Apparatus and methods for low noise amplifiers with mid-node impedance networks
AssigneeSkyworks Solutions, Inc.
InventorEngin Ibrahim Pehlivanoglu
Life of this patent
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Abstract
Apparatus and methods for LNAs with mid-node impedance networks are provided herein. In certain configurations, an LNA includes a mid-node impedance circuit including a resistor and a capacitor electrically connected in parallel, a cascode device electrically connected between an output terminal and the mid-node impedance circuit, and a transconductance device electrically connected between the mid-node impedance circuit and ground. The transconductance device amplifies a radio frequency signal received from an input terminal. The LNA further includes a feedback bias circuit electrically connected between the output terminal and the input terminal and operable to control an input bias voltage of the transconductance device.
Claims20
A low noise amplifier comprising:
- a mid-node impedance circuit including a resistor and a capacitor electrically connected in parallel;
- a cascode device electrically connected between an output terminal and the mid-node impedance circuit;
- a transconductance device electrically connected between the mid-node impedance circuit and ground, the transconductance device configured to amplify a radio frequency signal received from an input terminal;
- and
- a feedback bias circuit electrically connected between the output terminal and the input terminal and operable to control an input bias voltage of the transconductance device.
A packaged module comprising:
- a package substrate;
- and
- a semiconductor die attached to the package substrate and including a low noise amplifier fabricated thereon, the low noise amplifier including a mid-node impedance circuit including a resistor and a capacitor electrically connected in parallel, a cascode device electrically connected between an output terminal and the mid-node impedance circuit, a transconductance device electrically connected between the mid-node impedance circuit and ground and configured to amplify a radio frequency signal received from an input terminal, and a feedback bias circuit electrically connected between the output terminal and the input terminal and operable to control an input bias voltage of the transconductance device.
A mobile device comprising:
- an antenna;
- a front end system including a low noise amplifier having an input terminal configured to receive a radio frequency signal from the antenna and an output terminal configured to output an amplified radio frequency signal, the low noise amplifier including a mid-node impedance circuit including a resistor and a capacitor electrically connected in parallel, a cascode device electrically connected between the output terminal and the mid-node impedance circuit, a transconductance device electrically connected between the mid-node impedance circuit and ground and configured to amplify the radio frequency signal, and a feedback bias circuit electrically connected between the output terminal and the input terminal and operable to control an input bias voltage of the transconductance device;
- and
- a transceiver configured to receive the amplified radio frequency signal.
Dependencies are inferred from the claim text.