Patent ID: 7535264
Filing Date: 2009-05-19
Classification: H03F

Abstract:
1. In a circuit comprising a first current conveyor circuit including a first X leg that includes a first X terminal, and a second current conveyor circuit including a second X leg that includes a second X terminal, a method for comparing currents, the method comprising: driving a first current through the first X leg; driving a second current through the second X leg; draining a third current from the first X terminal to produce a first positive transistor current and a first negative transistor current; draining a fourth current from the second X terminal to produce a second positive transistor current and a second negative transistor current; summing the first positive transistor current and the second negative transistor current to produce a first current output; summing the first negative transistor current and the second positive transistor current to produce a second current output; and summing the first current output and the second current output to produce a summed current output.