Method and apparatus for adapting a variable impedance network
View Patent ↗The present disclosure may include, for example, a tunable capacitor having a decoder for generating a plurality of control signals, and an array of tunable switched capacitors comprising a plurality of fixed capacitors coupled to a plurality of switches. The plurality of switches can be controlled by the plurality of control signals to manage a tunable range of reactance of the array of tunable switched capacitors. Additionally, the array of tunable switched capacitors is adapted to have non-uniform quality (Q) factors. Additional embodiments are disclosed.
1. A device comprising:
a tunable array of switched reactive elements on a single die, the array comprising a plurality of reactive elements coupled to a plurality of switches, each of the plurality of reactive elements having a fixed reactance value, each of the plurality of switches having a resistance associated therewith,
wherein the single die has a plurality of ports comprising a first port connected to a first reactive element of the plurality of reactive elements having a first reactance value, a second port separate from the first port and connected to reactive elements of the plurality of reactive elements other than the first reactive element, and a third port connected to the plurality of switches, the array thereby being configurable in a first configuration including the first reactive element and providing a first tuning range and a second configuration excluding the first reactive element and providing a second tuning range.
2. The device of claim 1 , wherein the array of switched reactive elements is adapted to have non-uniform quality (Q) factors, the array of switched reactive elements thereby adapted to maintain a Q factor for the array over a predetermined operating frequency range of the device.
3. The device of claim 1 , wherein the reactance values of the plurality of reactive elements comprise a binary array.
4. The device of claim 1 , wherein the array comprises a plurality of inductors coupled to the plurality of switches.
5. The device of claim 1 , wherein the array comprises a plurality of capacitors coupled to the plurality of switches.
6. The device of claim 5 , wherein the first reactive element is a first capacitor of the plurality of capacitors having a largest capacitance value.
7. A device comprising:
a tunable array of switched reactive elements on a single die, the array comprising a plurality of reactive elements coupled to a plurality of switches, each of the plurality of reactive elements having a fixed reactance value, each of the plurality of switches having a resistance associated therewith,
wherein the single die has a plurality of ports comprising a first port connected to a first reactive element of the plurality of reactive elements having a first reactance value, a second port separate from the first port and connected to reactive elements of the plurality of reactive elements other than the first reactive element, and a third port connected to the plurality of switches, the array thereby being configurable in a first configuration including the first reactive element and a second configuration excluding the first reactive element, wherein the array is adapted to have non-uniform quality (Q) factors.
8. The device of claim 7 , wherein the first configuration provides a first tuning range and the second configuration provides a second tuning range.
9. The device of claim 7 , wherein the array of switched reactive elements is adapted to maintain a Q factor for the array over a predetermined operating frequency range of the device.
10. The device of claim 7 , wherein the reactance values of the plurality of reactive elements comprise a binary array.
11. The device of claim 7 , wherein the array comprises a plurality of inductors coupled to the plurality of switches.
12. The device of claim 7 , wherein the array comprises a plurality of capacitors coupled to the plurality of switches.
13. The device of claim 12 , wherein the first reactive element is a first capacitor of the plurality of capacitors having a largest capacitance value.
14. A device comprising:
a tunable array of switched reactive elements on a single die, the array comprising a plurality of reactive elements coupled to a plurality of switches, each of the plurality of reactive elements having a fixed reactance value, each of the plurality of switches having a resistance associated therewith,
wherein the single die has a plurality of ports comprising a first port connected to a first reactive element of the plurality of reactive elements having a first reactance value, a second port separate from the first port and connected to reactive elements of the plurality of reactive elements other than the first reactive element, and a third port connected to the plurality of switches, the array thereby being configurable in a first configuration including the first reactive element providing a first tuning range and a second configuration excluding the first reactive element and providing a second tuning range, wherein the array of switched reactive elements is adapted to maintain a Q factor for the array over a predetermined operating frequency range of the device.
15. The device of claim 14 , wherein the reactance values of the plurality of reactive elements comprise a binary array.
16. The device of claim 14 , wherein the array comprises a plurality of inductors coupled to the plurality of switches.
17. The device of claim 14 , wherein the array of switched reactive elements is adapted to have non-uniform quality (Q) factors, and wherein the predetermined operating frequency range includes the first tuning range and the second tuning range.
18. The device of claim 17 , wherein the device comprises a plurality of combinations formed by coupling each reactive element of the plurality of reactive elements respectively to a switch of the plurality of switches, wherein each of the plurality of combinations has a different Q factor.
19. The device of claim 14 , wherein the array comprises a plurality of capacitors coupled to the plurality of switches.
20. The device of claim 19 , wherein the first reactive element is a first capacitor of the plurality of capacitors having a largest capacitance value.