Patent ID: 7375590

Claim:
A single-ended input to differential-ended output low noise amplifier implemented with cascode and cascade topology, the low noise amplifier comprising: a first transistor; a first inductive impedance having a first terminal connected to the source of the first transistor, and a second terminal coupled to ground; a first gate voltage source coupled to the gate of the first transistor; a matching circuit having a first terminal coupled to the gate of the first transistor; an input coupled to a third terminal of the matching circuit; a second inductive impedance having a first terminal connected to the drain of the first transistor; a second transistor, the source of the second transistor connected to a second terminal of the second inductive impedance; a first capacitive impedance having a first terminal connected to the drain of the first transistor, and a second terminal connected to the gate of the second transistor; a second gate voltage source coupled to the gate of the second transistor; a third transistor, the source of the third transistor connected to the drain of the first transistor; a third gate voltage source coupled to the gate of the third transistor; a second capacitive impedance having a first terminal connected to the gate of the third transistor, and a second terminal connected to ground; a first output impedance having a first terminal connected to the drain of the second transistor; a second output impedance having a first terminal connected to the drain of the third transistor; a direct current voltage source connected to a second terminal of the first impedance and a second terminal of the second impedance; a first output connected to the drain of the second transistor; and a second output connected to the drain of the third transistor.