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

Claim 0:
1. A voltage tracking circuit, comprising:
a first transistor in a first well, the first transistor including a first body terminal, a first gate terminal, a first drain terminal and a first source terminal, the first source terminal being coupled to a first voltage supply, the first gate terminal being coupled to a pad voltage terminal and configured to receive a pad voltage, the first body terminal being coupled to the first voltage supply;
a second transistor in a second well different from the first well, and being separated from the first well in a first direction, the second transistor including a second body terminal, a second gate terminal, a second drain terminal and a second source terminal, the second source terminal being coupled to the first drain terminal, the second gate terminal being coupled to the first gate terminal and the pad voltage terminal, and the second body terminal being coupled to at least a first node;
a third transistor including a third gate terminal, a third drain terminal and a third source terminal, the third gate terminal being coupled to the first voltage supply; and
a fourth transistor including a fourth gate terminal, a fourth drain terminal and a fourth source terminal, the fourth drain terminal being coupled to the third source terminal, the fourth gate terminal being coupled to the third gate terminal and the first voltage supply, and the fourth source terminal being coupled to the pad voltage terminal.