Patent ID: 6509794
Filing Date: 2003-01-21
Classification: H03F

Abstract:
A rail-to-rail dynamically controlled amplifier circuit comprising:a first difference circuit that comprises a first primary pair of transistors, a first crossover pair of transistors running in parallel with the first primary pair of transistors, and a first current source coupled to the first primary pair of transistors and the first crossover pair of transistors; a second difference circuit that comprises a second primary pair of transistors, a second crossover pair of transistors running in parallel with the second primary pair of transistors, and a second current source coupled to the second primary pair of transistors and the second crossover pair of transistors; an upper voltage supply coupled to the first difference circuit and the second difference circuit; a lower voltage supply coupled to the first difference circuit and the second difference circuit; and a pair of input lines, wherein the input lines are coupled to control electrodes of the first primary pair of transistors and control electrodes of the second primary pair of transistors; wherein an output of the first primary pair of transistors is coupled to control electrodes of the second crossover pair of transistors and an output of the second primary pair of transistors is coupled to control electrodes of the first crossover pair of transistors.