| 摘要 |
PURPOSE: A residue amplifier and an analog digital converter using the same are provided to improve dynamic range of input signal under the lowered source voltage condition. CONSTITUTION: A residual voltage amplifier(210) comprises an operational amplifier, and a capacitor circuit. The operational amplifier is connected to a first internal voltage. The capacitor circuit is connected to another input terminal of the operational amplifier. The capacitor circuit includes a first capacitor(C1), a second capacitor(C2), and a third capacitor. The first capacitor is connected to another input terminal of the operational amplifier. The second capacitor is connected to the common terminal of the first capacitor. The third capacitor is connected to the other input terminal of the operational amplifier. The third capacitor is connected to the output terminal of the operational amplifier.
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