Patent ID: 7176736

Claim:
A method of changing the output of a latch circuit, the output having a first state and a second state, the latch circuit comprising a SET transistor and a RESET transistor, the method comprising; at the first state, conducting a first current in a first latch transistor and a SET transistor, said first latch transistor having a base coupled by a resistive element to the base of the SET transistor, and using a portion of the first current to bias the SET transistor at an operational point lower than a first threshold; at the second state, conducting the first current in a second latch transistor and a RESET transistor, said second latch transistor having a base coupled by a resistive element to the base of the RESET transistor, and using a portion of the first current to bias the RESET transistor at an operational point lower than a second threshold; to vary the output from the first state to the second state, providing a second current that raises the base of the SET transistor to the first threshold; and to vary the output from the second state to the first state, providing the second current that raises the base of the RESET transistor to the second threshold.