Patent ID: 8675433

Claim:
A circuit comprising: a first node configured to receive a first operational voltage; a second node configured to receive a second operational voltage, the second operational voltage being greater than the first operational voltage; a sense amplifier having a first supply voltage node and a second supply voltage node; at least one first transistor having at least one first drain, at least one first source, and at least one first gate, the at least one first drain coupled to the first supply voltage node, the at least one first source configured to receive the first operational voltage; at least one second transistor having at least one second drain, at least one second source, and at least one second gate, the at least one second drain coupled to the second supply voltage node, the at least one second source configured to receive the second operational voltage; and at least one of a first control circuit configured to generate a first control signal for the at least one first gate, the first control signal capable of having a first voltage level lower than the first operational voltage; or a second control circuit configured to generate a second control signal for the at least one second gate, the second control signal capable of having a second voltage level higher than the second operational voltage, wherein the circuit is configured to meet at least one of the following conditions: a first number of first transistors of the at least one first transistor is selected based on a first current leakage through the at least one first transistor when the first voltage level of the first control signal is less than the first operational voltage; or a second number of second transistors of the at least one second transistor is selected based on a second current leakage through the at least one second transistor when the second voltage level of the second control signal is greater than the second operational voltage.