CPC H03M 1/468 (2013.01) [H03M 1/08 (2013.01); H03M 1/462 (2013.01)] | 17 Claims |
1. An analog-to-digital converting circuit for converting an analog signal into a digital signal, the analog-to-digital converting circuit comprising:
a plurality of reference voltage generators each configured to generate a reference voltage;
an analog-to-digital converter configured to
generate a comparison voltage based on the reference voltage and the analog signal, and
generate the digital signal corresponding to the analog signal based on a result of comparing the comparison voltage with a common voltage; and
a plurality of decoupling capacitors connected to the plurality of reference voltage generators, respectively,
wherein at least one of the plurality of decoupling capacitors is connected to the analog-to-digital converter in each of a plurality of time periods,
wherein the plurality of time periods includes a first conversion period and a second conversion period after the first conversion period,
wherein the plurality of decoupling capacitors comprises
a first decoupling capacitor configured to provide charges to the analog-to-digital converter in the first conversion period, and
a second decoupling capacitor configured to provide charges to the analog-to-digital converter in the second conversion period, and
wherein the charges provided during the second conversion period are smaller than the charges provided during the first conversion period.
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