Multi-band, inductor re-use low noise amplifier
First Claim
1. A low noise amplifier (LNA), comprising:
- a common source transistor configured to amplify an input signal having a frequency in a narrowband (NB);
a common gate transistor configured to amplify an input signal having a frequency in a wideband (WB); and
an impedance matching network coupled to the common source transistor and the common gate transistor, wherein the impedance matching network is configured to reuse at least one inductor to provide input impedance matching for the common source transistor in the NB and the common gate transistor in the WB.
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Accused Products
Abstract
Described herein are multi-band LNAs that reuse inductors for different frequency bands to minimize chip area. In an embodiment, a multi-band LNA is capable of operating in a narrowband (NB) and a wideband (WB) while reusing at least one input impedance matching inductor and at least one load inductor for both bands. The reuse of inductors results in a more efficient use of chip area. In an exemplary embodiment, the LNA comprises a common source transistor and a common gate transistor. In this embodiment, the LNA operates in a common source configuration using the common source transistor to amplify input signals in the NB, and operates in a common gate configuration using the common gate transistor to amplify input signals in the WB. The LNA reuses an input impedance matching inductor and a load inductor in both configurations, and thus both bands.
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Citations
23 Claims
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1. A low noise amplifier (LNA), comprising:
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a common source transistor configured to amplify an input signal having a frequency in a narrowband (NB); a common gate transistor configured to amplify an input signal having a frequency in a wideband (WB); and an impedance matching network coupled to the common source transistor and the common gate transistor, wherein the impedance matching network is configured to reuse at least one inductor to provide input impedance matching for the common source transistor in the NB and the common gate transistor in the WB. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A low noise amplifier (LNA), comprising:
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a common source transistor adapted to amplify an input signal having a frequency in a narrowband (NB); a common gate transistor adapted to amplify an input signal having a frequency in a wideband (WB); and a load network coupled to the common source transistor and the common gate transistor, wherein the load network is configured to reuse a load inductor to resonant at a frequency in the NB and a frequency in the WB. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification