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US 12,587,224 B2Granted
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 filter the radio frequency receive signal to generate a differential filtered radio frequency signal between a first output and a second output, a first low noise amplifier configured to generate a first amplified radio frequency signal by amplifying a first component of the differential filtered radio frequency signal received from the first output, a second low noise amplifier configured to generate a second amplified radio frequency signal by amplifying a second component of the differential filtered radio frequency signal received from the second output, a first multi-throw switch having an input configured to receive the first amplified radio frequency signal, a second multi-throw switch having an input configured to receive the second amplified radio frequency signal, a balun including a primary section connected between a first output of the first multi-throw switch and a first output of the second multi-throw switch and having a center tap connected to a first power supply voltage, a first supply inductor connected between a second output of the first multi-throw switch and a second power supply voltage, and a second supply inductor connected between a second output of the second multi-throw switch and the second power supply voltage.
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 between a first output and a second output of the filter;
- amplifying a first component of the differential filtered radio frequency signal received from the first output to generate a first amplified radio frequency signal;
- amplifying a second component of the differential filtered radio frequency signal received from the second output to generate a second amplified radio frequency signal;
- receiving the first amplified radio frequency signal as an input to a first multi-throw switch;
- receiving the second amplified radio frequency signal as an input to a second multi-throw switch;
- providing a first power supply voltage to a center tap of a primary section of a balun, the primary section connected between a first output of the first multi-throw switch and a first output of the second multi-throw switch;
- and
- providing a second power supply voltage to a first supply inductor and a second supply inductor, the first supply inductor connected between a second output of the first multi-throw switch and the second power supply voltage, and the second supply inductor connected between a second output of the second multi-throw switch and the second power supply voltage.
5 more elements
A front-end system comprising:
- a filter configured to filter a radio frequency receive signal to generate a differential filtered radio frequency signal between a first output and a second output;
- a first low noise amplifier configured to generate a first amplified radio frequency signal by amplifying a first component of the differential filtered radio frequency signal received from the first output;
- a second low noise amplifier configured to generate a second amplified radio frequency signal by amplifying a second component of the differential filtered radio frequency signal received from the second output;
- a first multi-throw switch having an input configured to receive the first amplified radio frequency signal;
- a second multi-throw switch having an input configured to receive the second amplified radio frequency signal;
- a balun including a primary section connected between a first output of the first multi-throw switch and a first output of the second multi-throw switch and having a center tap connected to a first power supply voltage;
- and
- a first supply inductor connected between a second output of the first multi-throw switch and a second power supply voltage, and a second supply inductor connected between a second output of the second multi-throw switch and the second power supply voltage.
5 more elements
Dependencies are inferred from the claim text.