US 11,984,907 B2
Analog-to-digital converting circuit receiving reference voltage from alternatively switched reference voltage generators and reference voltage capacitors and operating method thereof
Yong Lim, Seoul (KR); and Jaehoon Lee, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 29, 2021, as Appl. No. 17/564,668.
Claims priority of application No. 10-2021-0009741 (KR), filed on Jan. 22, 2021; and application No. 10-2021-0058820 (KR), filed on May 6, 2021.
Prior Publication US 2022/0239310 A1, Jul. 28, 2022
Int. Cl. H03M 1/12 (2006.01); H03M 1/08 (2006.01); H03M 1/46 (2006.01)
CPC H03M 1/468 (2013.01) [H03M 1/08 (2013.01); H03M 1/462 (2013.01)] 17 Claims
OG exemplary drawing
 
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.