US 12,345,762 B2
Built-in self-test circuit and temperature measurement circuit including the same
Junhee Shin, Yongin-Si (KR); Jooseong Kim, Seoul (KR); Yongjin Lee, Goyang-si (KR); Michael Choi, Seoul (KR); Kwangho Kim, Yongin-si (KR); and Sangho Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on May 16, 2023, as Appl. No. 18/318,464.
Application 18/318,464 is a continuation of application No. 16/940,809, filed on Jul. 28, 2020, granted, now 11,686,766.
Claims priority of application No. 10-2019-0175903 (KR), filed on Dec. 27, 2019.
Prior Publication US 2023/0280398 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 31/317 (2006.01); G01R 31/28 (2006.01); G01R 31/30 (2006.01); G01R 31/3167 (2006.01); G01R 31/319 (2006.01); G01R 31/327 (2006.01); H03K 19/017 (2006.01)
CPC G01R 31/31724 (2013.01) [G01R 31/2874 (2013.01); G01R 31/3004 (2013.01); G01R 31/3167 (2013.01); G01R 31/31924 (2013.01); G01R 31/3274 (2013.01); H03K 19/01721 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A temperature measurement circuit comprising:
a band-gap reference circuit configured to generate a band-gap reference voltage that is fixed regardless of an operation temperature;
a reference voltage generator circuit configured to generate a measurement reference voltage by adjusting the band-gap reference voltage;
a sensing circuit configured to generate a temperature-variant voltage based on a bias current, wherein the temperature-variant voltage varies depending on the operation temperature;
an analog-digital converter circuit configured to generate a first digital code indicating the operation temperature based on the measurement reference voltage and the temperature-variant voltage; and
a digital built-in self-test (BIST) circuit configured to
apply a test signal to the analog-digital converter circuit,
receive a second digital code from the analog-digital converter circuit, and
generate a plurality of alarm signals based on the second digital code, wherein the plurality of alarm signals indicate an operation state of the analog-digital converter circuit.