High-voltage power amplification system
A high-voltage power amplification system can include a supply circuit configured to provide a high supply voltage in an average power tracking mode. The power amplification system can further include a power amplifier configured to operate with the high supply voltage and provide an impedance that substantially matches an impedance of a component coupled to an output of the power amplifier. The power amplification system can further include a signal path configured to route an amplified signal from the output of the power amplifier to the component, with the output path being substantially free of an output matching network.
1. An amplification system comprising:
a supply circuit configured to provide a high supply voltage in an average power tracking mode; and
an amplifier configured to operate with the high supply voltage and provide an output impedance that substantially matches a load impedance of a component coupled to an output of the amplifier, such that the amplification system is substantially free of a matching network for transforming the output impedance of the amplifier to the load impedance of the component.
2. The amplification system of claim 1 further comprising the component.
3. The amplification system of claim 1 wherein the component includes a filter.
4. The amplification system of claim 3 wherein the output impedance of the amplifier has a value that is greater than approximately 40 Ohms.
5. The amplification system of claim 1 wherein the supply circuit includes a boost DC/DC converter configured to generate the high supply voltage based on an input voltage.
6. The amplification system of claim 5 wherein the input voltage includes a battery voltage.
7. The amplification system of claim 1 wherein the amplifier is configured as a power amplifier.
8. The amplification system of claim 7 wherein the power amplifier includes a heterojunction bipolar transistor implemented as a gallium arsenide device.
9. The amplification system of claim 1 further comprising one or more additional amplifiers, each configured to operate with the high supply voltage and provide an output impedance that substantially matches load impedance of a respective additional component coupled to an output of the additional amplifier, such that the amplification system is substantially free of a matching network for transforming the output impedance of each additional amplifier to the load impedance of the respective additional component.
10. The amplification system of claim 9 wherein the amplification system is substantially free of a band selection switch between the amplifiers and the components.
11. The amplification system of claim 1 wherein the amplifier is configured to amplify a radio-frequency signal.
12. A method for processing a signal, the method comprising:
providing a high supply voltage in an average power tracking mode to an amplifier;
operating the amplifier with the high supply voltage to amplify a signal and to provide an output impedance that substantially matches a load impedance of a downstream component; and
routing the amplified signal to the downstream component without transforming the output impedance of the amplifier to the load impedance of the downstream component.
13. The method of claim 12 wherein the downstream component is a filter.
14. The method of claim 13 further comprising filtering the amplified signal.
15. The method of claim 12 wherein the output impedance of the amplifier has a value that is greater than approximately 40 Ohms.
16. The method of claim 12 wherein the providing of the high supply voltage includes a performing a boost DC/DC conversion to generate the high supply voltage based on an input voltage.
17. The method of claim 12 wherein the signal being amplified includes a radio-frequency signal for transmission.
18. A packaged module comprising:
a packaging substrate; and
an amplification system implemented on the packaging substrate and including a supply circuit configured to provide a high supply voltage in an average power tracking mode, the amplification system further including an amplifier configured to operate with the high supply voltage and provide an output impedance that substantially matches a load impedance of a component coupled to an output of the amplifier, such that the amplification system is substantially free of a matching network for transforming the output impedance of the amplifier to the load impedance of the component.
19. The packaged module of claim 18 wherein the component includes a filter.
20. The packaged module of claim 18 wherein the packaged module is a front-end module or a power amplifier module.