Invention Grant
- Patent Title: Bandgap reference circuit including resistivity temperature coefficient cancellation circuit, and oscillator circuit including the bandgap reference circuit
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Application No.: US17702482Application Date: 2022-03-23
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Publication No.: US11789482B2Publication Date: 2023-10-17
- Inventor: Jusung Lee , Wooseok Kim , Taeik Kim , Chanyoung Jeong
- Applicant: SAMSUNG ELECTRONICS CO., LTD.
- Applicant Address: KR Suwon-si
- Assignee: SAMSUNG ELECTRONICS CO., LTD.
- Current Assignee: SAMSUNG ELECTRONICS CO., LTD.
- Current Assignee Address: KR Suwon-si
- Agency: F. Chau & Associates, LLC
- Priority: KR 20210039841 2021.03.26
- Main IPC: G05F3/30
- IPC: G05F3/30 ; H03K3/011 ; H03K5/24 ; G05F1/56

Abstract:
A bandgap reference circuit includes a reference current generation circuit configured to output a bandgap reference current insensitive to a temperature change, by using a first voltage inversely proportional to temperature and a third voltage proportional to temperature. The third voltage is a difference between the first voltage and a second voltage. The bandgap reference circuit further includes a resistivity temperature coefficient cancellation circuit configured to remove a first current proportional to temperature from the bandgap reference current by using the third voltage, and a reference voltage generation circuit configured to output a bandgap reference voltage insensitive to a temperature change by using a second current inversely proportional to temperature and a first resistance proportional to temperature. The second current is generated by removing the first current from the bandgap reference current.
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