US 2023/0412130 A1 · FRONT-END CIRCUITRY WITH AMPLIFIER PROTECTION

Abstract

Methods and apparatus for providing amplifier protection for a radio frequency (RF) front-end circuit. An example RF front-end circuit generally includes an amplifier with a gain, a first sensor configured to sense a first power (or voltage) of a first node coupled to an input of the amplifier, a second sensor configured to sense a second power (or voltage) of a second node coupled to an output of the amplifier, and logic coupled to the first and second sensors. The logic is generally configured to determine that the second power (or voltage) is outside a range based on the gain and the first power (or voltage) and to take an action to protect the amplifier based on the determination. By utilizing the techniques and apparatus described herein, protection can be provided to the amplifier(s) in an RF front-end circuit without significantly impacting the performance of the RF front-end circuit.

Claims22

Dependent claims

A radio frequency front-end circuit comprising:

a power amplifier configured to amplify an input signal with a gain;
a first sensor coupled to a first node coupled to an input of the power amplifier and configured to sense at least one of a first power or a first voltage of the first node;
a second sensor coupled to a second node coupled to an output of the power amplifier and configured to sense at least one of a second power or a second voltage of the second node;
and
logic coupled to the first sensor and the second sensor and configured to:
determine that the at least one of the second power or the second voltage is outside a range based on the gain and the at least one of the first power or the first voltage;
and
take an action to protect the power amplifier based on the determination.

5 more elements

Dependencies are inferred from the claim text.

Front-end circuitry with amplifier protection

Life of this patent

Front-end circuitry with amplifier protection

Life of this patent

Abstract

Claims22