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US 9,002,306 B2Granted
Providing multiple inductors for a radio tuner
AssigneeSilicon Laboratories Inc.
InventorsJing Li, Dan B. Kasha, Aslamali Rafi
Life of this patent
Estimating the term…
Abstract
A method includes receiving a desired channel indication in a radio tuner, determining a band of operation in which the channel is located, and if the channel is within a first band coupling multiple inductors into a resonant tank, and if the desired channel is within a second band coupling a single inductor into the resonant tank.
Claims20
An apparatus comprising:
- a receiver formed on a single semiconductor die adapted in an integrated circuit (IC), the receiver having a single radio frequency (RF) front end including a low noise amplifier (LNA) coupled to a first pin of the IC to receive and process RF signals of a first frequency band and a second frequency band via a single signal path, the single RF front end including a varactor to provide a selected capacitance level to resonate with an inductance coupled to the IC, the receiver further including a controller to cause a capacitor to be coupled with the inductance if the RF signal is of the first frequency band.
A method comprising:
- receiving a desired channel indication in a radio tuner;
- determining a band of operation in which the desired channel is located, and if the desired channel is within a first frequency band coupling a capacitor into a resonant tank including a first inductor coupled to a first pin of the radio tuner and a varactor internal to the radio tuner, the capacitor switchably coupled to a second pin of the radio tuner;
- and
- if the desired channel is within a second frequency band, not coupling the capacitor to the resonant tank.
1 more element
A system comprising:
- an antenna to receive a radio frequency (RF) signal, the antenna coupled to a first pin of an integrated circuit (IC) including a radio tuner;
- a first inductor fixably coupled to the first pin of the IC, wherein the first inductor and a varactor of the IC form a resonant tank;
- a capacitor switchably coupled to the resonant tank via a second pin of the IC;
- and
- a controller to control coupling of the capacitor to the resonant tank when a frequency of a desired channel is in a first band, the controller further to de-couple the capacitor from the resonant tank when the frequency of the desired channel is in a second band.
2 more elements
Dependencies are inferred from the claim text.