US 12,191,860 B2
Level shifter circuit and method of operating the same
Jing Ding, Hsinchu (TW); Zhang-Ying Yan, Hsinchu (TW); Qingchao Meng, Hsinchu (TW); and Lei Pan, Hsinchu (TW)
Assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW); TSMC NANJING COMPANY, LIMITED, Nanjing (CN); and TSMC CHINA COMPANY, LIMITED, Shanghai (CN)
Filed by TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD., Hsinchu (TW); TSMC CHINA COMPANY, LIMITED, Shanghai (CN); and TSMC NANJING COMPANY, LIMITED, Nanjing (CN)
Filed on Dec. 12, 2023, as Appl. No. 18/536,552.
Application 18/536,552 is a continuation of application No. 17/736,913, filed on May 4, 2022, granted, now 11,843,382, issued on Dec. 12, 2023.
Claims priority of application No. 202210246446.7 (CN), filed on Mar. 14, 2022.
Prior Publication US 2024/0128956 A1, Apr. 18, 2024
Int. Cl. H03K 3/037 (2006.01); G06F 30/392 (2020.01); H03K 19/0185 (2006.01)
CPC H03K 3/037 (2013.01) [G06F 30/392 (2020.01); H03K 19/018521 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An integrated circuit comprising:
a first region comprising:
a first set of transistors comprising:
a first set of active regions having a first threshold voltage, the first set of transistors in an input circuit, the input circuit being coupled to a first voltage supply, and configured to receive a first input signal, and to generate at least a second input signal or a third input signal;
a second region adjacent to the first region, the second region comprising:
a second set of transistors comprising:
a second set of active regions having a second threshold voltage, the second set of transistors in a first portion of a level shifter circuit a header circuit and an enable circuit, the first portion of the level shifter circuit being coupled to at least the input circuit and a second voltage supply different from the first voltage supply; and
a third region adjacent to the first region, the third region comprising:
a third set of transistors comprising:
a third set of active regions having a third threshold voltage different from the first threshold voltage and the second threshold voltage, and the third set of transistors in a second portion of the level shifter circuit.