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US 9,866,177 B2Granted
System and method for a low noise amplifier
AssigneeInfineon Technologies AG
InventorsDaniel Kehrer, Paulo Oliveira, Thomas Leitner
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Abstract
An embodiment described herein includes a low noise amplifier (LNA) including a plurality of separate input terminals, a plurality of transistors, and an output network coupled to a first reference terminal and a single output of the LNA. Each transistor includes a conduction path and a control terminal coupled to one of the plurality of separate input terminals. The output network is also coupled to the conduction path of each of the plurality of transistors.
Claims24
A low noise amplifier (LNA) comprising:
- a plurality of separate input terminals;
- a plurality of transistors, wherein each transistor comprises:
- a conduction path, and
- a control terminal coupled to one of the plurality of separate input terminals;
- an output network coupled to a first reference terminal, the conduction path of each of the plurality of transistors, and a single output of the LNA, wherein the output network comprises a plurality of matching networks, each matching network of the plurality of matching networks is coupled between the single output of the LNA and the conduction path of a corresponding transistor of the plurality of transistors, and each matching network of the plurality of matching networks comprises a different passband;
- and
- a degeneration element having a first end coupled to a second reference terminal and a second end coupled to the conduction path of each of the plurality of transistors.
4 more elements
A method of operating a low noise amplifier (LNA), the method comprising:
- receiving a first signal at a first input terminal of a plurality of separate input terminals of the LNA;
- receiving a second signal at a second input terminal of the plurality of separate input terminals of the LNA;
- amplifying the first signal at a first transistor of a plurality of transistors of the LNA;
- amplifying the second signal at a second transistor of a plurality of transistors of the LNA;
- combining the first and second signals at a shared output line of the LNA, the shared output line being coupled to conduction terminals of the first and second transistors;
- and
- supplying the first and second signals to a processing circuit on a single coupling line coupled to the shared output line, wherein the LNA further comprises
- an output matching network coupled to a first reference terminal, a conduction path of each of the plurality of transistors, and the shared output line, wherein the output matching network comprises a plurality of matching networks, each matching network of the plurality of matching networks is coupled between the shared output line and a conduction terminal of a corresponding transistor of the plurality of transistors, and each matching network of the plurality of matching networks comprises a different passband, and
- a degeneration element having a first end coupled to a second reference terminal and a second end coupled to the conduction path of each of the plurality of transistors.
6 more elements
A low noise amplifier (LNA) comprising:
- a plurality of separate input terminals;
- a plurality of transistors, wherein each transistor comprises:
- a conduction path, and
- a control terminal coupled to one of the plurality of separate input terminals;
- and
- an output network comprising a plurality of matching networks, each matching network of the plurality of matching networks comprising:
- an LC tank having a first tank terminal coupled to a first reference terminal, a second tank terminal coupled to the conduction path of a corresponding transistor of the of the plurality of transistors, and
- an LC network coupled between the LC tank and a single output of the LNA.
5 more elements
Dependencies are inferred from the claim text.