Apparatus for correcting gain error of analog-to-digital converter
A bias generator may include: an operational amplifier, a resister string, and a control circuit. The operational amplifier includes a first input terminal suitable for receiving a bandgap reference voltage, a second input terminal with an offset voltage and an output terminal. The resister string i...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A bias generator may include: an operational amplifier, a resister string, and a control circuit. The operational amplifier includes a first input terminal suitable for receiving a bandgap reference voltage, a second input terminal with an offset voltage and an output terminal. The resister string includes at least one resister coupled between a ground terminal and the output terminal of the operational amplifier, suitable for generating bias voltages. The control circuit is coupled between the second input terminal and the resister string, swaps the offset voltage, and selectively provides the offset voltage and the swapped offset voltage to the second input terminal of the operational amplifier. |
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