Patent ID: 6838909

Claim:
A bulk input differential logic circuit comprising: first and second transistors of a first type having sources commonly coupled to receive a first voltage, drains commonly coupled to a first output terminal and gates respectively coupled to receive a first signal and a second output terminal; third and fourth transistors of the first type having sources commonly coupled to receive the first voltage, drains commonly coupled to the second output terminal and gates respectively coupled to receive the first signal and the first output terminal; first and second transistors of a second type having drains respectively coupled to the first and second output terminal, gates respectively coupled to the second and first output terminal; a third transistor of the second type having a source coupled to receive a second voltage and a gate coupled to receive the first signal; at least one fourth transistor of the second type having a gate coupled to receive at least one second signal, a bulk coupled to receive at least one fourth signal, a drain coupled to the sources of the first and second transistors of the second type, and a source coupled to the drain of the third transistor of the second type; at least one fifth transistor of the second type having a gate coupled to receive at least one third signal, a bulk coupled to receive at least one fifth signal, a drain coupled to the sources of the first and second transistors of the second type, and a source coupled to the drain of the third transistor of the second type; and wherein the first and fourth transistors of the second type are serially connected to form a first current path, the second and fifth transistors of the second type are serially connected to form a second current path, magnitudes of a first and second currents flowing through the first and second current paths are determined by the second and fourth signals, and the third and fifth signals, respectively, the second signal differs from the third signal, and the fourth signal differs from the fifth signal.