Method, system, and apparatus for resonator circuits and modulating resonators

Patent metadata

Field	Value
Publication number	US-9300038-B2
Application number	US-201414214119-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Dec 10, 2010
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

Embodiments of resonator circuits and modulating resonators and are described generally herein. One or more acoustic wave resonators may be coupled in series or parallel to generate tunable filters. One or more acoustic wave resonances may be modulated by one or more capacitors or tunable capacitors. One or more acoustic wave modules may also be switchable in a filter. Other embodiments may be described and claimed.

First claim

What is claimed is:

1. An improvement to an unmatched impedance in a system between an input load and an output load, the improvement including:
an acoustic wave module (AWD) coupled between the input load and output load, the AWD operating characteristics reducing the impedance mismatch between the input load and the output load; and
a pre-impedance matching module (IMM) coupled between the input load and the AWD, the pre-IMM including an active element.

2. The improvement to an unmatched impedance system of claim 1 , wherein the AWD has a resonant frequency and an anti-resonant frequency and the combination of the AWD and the pre-IMM modifies the AWD anti-resonant frequency.

3. The improvement to an unmatched impedance system of claim 2 , the combination of the AWD and the pre-IMM lowering the input load impedance about the modified AWD resonant frequency.

4. The improvement to an unmatched impedance system of claim 3 , wherein the AWD nominal resonant frequency and anti-resonant frequency are selected based on the modification of the AWD nominal resonant frequency and anti-resonant frequency by the pre-IMM.

5. The improvement to an unmatched impedance system of claim 3 , wherein the pre-IMM includes a capacitor.

6. An improvement to an unmatched impedance in a system between an input load and an output load, the improvement including;
an acoustic wave module (AWD) coupled between the input load and output load, the AWD operating characteristics reducing the impedance mismatch between the input load and the output load; and
a post-impedance matching module (IMM) coupled between the AWD and the output load, the post-IMM including an active element.

7. The improvement to an unmatched impedance system of claim 6 , wherein the AWD has a resonant frequency and an anti-resonant frequency and the combination of the AWD and the post-IMM modifies the AWD anti-resonant frequency.

8. The improvement to an unmatched impedance system of claim 7 , combination of the AWD and the post-IMM lowering the output load impedance about the modified AWD resonant frequency.

9. The improvement to an unmatched impedance system of claim 8 , wherein the AWD nominal resonant frequency and anti-resonant frequency are selected based on the modification of the AWD nominal resonant frequency and an anti-resonant frequency by the post-IMM.

10. The improvement to an unmatched impedance system of claim 8 , wherein the post-IMM includes a capacitor.

11. An impedance modification system for increasing or decreasing an impedance difference between an input load and an output load, the system coupled between the input load and output load, the system including:
an acoustic wave device (AWD); and
one of a pre-module coupled between the input load and the AWD and a post-module coupled between the AWD and the output load, the one of a pre-IMM and the post-IMM including an active element,
wherein the AWD operating characteristics and the one of the pre-module and the post-module characteristics are selected to increase or decrease an impedance difference between the input load and the output load.

12. The impedance modification system of claim 11 , further desirably filtering the signal produced by the input load.

13. The impedance modification system of claim 11 , the input load producing a radio frequency (RF) signal.

14. The impedance modification system of claim 11 , wherein the system is serially coupled between the input load and the output load.

15. The impedance modification system of claim 11 , the AWD operating characteristics and the one of the pre-module and the post-module characteristics selected to increase or decrease the impedance difference between the input load and the output load about a limited range of frequencies.

16. The impedance modification system of claim 11 , the AWD having a resonant frequency and an anti-resonant frequency and the system increasing or decreasing the impedance difference between the input load and the output load about the AWD resonant frequency.

17. The impedance modification system of claim 16 , wherein the system the real and imaginary impedance difference between the input load and the output load.

18. The impedance modification system of claim 17 , wherein the AWD has a resonant frequency and an anti-resonant frequency and the combination of the AWD and one of a pre-module and the post-module modifies the AWD anti-resonant frequency.

19. The impedance modification system of claim 18 , wherein the AWD nominal resonant frequency and anti-resonant frequency is selected based on the modification of the AWD nominal resonant frequency and anti-resonant frequency by one of a pre-module and the post-module.

20. The impedance modification system of claim 19 , the system decreasing the impedance difference between the input load and the output load about the modified AWD resonant frequency.

21. The impedance modification system of claim 11 , wherein the one of a pre-module and the post-module includes a capacitor.

22. The impedance modification system of claim 11 , the system including a pre-module to be coupled between the input load and the AWD, the pre-module including an active element.

23. The impedance modification system of claim 22 , wherein the AWD has a resonant frequency and an anti-resonant frequency and the combination of the AWD and the pre-module modifies the AWD anti-resonant frequency.

24. The impedance modification system of claim 23 , the system increasing or decreasing the input load impedance about the modified AWD resonant frequency to decrease the impedance difference between the input load and the output load.

25. The impedance modification system of claim 24 , wherein the AWD nominal resonant frequency and anti-resonant frequency is selected based on the modification of the AWD nominal resonant frequency and anti-resonant frequency by the pre-module.

26. The impedance modification system of claim 24 , wherein the pre-module includes a capacitor.

27. The impedance modification system of claim 11 , the system further including a post-module to be coupled between the AWM and the output load, the post-module including an active element.

28. The impedance modification system of claim 27 , wherein the AWD has a resonant frequency and an anti-resonant frequency and the combination of the AWD and the post-module modifies the AWD anti-resonant frequency.

29. The impedance matched system of claim 28 , the IMM lowering the output load impedance about the modified AWD resonant frequency.

30. The impedance modification system of claim 29 , wherein the AWD nominal resonant frequency and anti-resonant frequency are selected based on the modification of the AWD nominal resonant frequency and anti-resonant frequency by the post-module.

31. The impedance modification system of claim 29 , wherein the post-module includes a capacitor the system increasing or decreasing the output load impedance about the modified AWD resonant frequency to decrease the impedance difference between the input load and the output load.

Assignees

• Peregrine Semiconductor Corp

Inventors

• Burgener Mark L
• Cable James S

Classifications

• H03H2210/015

  Quality factor or bandwidth · CPC title

• H03H9/0009 Primary

  using surface acoustic wave devices · CPC title

• H03H9/6483

  Ladder SAW filters · CPC title

• H03H9/542

  including passive elements (H03H9/545 takes precedence) · CPC title

• H03H2250/00

  Indexing scheme relating to dual- or multi-band filters · CPC title