the high precision region voltmeter

Published:2011/8/26 6:43:00 Author:Ariel Wang | Keyword: high precision , region voltmeter | From:SeekIC

The circuit adopts the amplifier and high precision components.It improves the performance of the region voltmeter greatly.The inverting input of IC2 meter amplifier AD623 uses the high precision voltmeter reference IC1 as a standard.The noninverting input ends R1,RP1 and R3 enlarge the voltmeter to be measured.RP1 is the zero potentiometer .RP2 is the gain adjustment potentiometer.The amplifier output end is enlarged by the branched resistance R4.Then it connects the table head with the starting value and the termination value.You can select a region of voltmeter Vin to be measured.The starting value is V1.The termination value is V2.The voltmeter Vin to be measured changes within the range of V1～V2.



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