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TSH350IDT Datenblatt(PDF) 16 Page - STMicroelectronics |
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TSH350IDT Datenblatt(HTML) 16 Page - STMicroelectronics |
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16 / 21 page ![]() TSH350 The Bias of an Inverting Amplifier 16/21 7 The Bias of an Inverting Amplifier A resistance is necessary to achieve a good input biasing, such as resistance R shown in Figure 33. The magnitude of this resistance is calculated by assuming the negative and positive input bias current. The aim is to compensate for the offset bias current, which could affect the input offset voltage and the output DC component. Assuming Ib-, Ib+, Rin, Rfb and a zero volt output, the resistance R will be: Figure 34: Compensation of the input bias current R R in R fb × R in R + fb ----------------------- = R Load Output Rfb Rin Ib- Ib+ Vcc+ Vcc- + _ R Load Output Rfb Rin Ib- Ib+ Vcc+ Vcc- + _ |
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