Doherty radio frequency amplifier circuitry
AssigneeQorvo US, Inc.
InventorsBaker Scott, George Maxim, Dirk Robert Walter Leipold
Life of this patent
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Abstract
Doherty radio frequency (RF) amplifier circuitry includes an input node, an output node, a main amplifier path, and a peaking amplifier path. The main amplifier path is coupled between the input node and the output node and includes a main amplifier. The peaking amplifier path is coupled in parallel with the main amplifier path between the input node and the output node, and includes a peaking amplifier and a peaking variable gain preamplifier between the input node and the peaking amplifier. The peaking variable gain preamplifier is configured to adjust a current provided to the peaking amplifier.
Claims20
Doherty radio frequency (RF) amplifier circuitry comprising:
- an input coupler configured to receive one or more RF input signals;
- an output coupler configured to output one or more RF output signals;
- a main amplifier path between the input coupler and the output coupler, the main amplifier path comprising a main amplifier;
- a peaking amplifier path between the input coupler and the output coupler, the peaking amplifier path comprising:
- a peaking amplifier;
- and
- a peaking variable gain preamplifier between the input coupler and the peaking amplifier, the peaking variable gain preamplifier configured to adjust a current provided to the peaking amplifier;
- and
- control circuitry configured to adjust a gain of the peaking variable gain preamplifier to compensate for parasitic impedance of the main amplifier and the peaking amplifier.
Doherty radio frequency (RF) amplifier circuitry comprising:
- an input coupler configured to receive one or more RF input signals;
- an output coupler configured to output one or more RF output signals;
- a main amplifier path between the input coupler and the output coupler, the main amplifier path comprising a main amplifier;
- a peaking amplifier path between the input coupler and the output coupler, the peaking amplifier path comprising:
- a peaking amplifier;
- and
- a peaking variable gain preamplifier between the input coupler and the peaking amplifier, the peaking variable gain preamplifier configured to adjust a current provided to the peaking amplifier;
- and
- control circuitry configured to:
- detect a saturation condition of the main amplifier;
- and
- adjust a gain of the peaking variable gain preamplifier based on the detection of the saturation condition.
Doherty radio frequency (RF) amplifier circuitry comprising:
- an input coupler configured to receive one or more RF input signals;
- an output coupler configured to output one or more RF output signals;
- a main amplifier path between the input coupler and the output coupler, the main amplifier path comprising a main amplifier;
- a peaking amplifier path between the input coupler and the output coupler, the peaking amplifier path comprising:
- a peaking amplifier;
- and
- a peaking variable gain preamplifier between the input coupler and the peaking amplifier, the peaking variable gain preamplifier configured to adjust a current provided to the peaking amplifier;
- and
- control circuitry comprising one of a feedback loop or a feedforward loop, wherein the control circuitry is configured to adjust a gain of the peaking variable gain preamplifier based on the one of the feedback loop or the feedforward loop.
Dependencies are inferred from the claim text.