Radio frequency signal splitting with differential filter and low noise amplifiers
AssigneeSkyworks Solutions, Inc.
InventorDavid Richard Pehlke
Life of this patent
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Abstract
Apparatus and methods for radio frequency (RF) signal splitting are disclosed. In certain embodiments, a front-end system includes a filter that filters an RF receive signal to generate a differential filtered RF signal between a first output and a second output, a first low noise amplifier (LNA) that generates a first amplified RF signal by amplifying a first component of the differential filtered RF signal received from the first output, a second LNA that generates a second amplified RF signal by amplifying a second component of the differential filtered RF signal received from the second output, a first multi-throw switch that receives the first amplified RF signal, and a second multi-throw switch that receives the second amplified RF signal.
Claims20
A mobile device comprising:
- an antenna configured to receive a radio frequency receive signal;
- and
- a front-end system including a filter configured to receive the radio frequency receive signal from the antenna and to generate a differential filtered radio frequency signal, a first low noise amplifier having an input configured to receive a non-inverted component of the differential filtered radio frequency signal and an output providing an amplified non-inverted component, a second low noise amplifier having an input configured to receive an inverted component of the differential filtered radio frequency signal and an output providing an amplified inverted component, a first multi-throw switch, a second multi-throw switch, a third multi-throw switch, a fourth multi-throw switch, and a balun having a primary section connected between the output of the first low noise amplifier and the output of the second low noise amplifier, a first secondary section connected between an input of the first multi-throw switch and an input of the second multi-throw switch, and a second secondary section connected between an input of the third multi-throw switch and an input of the fourth multi-throw switch.
A method of radio frequency signal splitting in a mobile device, the method comprising:
- filtering a radio frequency receive signal using a filter to generate a differential filtered radio frequency signal;
- amplifying a non-inverted component of the differential filtered radio frequency signal received at an input of a first low noise amplifier to generate an amplified non-inverted component at an output of the first low noise amplifier;
- amplifying an inverted component of the differential filtered radio frequency signal received at an input of a second low noise amplifier to generate an amplified inverted component at an output of the second low noise amplifier;
- and
- providing the amplified non-inverted component and the amplified inverted component to a primary section of a balun, the primary section of the balun connected
- between the output of the first low noise amplifier and the output of the second low noise amplifier, a first secondary section of the balun connected between an input of a first multi-throw switch and an input of a second multi-throw switch, and a second secondary section of the balun connected between an input of a third multi-throw switch and an input of a fourth multi-throw switch.
A front-end system comprising:
- a filter configured to receive a radio frequency receive signal and to generate a differential filtered radio frequency signal;
- a first low noise amplifier having an input configured to receive a non-inverted component of the differential filtered radio frequency signal and an output configured to provide an amplified non-inverted component, and a second low noise amplifier having an input configured to receive an inverted component of the differential filtered radio frequency signal and an output configured to provide an amplified inverted component;
- a first multi-throw switch, a second multi-throw switch, a third multi-throw switch, and a fourth multi-throw switch;
- and
- a balun having a primary section connected between an output of the first low noise amplifier and an output of the second low noise amplifier, a first secondary section connected between an input of the first multi-throw switch and an input of the second multi-throw switch, and a second secondary section connected between an input of the third multi-throw switch and an input of the fourth multi-throw switch.
Dependencies are inferred from the claim text.