Amplifiers with multiple outputs and configurable degeneration inductor
First Claim
1. An apparatus comprising:
- a gain transistor of an amplifier, the gain transistor configured to receive an input signal and to provide an amplified signal, the amplifier configured to provide a single output signal based on a first operating mode and to provide a plurality of output signals based on a second operating mode;
a configurable degeneration inductor coupled to the gain transistor and configured to provide a first source degeneration inductance based on the first operating mode and to provide a second source degeneration inductance based on the second operating mode;
a first transistor coupled to the gain transistor; and
a second transistor coupled to the gain transistor.
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Accused Products
Abstract
Multi-output amplifiers with configurable source degeneration inductance and having good performance are disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit) includes a gain transistor and a configurable degeneration inductor for an amplifier. The gain transistor receives an input signal and provides an amplified signal. The amplifier provides a single output signal in a first operating mode or a plurality of output signals in a second operating mode. The configurable degeneration inductor is coupled to the gain transistor and provides a first source degeneration inductance in the first operating mode or a second source degeneration inductance in the second operating mode. The second source degeneration inductance is less than the first source degeneration inductance and may be dependent on the number of output signals generated in the second operating mode.
36 Citations
20 Claims
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1. An apparatus comprising:
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a gain transistor of an amplifier, the gain transistor configured to receive an input signal and to provide an amplified signal, the amplifier configured to provide a single output signal based on a first operating mode and to provide a plurality of output signals based on a second operating mode; a configurable degeneration inductor coupled to the gain transistor and configured to provide a first source degeneration inductance based on the first operating mode and to provide a second source degeneration inductance based on the second operating mode; a first transistor coupled to the gain transistor; and a second transistor coupled to the gain transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of signal amplification comprising:
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amplifying an input signal based on a first source degeneration inductance and generating a single output signal based on a first operating mode; and amplifying the input signal based on a second source degeneration inductance and generating a plurality of output signals based on a second operating mode. - View Dependent Claims (15, 16, 17)
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18. An apparatus comprising:
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means for amplifying an input signal to provide an amplified signal; means for providing a first source degeneration inductance based on a first operating mode and for providing a second source degeneration inductance based on a second operating mode; means for selectively providing a first output signal based on the amplified signal, the means for selectively providing the first output signal coupled to the means for amplifying; and means for selectively providing a second output signal based on the amplified signal, the means for selectively providing the second output signal coupled to the means for amplifying. - View Dependent Claims (19, 20)
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Specification