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AN3095 Folha de dados(PDF) 29 Page - STMicroelectronics |
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AN3095 Folha de dados(HTML) 29 Page - STMicroelectronics |
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29 / 55 page ![]() AN3095 Schematic description Doc ID 16555 Rev 3 29/55 Figure 16. Schematic of the AC voltage measurement circuit The circuit is supplied by the 5 V bus generated by the multi-output power supply and the measured voltage is fed through connector J11. The output voltage of this circuit is then equal to the sum of the measured voltage plus an offset voltage according to the following equation: Equation 52 Where Vmeas is the voltage on J11, Vcc is the 5 V supply voltage and Vout is the voltage on pin 8 of the operational amplifier. The line current conditioning circuit was designed in a similar way and the electrical scheme is shown in Figure 17: 12 R / 13 R 11 R 12 R // 13 R V 13 R // 11 R 12 R 13 R // 11 R V V cc . meas out + + + = |
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