Patent ID: 11888452
Assignee: SKYWORKS SOLUTIONS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An amplifier circuit comprising:
an input node and an output node;
an amplifier implemented between the input node and the output node;
a bias circuit configured to provide a bias signal to the amplifier; and
a protection circuit configured to generate a detected voltage representative of a peak of a radio-frequency signal present at the input node, the protection circuit further configured to enable a protection mode when the detected voltage is greater than a first threshold value and to disable the protection mode when the detected voltage is less than a second threshold value that is less than the first threshold value, the protection circuit including a detector coupled to the input node to allow sampling of the radio-frequency signal, the detector configured to generate the detected voltage based on the peak of the sampled radio-frequency signal, the detector including a diode configured to limit a current associated with the sampled radio-frequency signal in one direction, and a resistance-capacitance circuit configured to generate the detected voltage, the resistance-capacitance circuit including a parallel arrangement of a resistance and a capacitance between an output of the diode and ground.