Tunable radio frequency (RF) front-end architecture using filter having adjustable inductance and capacitance

1. A device, comprising:

an adjustable capacitance;

a switchable inductance coupled to the adjustable capacitance and configured as a tunable resonant filter circuit, the switchable inductance comprising a tapped structure having a first inductance and a second inductance;

a low noise amplifier coupled to an output of the tunable resonant filter circuit, the low noise amplifier configured to generate a first amplified frequency selective signal; and

a second tunable filter coupled to an output of the low noise amplifier, the second tunable filter configured to provide a second frequency selective signal.

2. The device of claim 1 , further comprising a plurality of tunable resonant filter circuits.

3. The device of claim 1 , wherein the tunable resonant filter circuit comprises a notch characteristic configured to reject a blocker signal at a transmit frequency.

4. The device of claim 1 , wherein the tunable resonant filter circuit comprises one or more of a tunable notch resonator, a tunable bandpass resonator and a tunable trap resonator.

5. The device of claim 1 , wherein the first inductance and the second inductance comprise different inductance values.

6. The device of claim 1 , wherein at least one of the tunable resonant filter circuit and the second tunable filter comprises a notch characteristic.

7. The device of claim 1 , wherein the tunable resonant filter circuit provides a first signal rejection and the second tunable filter provides a second signal rejection.

8. The device of claim 7 , wherein, the first signal rejection is higher than the second signal rejection.

9. The device of claim 1 , wherein the tunable resonant filter circuit introduces a first insertion loss and the second tunable filter introduces a second insertion loss.

10. The device of claim 9 , wherein the first insertion loss is different than the second insertion loss.

11. A method, comprising:

generating a resonant frequency using an adjustable capacitance and a switchable inductance configured as a tunable filter, the switchable inductance comprising a tapped structure having a first inductance and a second inductance;

amplifying an output of the tunable filter to generate a first amplified frequency selective signal; and

filtering the first amplified frequency selective signal to provide a second frequency selective signal.

12. The method of claim 11 , further comprising generating a resonant frequency having a notch characteristic configured to reject a blocker signal at a transmit frequency.

13. The method of claim 11 , further comprising generating a resonant frequency having a bandpass characteristic.

14. The method of claim 11 , further comprising generating a resonant frequency having a trap characteristic.

15. A device, comprising:

means for filtering, the means for filtering comprising means for generating a resonant frequency using an adjustable capacitance and a switchable inductance, the switchable inductance comprising a tapped structure having a first inductance and a second inductance;

means for generating a first amplified frequency selective signal, the means for generating being coupled to an output of the means for filtering; and

means for providing a second frequency selective signal, the means for providing being coupled to an output of the means for generating.

16. The device of claim 15 , further comprising means for generating a resonant frequency having a notch characteristic configured to reject a blocker signal at a transmit frequency.

17. The device of claim 15 , further comprising means for generating a resonant frequency having a bandpass characteristic.

18. The device of claim 15 , further comprising means for generating a resonant frequency having a trap characteristic.