US 12,282,351 B2
Bandgap reference circuit
Jaw-Juinn Horng, Hsinchu (TW); Chin-Ho Chang, Hsinchu (TW); and Yi-Wen Chen, Hsinchu (TW)
Assigned to Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed by Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu (TW)
Filed on Mar. 27, 2023, as Appl. No. 18/190,402.
Application 18/190,402 is a continuation of application No. 17/396,981, filed on Aug. 9, 2021, granted, now 11,614,764.
Application 17/396,981 is a continuation of application No. 16/682,683, filed on Nov. 13, 2019, granted, now 11,086,348, issued on Aug. 10, 2021.
Application 16/682,683 is a continuation of application No. 16/195,176, filed on Nov. 19, 2018, granted, now 10,520,972, issued on Dec. 31, 2019.
Claims priority of provisional application 62/592,544, filed on Nov. 30, 2017.
Prior Publication US 2023/0229186 A1, Jul. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G05F 3/26 (2006.01); G05F 3/30 (2006.01)
CPC G05F 3/267 (2013.01) [G05F 3/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Band Gap Reference (BGR) circuit, comprising:
a first node, a second node, a third node, a fourth node, and a first resistive element connected between the second node and the third node, and wherein the BGR circuit is operative to provide a reference voltage as an output at the fourth node; and
a shunt current path connected between the first node and the third node, wherein the shunt current path comprises a second resistive element and a first amplifier connected to the second resistive element, wherein the first amplifier is connected to the second resistive element in a negative feedback, and wherein the shunt current path is operative to sink a shunt current to the first node.