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In the case where the power supply +12v is gnd, we need a positive and negative five volt power supply to provide the operational amplifier. In the case of using negative low noise ldo to form -5v, is there a low noise charge pump chip to form + 5 volts, I said that the low noise is uv level. Chips such as 7660 and 1054 cannot meet the requirements, so please provide an ideal circuit or chip, thank you
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