and more questions to discuss... which makes me think, over and over again, about great circuit ideas... understanding them better... and finding better explanations... Three days ago, he put the topic of ECG amplifiers and thus he brought me back to my answer above in SE EE from a year ago. I temporarily stopped thinking about his previous question about Tunnel Diode I-V Curve Plotting and begin thinking again about this ingenious circuit idea implemented in the so-called "right leg driven circuit" (RDL). So I realized even more deeply the great idea behind it and expanded my answer in EE. Here it is... Answer I saw...