High gain amplifier circuits and their applications
AssigneeIntel Corporation
InventorJames E. Jaussi
Life of this patent
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Abstract
A high gain amplifier circuit includes two differential transistor pairs and a current generator coupled to each differential pair to control tail current. Each differential transistor pair has a first transistor and a second transistor and an output node for each. Bias terminals of the first transistors serve as inputs for the amplifier circuit. The output node of each first transistor serves as an output for the amplifier circuit and is respectively coupled to the bias terminal of the second transistor of the same differential pair. The amplifier circuit has applications in a comparator circuit that also has a load circuit, which may have active components or only passive components. The amplifier circuit may also be used as a sense amplifier in a receiver of a communications system.
Claims13
An amplifier circuit comprising:
- first and second transistor pairs, each pair having a first transistor and a second transistor of like conductivity type and a bias terminal and an output node for each transistor, wherein the bias terminals are gate terminals, and the output nodes of the first transistors being respectively coupled to the bias terminals of the second transistors for positive feedback in gain;
- and
- first and second current generators to control respective tail currents of the first and second pairs.
Dependencies are inferred from the claim text.