| 摘要 |
PURPOSE: An analog-to-digital converting circuit is provided to optimize an analog-to-digital conversion time. CONSTITUTION: An analog-to-digital converting circuit comprises a plurality of analog switches, which selects and outputs one of voltages(V0.8,V1.4,V2.2,V3.1) in response to a 3-bit SAR input signal(SAR£1:3|) of a 4-bit SAR input signal(SAR£1:4|) from an SAR register and a signal(ST£1:4|) indicating a conversion cycle from a digital-to-analog conversion to an analog-to-digital conversion. In an analog-to-digital converting circuit, a final path is previously determined by use of a value of a previously determined SAR register.
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