| 摘要 |
PURPOSE: An ADC(Analog-to-Digital Converter) having common capacitors and a common amplifier is provided to secure a stabilized operation by properly regulating the transconductance of the common amplifier. CONSTITUTION: An SHA(Sample-and-Hold Amplifier) and an MDAC(Multiplying D/A Converter) constituting the input terminal of an ADC uses two capacitor rows and one amplifier in common. Unnecessary one of the two capacitor rows is reset according to the operating mode of the ADC. The amplifier has two input terminals, unnecessary one of which is reset according to the operating mode of the ADC. |
