US 11,700,012 B2
Digital-to-analog conversion circuit and receiver including the same
Kyeongjoon Ko, Yongin-si (KR); Junhan Bae, Hwaseong-si (KR); Hanseok Kim, Seoul (KR); Byeonggyu Park, Hwaseong-si (KR); Jaehyun Park, Seoul (KR); Hobin Song, Daejeon (KR); and Sooeun Lee, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on May 3, 2021, as Appl. No. 17/306,421.
Claims priority of application No. 10-2020-0149930 (KR), filed on Nov. 11, 2020.
Prior Publication US 2022/0149863 A1, May 12, 2022
Int. Cl. H03M 1/74 (2006.01); H04B 1/16 (2006.01); H04L 25/03 (2006.01); H03M 1/66 (2006.01); H03M 7/16 (2006.01)
CPC H03M 1/742 (2013.01) [H03M 1/66 (2013.01); H03M 7/165 (2013.01); H04B 1/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A digital-to-analog conversion circuit comprising:
a first digital-to-analog converter (DAC) comprising:
a first binary-to-thermometer code converter (BTC) configured to convert a first digital code received through a first input terminal to a first thermometer code;
a plurality of first current cells connected between a first voltage source and a first output node, and configured to provide a first current to the first output node based on the first thermometer code; and
a first current-to-voltage converter directly connected between the first output node and a second voltage source; and
a second DAC comprising:
a second BTC configured to convert a second digital code received through a second input terminal to a second thermometer code;
a plurality of second current cells connected between the first voltage source and the first output node in parallel with the plurality of first current cells, and configured to provide a second current to the first output node based on the second thermometer code; and
a second current-to-voltage converter directly connected between the first output node and the second voltage source in parallel with the first current-to-voltage converter,
wherein the first current-to-voltage converter and the second current-to-voltage converter are configured to convert a sum of the first current and the second current to a first analog voltage corresponding to a weighted sum of the first digital code and the second digital code, and output the first analog voltage at the first output node.