US 11,868,152 B2
Bandgap reference circuit and electronic device including the same
Hajun Lee, Suwon-si (KR); Jaewook Kwon, Suwon-si (KR); and Hyeongtae Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 20, 2022, as Appl. No. 17/970,026.
Claims priority of application No. 10-2022-0059046 (KR), filed on May 13, 2022.
Prior Publication US 2023/0367350 A1, Nov. 16, 2023
Int. Cl. G05F 3/30 (2006.01); G05F 3/22 (2006.01)
CPC G05F 3/225 (2013.01) [G05F 3/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bandgap reference circuit comprising:
a reference voltage generating circuit configured to
generate a proportional to absolute temperature (PTAT) voltage and a complementary to absolute temperature (CTAT) voltage, the CTAT voltage having a different temperature characteristic from the PTAT voltage, and
generate a reference voltage at an output node based on the PTAT voltage, the CTAT voltage, and a compensation voltage; and
a compensation circuit configured to
generate a CTAT current based on the CTAT voltage, the CTAT current having a different temperature characteristic from the PTAT voltage, and
determine the compensation voltage based on the CTAT current.