Patent ID: 11959960
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 19:
20. A method of operating a pad voltage tracking circuit, comprising:
receiving a pad voltage on a pad voltage terminal, the pad voltage being less than a supply voltage of a first voltage supply;
turning off at least a first set of transistors coupled to the pad voltage terminal, and turning on a second set of transistors coupled to the first voltage supply, a first transistor of the first set of transistors being in a first well, and a second transistor of the second set of transistors being in a second well different from the first well, wherein turning off at least the first set of transistors comprises:
electrically decoupling a first node from the pad voltage terminal by the first set of transistors; and
electrically coupling the first node with the first voltage supply by the second set of transistors.