A Predictable Fixed Gain Instrumentation Amplifier
نویسندگان
چکیده
This paper presents a predictable fixed gain instrumentation amplifier using switched capacitor instead of resistor to improve the accuracy of the gain as 10. This instrumentation amplifier builds up by two operational amplifiers which connect by switched capacitor. These switched capacitors are used to stable the whole circuit, fix the gain of total instrumentation amplifier. Using two operational amplifiers can achieve high input impedance, high CMRR and wide input swing voltage. These two operational amplifiers should have different characteristics. The first sampling amplifier is mainly used to sample the signal and the second amplifier is mainly used to amplify the signal. Keywords—switched capacitor; instrumentation amplifier; fixed gain; CMRR; noise ; input impedance
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