US 11,916,562 B2
Current steering digital-to-analog converter and integrated circuit including the same
Youngsea Cho, Seongnam-si (KR); Wan Kim, Hwaseong-si (KR); Jiseon Paek, Suwon-si (KR); and Seunghyun Oh, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 16, 2022, as Appl. No. 17/673,127.
Claims priority of application No. 10-2021-0062159 (KR), filed on May 13, 2021.
Prior Publication US 2022/0368337 A1, Nov. 17, 2022
Int. Cl. H03M 1/38 (2006.01); H03M 1/06 (2006.01); H03M 1/66 (2006.01)
CPC H03M 1/0617 (2013.01) [H03M 1/38 (2013.01); H03M 1/66 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A current steering digital-to-analog converter comprising:
a plurality of current cells each including a current source circuit and a current switch circuit to selectively output a current in response to a first input signal corresponding to a digital signal;
a dummy current cell including a dummy current source circuit and a dummy current switch circuit to output a current in response to a second input signal; and
a current switch bias circuit coupled to the dummy current cell and configured to generate a first bias voltage that tracks a first voltage of an internal node of the dummy current source circuit and is applied to the current switch circuit,
wherein the current switch bias circuit adjusts a level of the first bias voltage such that a difference between the first bias voltage and the first voltage is constant.