Patent ID: 11863189
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method comprising:
generating a first enabling signal based on comparing an input voltage signal with an upper threshold voltage, wherein generating the first enabling signal includes generating the first enabling signal with an upper threshold circuit in response to a first signal received from a first tracker coupled to the input voltage signal;
controlling a first switch with the first enabling signal, wherein the first switch is electrically connected between an upper supply voltage and a buffer output node;
generating a second enabling signal based on comparing the input voltage signal with a lower threshold voltage, wherein generating the second enabling signal includes generating the second enabling signal with a lower threshold circuit in response to a second signal received from a second tracker coupled to the input voltage signal;
controlling a second switch with the second enabling signal, wherein the second switch is electrically connected between the buffer output node and a lower supply voltage;
controlling at least one switch in a regenerative circuit with a voltage on the buffer output node to change a connection state of the at least one switch between the buffer output node and one of the upper supply voltage or the lower supply voltage; and
changing an output voltage signal from a first voltage level to a second voltage level when each of the first enabling signal and the second enabling signal changes a logical level consecutively.