Power amplification system with common base pre-amplifier

Patent metadata

Field	Value
Publication number	US-10110183-B2
Application number	US-201615042355-A
Country	US
Kind code	B2
Filing date	Feb 12, 2016
Priority date	Feb 15, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

Power amplification system with common base pre-amplifier. A power amplification system can include a common base amplifier configured to amplify an input radio-frequency (RF) signal received at an input node to generate an intermediate RF signal at an intermediate node. The power amplification system can further include a power amplifier configured to amplify the intermediate RF signal received at the intermediate node to generate an output RF signal at an output node.

First claim

What is claimed is:

1. A power amplification system comprising:
a common base amplifier including a transistor having an emitter, a collector, and a base, and configured to amplify an input signal received at an input node coupled to the emitter to generate an intermediate signal at an intermediate node coupled to the collector, the base coupled to a ground potential;
an LC tank circuit including an inductor coupled between the emitter and the ground potential and a capacitor coupled between the emitter and the ground potential; and
a power amplifier configured to amplify the intermediate signal received at the intermediate node to generate an output signal at an output node.

2. The power amplification system of claim 1 wherein the collector is coupled to the intermediate node via an impedance.

3. The power amplification system of claim 2 wherein the impedance includes a capacitor coupled between the collector and the intermediate node and an inductor coupled between the collector and a supply voltage.

4. A power amplification system comprising:
a common base amplifier including a transistor having an emitter, a collector, and a base, and configured to amplify an input signal received at an input node coupled to the emitter to generate an intermediate signal at an intermediate node coupled to the collector, the base coupled to a ground potential via an impedance that includes a capacitor, the base further coupled to a battery voltage via a resistor; and
a power amplifier configured to amplify the intermediate signal received at the intermediate node to generate an output signal at an output node.

5. The power amplification system of claim 1 wherein the common base amplifier is configured to amplify the input signal by approximately 3 to 5 dB.

6. The power amplification system of claim 1 wherein the common base amplifier presents an input impedance of approximately 50 ohms.

7. The power amplification system of claim 1 wherein the power amplifier is a single-ended power amplifier.

8. The power amplification system of claim 7 wherein the single-ended power amplifier includes a cascode power amplifier.

9. The power amplification system of claim 1 wherein the power amplifier is one of a carrier amplifier or a peaking amplifier of a Doherty power amplifier.

10. A power amplification system comprising:
a common base amplifier including a transistor having an emitter, a collector, and a base, and configured to amplify an input signal received at an input node coupled to the emitter to generate an intermediate signal at an intermediate node coupled to the collector, the base coupled to a battery voltage via a resistor, the collector coupled to the battery node via an inductor; and
a power amplifier configured to amplify the intermediate signal received at the intermediate node to generate an output signal at an output node.

11. The power amplification system of claim 10 wherein the base is further coupled to a ground potential via a first capacitor and the collector is further coupled to the intermediate node via a second capacitor.

12. The power amplification system of claim 1 wherein the power amplifier is a high-voltage power amplifier.

13. The power amplification system of claim 12 wherein the high-voltage power amplifier is a high-voltage bipolar transistor power amplifier.

14. A radio-frequency module comprising:
a packaging substrate configured to receive a plurality of components; and
a power amplification system implemented on the packaging substrate, and including a common base amplifier configured to amplify an input signal received at an input node to generate an intermediate signal at an intermediate node, the common base amplifier including a transistor having an emitter coupled to the input node, a collector coupled to the intermediate node, and a base coupled to a ground potential, the power amplification system further including an LC tank circuit having an inductor coupled between the emitter and the ground potential and a capacitor coupled between the emitter and the ground potential, the power amplification system further including a power amplifier configured to amplify the intermediate signal received at the intermediate node to generate an output signal at an output node.

15. The radio-frequency module of claim 14 wherein the radio-frequency module is a front-end module.

16. A wireless device comprising:
a transceiver configured to generate an input signal;
a front-end module in communication with the transceiver, and including a power amplification system that includes a common base amplifier configured to amplify at least a portion of the input signal received at an input node to generate an intermediate signal at an intermediate node, the common base amplifier including a transistor having an emitter coupled to the input node, a collector coupled to the intermediate node, and a base coupled to a ground potential, the power amplification system further including an LC tank circuit having an inductor coupled between the emitter and the ground potential and a capacitor coupled between the emitter and the ground potential, the power amplification system further including a power amplifier configured to amplify the intermediate signal received at the intermediate node to generate an output signal at an output node; and
an antenna in communication with the front-end module, and configured to transmit the output signal.

17. The wireless device of claim 16 wherein the portion of the input signal is at least one of a carrier portion or a peaking portion.

Assignees

• Skyworks Solutions Inc

Inventors

• Lyalin Aleksey A
• Hwang Taesong
• Reisner Russ Alan

Classifications

• H03F1/0288

  using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers · CPC title

• H03F2200/451

  the amplifier being a radio frequency amplifier · CPC title

• H03F3/72

  Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal · CPC title

• H03F1/22

  by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively · CPC title

• H03F3/245 Primary

  with semiconductor devices only · CPC title