US2020127614A1PendingUtilityA1

Peak voltage limiting circuits and methods for power amplifiers

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Assignee: SKYWORKS SOLUTIONS INCPriority: Oct 3, 2014Filed: May 7, 2019Published: Apr 23, 2020
Est. expiryOct 3, 2034(~8.2 yrs left)· nominal 20-yr term from priority
Inventors:Anthony Francis QuagliettaJoseph A. CugginoXuanang Zhu
H03F 1/0272H03F 2200/451H03F 3/245H03F 2200/435H03F 3/195H03F 3/19H03F 1/52H03F 2200/408H03F 2200/444H03F 2200/18
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Claims

Abstract

Peak voltage limiting circuits and method for power amplifiers. A power amplifier and/or a voltage limiting circuit includes a diode circuit coupled to an output of an amplification stage, the diode circuit configured to provide a conductive path from the output when an output voltage exceeds a selected value. The power amplifier and/or voltage limiting circuit also includes a sink circuit coupled to the diode circuit and a bias circuit, the sink circuit configured to reduce a bias voltage provided by the bias circuit when the output voltage exceeds the selected value to thereby limit the output voltage.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . A voltage limiting circuit for a power amplifier (PA), comprising:
 a diode circuit coupled to an output of an amplification stage, the diode circuit configured to provide a conductive path from the output when an output voltage exceeds a selected value; and   a sink circuit coupled to the diode circuit and a bias circuit, the sink circuit configured to reduce a bias voltage provided by the bias circuit when the output voltage exceeds the selected value to thereby limit the output voltage.

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