System and method for providing a configurable inductor less multi-stage low-noise amplifier
In accordance with a particular embodiment of the present invention, an apparatus is offered that includes a configurable feedback low noise amplifier (LNA) connected to a common source connected input transistor to realize a specific value of an input impedance, the input impedance being controlled by transconductance, the overall gain being defined by a global current feedback network. In more specific embodiments, the LNA is used to provide a wide frequency band and a defined input impedance. In other embodiments, the LNA achieves a low noise parameter and low output distortion. Also, the LNA can use a ladder network of grounded switches and floating resistors in order to avoid floating switches in a feedback path. The LNA can increase parametric yield. The LNA can be used to control noise, gain, distortion, and input impedance independently.
1. A method, comprising:
implementing a configurable feedback low noise amplifier (LNA) connected to a common source connected input transistor to realize a specific value of an input impedance, the input impedance being controlled by transconductance, the overall gain being defined by a global current feedback network, whereby the LNA does not include an inductor;
wherein the LNA uses a ladder network of grounded switches and floating resistors in order to avoid floating switches in a feedback path.
2. The method of claim 1 , wherein the LNA is used to provide a designated frequency band and a defined input impedance.
3. The method of claim 1 , wherein the LNA achieves a low noise parameter and low output distortion.
4. The method of claim 1 , wherein the LNA increases parametric yield.
5. The method of claim 1 , wherein the LNA is used to control noise, gain, distortion, or input impedance independently.
6. The method of claim 1 , wherein the LNA is used in software-defined radio systems.
7. The method of claim 1 , wherein the LNA is used in a system where noise, linearity, gain, or input matching is targeted.
8. An apparatus, comprising:
a configurable feedback low noise amplifier (LNA) connected to a common source connected input transistor to realize a specific value of an input impedance, the input impedance being controlled by transconductance, the overall gain being defined by a global current feedback network, whereby the LNA does not include an inductor;
wherein the LNA uses a ladder network of grounded switches and floating resistors in order to avoid floating switches in a feedback path.
9. The apparatus of claim 8 , wherein the LNA is used to provide a designated frequency band and a defined input impedance.
10. The apparatus of claim 8 , wherein the LNA achieves a low noise parameter and low output distortion.
11. The apparatus of claim 8 , wherein the LNA increases parametric yield.
12. The apparatus of claim 8 , wherein the LNA is used to control noise, gain, distortion, or input impedance independently.
13. The apparatus of claim 8 , wherein the LNA is used in software-defined radio systems.
14. The apparatus of claim 8 , wherein the LNA is used in a system where noise, linearity, gain, or input matching is targeted.
15. Logic embedded in a computer medium and operable to:
implement a configurable feedback low noise amplifier (LNA) connected to a common source connected input transistor to realize a specific value of an input impedance, the input impedance being controlled by transconductance, the overall gain being defined by a global current feedback network, wherein the LNA uses a ladder network of grounded switches and floating resistors in order to avoid floating switches in a feedback path.
16. The logic of claim 15 , wherein the LNA is used to provide a wide frequency band and a defined input impedance.
17. The logic of claim 15 , wherein the LNA achieves a low noise parameter and low output distortion.
18. The logic of claim 15 , wherein the LNA increases parametric yield.
19. The logic of claim 15 , wherein the LNA is used to control noise, gain, distortion, or input impedance independently.
20. The logic of claim 15 , wherein the LNA is used in software-defined radio systems.
21. The logic of claim 15 , wherein the LNA is used in a system where noise, linearity, gain, or input matching is targeted.