8 Instrumentation and Medical Isolation Amplifiers
8.1 INTRODUCTION
Instrumentation amplifiers (IAs) are basically IC differential amplifiers characterized by having very high input impedances, a very high common-mode rejection ratio (CMRR), and a midband differential gain generally in the range from × 1 to × 1000, set by a single resistor. In addition, IAs are also designed to have low noise, low offset voltage, low bias current, and offset current.
Medical isolation amplifiers (MIAs) are basically IAs that have an ultralow conductance pathway between the input (patient) terminals and the output terminals, the power supply, and ground. These ...
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