Non-match power amplifier and method for increased output 1 dB compression point
View Patent ↗The invention enables an increase in linear power output ranges in a power amplifier by using an unmatched power amplifier driver in place of a matched power amplifier driver.
1. A power amplifier, comprising:
a differential pair;
a pair of differential inductors coupled to the differential pair and to a power supply;
wherein the pair of differential inductors is not matched relative to an external load; and
wherein the power amplifier tunes out parasitic capacitance.
2. The power amplifier of claim 1 , wherein output of the differential pair is combined.
3. The power amplifier of claim 1 , wherein the differential pair includes a positive and a negative branch.
4. The power amplifier of claim 3 , wherein an electrical equivalent of each branch of the driver includes a capacitor interspersed between two unmatched resistors.
5. The power amplifier of claim 4 , wherein the two unmatched resistors include a 50 Ohm resistor and a 200 Ohm resistor.
6. A transmitter having a power amplifier according to claim 1 .
7. A method, comprising:
presenting a load to a differential pair of a power amplifier;
wherein the differential pair is coupled to a pair of differential inductors, which is coupled to a power supply.
wherein the pair of differential inductors is not matched relative to an external load; and
wherein the power amplifier tunes out parasitic capacitance.
8. The method of claim 7 , further comprising combining the output of the differential pair.
9. The method of claim 7 , wherein the differential pair includes a positive and a negative branch.
10. The method of claim 9 , wherein an electrical equivalent of each branch of the amplifier includes a capacitor interspersed between two unmatched resistors.
11. The methods of claim 10 , wherein the two unmatched resistors include a 50 Ohm resistor and a 200 Ohm resistor.
12. A system, comprising:
means for presenting a load to a differential pair of a power amplifier;
wherein the differential pair is coupled to a pair of differential inductors, which is coupled to a power supply
wherein the pair of differential inductors is not matched relative to an external load; and
wherein the system tunes out parasitic capacitance.