Programmable low noise amplifier and methods for use therewith
View Patent ↗A low noise amplifier includes a programmable input stage, having a first gain that is programmable based on a first control signal. A programmable cascode stage, has a second gain that is programmable based on a second control signal. A programmable resistor stage controls the quality of a resonant tank circuit, based on a third control signal.
1. A low noise amplifier that generates an amplified received signal from a received signal, the low noise amplifier comprising:
a programmable input stage, having a first gain that is programmable based on a first control signal;
a programmable cascode stage, coupled to the programmable input stage, having a second gain that is programmable based on a second control signal; and
a programmable resistor stage, coupled to the programmable cascode stage, that control a quality of a resonant tank circuit, based on a third control signal.
2. The low noise amplifier of claim 1 , wherein the resonant tank circuit includes at least one inductor.
3. The low noise amplifier of claim 1 , wherein the programmable cascode stage includes a plurality of transistors having individual gains that are programmable based on the second control signal.
4. The low noise amplifier of claim 3 , wherein the individual gains are programmable based on the second control signal to a plurality of discrete gain steps.
5. The low noise amplifier of claim 1 , wherein the programmable input stage includes a plurality of transistors that are selectively turned on based on the first control signal.
6. The low noise amplifier of claim 1 , wherein the programmable input stage includes a plurality of transistors that are selectively turned off based on the first control signal.
7. A method for use in a low noise amplifier, the method comprising:
programming a first gain of a programmable input stage, based on a first control signal;
programming a second gain of a programmable cascode stage, based on a second control signal; and
programming a programmable resistor stage to control a quality of a resonant tank circuit, based on a third control signal.
8. The method of claim 7 , wherein the resonant tank circuit includes at least one inductor.
9. The method of claim 7 , wherein the programmable cascode stage includes a plurality of transistors having individual gains that are programmable based on the second control signal.
10. The method of claim 9 , wherein the individual gains are programmable based on the second control signal to a plurality of discrete gain steps.
11. The method of claim 7 , wherein the programmable input stage includes a plurality of transistors that are selectively turned on based on the first control signal.
12. The method of claim 7 , wherein the programmable input stage includes a plurality of transistors that are selectively turned off based on the first control signal.