Stability in power amplifiers under high in-band voltage standing wave ratio condition
AssigneeSkyworks Solutions, Inc.
InventorsKunal Datta, Khaled A. Fayed, Edward James Anthony, Srivatsan Jayaraman
Life of this patent
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Abstract
In some embodiments, stability in power amplifiers can be achieved under high in-band voltage standing wave ratio condition, with an amplifier circuit that includes an amplifier having a first stage and a second stage, with each stage including an input and an output, such that the output of the first stage is coupled to the input of the second stage. The amplifier circuit further includes a stabilizing circuit implemented on the input side of the second stage and configured to provide stability in operation of the amplifier under a high in-band voltage standing wave ratio condition.
Claims16
An amplifier circuit comprising:
- an amplifier having a first stage and a second stage, each stage including an input and an output, such that the output of the first stage is coupled to the input of the second stage, the second stage being an output stage and the first stage being a stage immediately preceding the output stage;
- and
- a stabilizing circuit implemented on the input side of the second stage and configured to provide stability in operation of the amplifier under a high in-band voltage standing wave ratio condition.
An amplifier circuit comprising:
- an amplifier having a first stage and a second stage, each stage including an input and an output, such that the output of the first stage is coupled to the input of the second stage, the first stage including a first amplifier transistor, and the second stage including a second amplifier transistor, such that the output of the first amplifier transistor is coupled to the input of the second amplifier transistor, each of the first and second amplifier transistors implemented as a bipolar-junction transistor having a base as the input and a collector as the output;
- and
- a stabilizing circuit implemented on the input side of the second stage and configured to provide stability in operation of the amplifier under a high in-band voltage standing wave ratio condition, the stabilizing circuit including one or more of a harmonic trap coupled to the base of the second amplifier transistor, a spur-reduction network implemented between the first and second amplifier transistors, and a resistance implemented to be electrically parallel with a choke inductance that couples the collector of the first amplifier transistor to a supply voltage node.
A semiconductor die comprising:
- a semiconductor substrate;
- and
- an amplifier circuit implemented on the semiconductor substrate, the amplifier circuit including an amplifier having a first stage and a second stage, each stage including an input and an output, such that the output of the first stage is coupled to the input of the second stage, the second stage being an output stage and the first stage being a stage immediately preceding the output stage, the amplifier circuit further including a stabilizing circuit implemented on the input side of the second stage and configured to provide stability in operation of the amplifier under a high in-band voltage standing wave ratio condition.
A packaged module comprising:
- a packaging substrate configured to receive a plurality of components;
- and
- an amplifier circuit implemented on the packaging substrate, the amplifier circuit including an amplifier having a first stage and a second stage, each stage including an input and an output, such that the output of the first stage is coupled to the input of the second stage, the second stage being an output stage and the first stage being a stage immediately preceding the output stage, the amplifier circuit further including a stabilizing circuit implemented on the input side of the second stage and configured to provide stability in operation of the amplifier under a high in-band voltage standing wave ratio condition.
Dependencies are inferred from the claim text.