US 10,637,412 B2 · Apparatus and methods for low noise amplifiers

Abstract

Apparatus and methods for low noise amplifiers (LNAs) are provided herein. In certain configurations, an LNA includes a mode control circuit that operates the LNA in one of a plurality of modes including a gain mode and a bypass mode, a gain circuit electrically connected between an input terminal and an output terminal and operable to amplify a radio frequency signal received from the input terminal in the gain mode, and a bypass circuit electrically connected between the input terminal and the output terminal and operable to bypass the gain circuit in the bypass mode. The bypass circuit includes a balun that provides a first amount of compensation for a difference in phase delay between the bypass circuit and the gain circuit, and the LNA further includes a phase compensation circuit operable to provide a second amount of compensation for the difference in phase delay.

Claims20

Dependent claims

A low noise amplifier comprising:

a mode control circuit configured to operate the low noise amplifier in one of a plurality of modes including a gain mode and a bypass mode;
a gain circuit electrically connected between an input terminal and an output terminal and operable to amplify a radio frequency signal received from the input terminal in the gain mode;
a bypass circuit electrically connected between the input terminal and the output terminal and operable to bypass the gain circuit in the bypass mode, the bypass circuit including a balun operable to provide a first amount of compensation for a difference in phase delay between the bypass circuit and the gain circuit;
and
a phase compensation circuit operable to provide a second amount of compensation for the difference in phase delay.

2 more elements

Dependencies are inferred from the claim text.

Apparatus and methods for low noise amplifiers

Life of this patent

Apparatus and methods for low noise amplifiers

Life of this patent

Abstract

Claims20