Hybrid power module

Patent metadata

Field	Value
Publication number	US-9473089-B2
Application number	US-201414272615-A
Country	US
Kind code	B2
Filing date	May 8, 2014
Priority date	May 8, 2014
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A hybrid power module for supplying a power to a power amplifier is provided. The hybrid power module includes a DC-DC converter and a linear regulator. The DC-DC converter provides a first current to the power amplifier via a first inductor according to an operating frequency and an envelope tracking signal. The linear regulator provides a second current to the power amplifier via a first capacitor according to the envelope tracking signal. A switch-mode power supply (SMPS) ripple voltage caused by the DC-DC converter is reduced by the linear regulator.

First claim

What is claimed is:

1. A hybrid power module for supplying a power to a power amplifier, comprising:
a DC-DC converter, providing a first current to the power amplifier via a first inductor according to an operating frequency and an envelope tracking signal;
a linear regulator, providing a second current to the power amplifier via a first capacitor according to the envelope tracking signal;
a subtractor, comprising a first input terminal for receiving the envelope tracking signal and a second input terminal for receiving a feedback signal corresponding to the power; and
a current generating unit coupled to the first inductor and the first capacitor, providing a third current to the power amplifier,
wherein a switch-mode power supply (SMPS) ripple voltage caused by the DC-DC converter is reduced by the linear regulator,
wherein the subtractor subtracts the feedback signal from the envelope tracking signal, to provide a first signal to the DC-DC converter, and the DC-DC converter provides the first current according to the operating frequency and the first signal.

2. The hybrid power module as claimed in claim 1 , further comprising:
a compensation unit coupled between the subtractor and the power amplifier, adding an offset voltage into the feedback signal.

3. A hybrid power module for supplying a power to a power amplifier, comprising:
a DC-DC converter, providing a first current to the power amplifier via a first inductor according to an operating frequency and an envelope tracking signal;
a linear regulator, providing a second current to the power amplifier via a first capacitor according to the envelope tracking signal;
a subtractor, comprising a first input terminal for receiving the envelope tracking signal and a second input terminal for receiving a feedback signal corresponding to the power; and
a second capacitor coupled between a ground and the first capacitor
wherein a switch-mode power supply (SMPS) ripple voltage caused by the DC-DC converter is reduced by the linear regulator,
wherein the subtractor subtracts the feedback signal from the envelope tracking signal, to provide a first signal to the DC-DC converter, and the DC-DC converter provides the first current according to the operating frequency and the first signal.

4. The hybrid power module as claimed in claim 3 , further comprising:
a second inductor coupled between the second capacitor and the linear regulator.

5. The hybrid power module as claimed in claim 4 , wherein the first inductor is larger than the second inductor, and the first capacitor is larger than the second capacitor.

6. A hybrid power module for supplying a power to a power amplifier, comprising:
a DC-DC converter, providing a first current to the power amplifier via a first inductor according to an operating frequency and an envelope tracking signal;
a linear regulator, providing a second current to the power amplifier via a first capacitor according to the envelope tracking signal;
a subtractor, comprising a first input terminal for receiving the envelope tracking signal and a second input terminal for receiving a feedback signal corresponding to the power; and
a coupling capacitor coupled between the first and second input terminals of the subtractor,
wherein a switch-mode power supply (SMPS) ripple voltage caused by the DC-DC converter is reduced by the linear regulator,
wherein the subtractor subtracts the feedback signal from the envelope tracking signal, to provide a first signal to the DC-DC converter, and the DC-DC converter provides the first current according to the operating frequency and the first signal.

7. A hybrid power module for providing a power to a power amplifier, comprising:
a DC-DC converter, providing a first current to the power amplifier via a first inductor according to an operating frequency and a first signal;
a linear regulator, providing a second current to the power amplifier via a first capacitor and providing the first signal to the DC-DC converter according to an envelope tracking signal;
a subtractor, comprising a first input terminal for receiving the first signal from the liner regulator and a second input terminal for receiving a feedback signal corresponding to the power; and
a current generating unit coupled to the first inductor and the first capacitor, providing a third current to the power amplifier,
wherein a switch-mode power supply (SMPS) ripple voltage caused by the DC-DC converter is reduced by the linear regulator,
wherein the subtractor subtracts the feedback signal from the first signal to provide a second signal, and the DC-DC converter provides the first current according to the operating frequency and the second signal.

8. The hybrid power module as claimed in claim 6 , further comprising:
a compensation unit coupled between the subtractor and the power amplifier, adding an offset voltage into the feedback signal.

Assignees

• Mediatek Inc

Inventors

• Hong Hao-Ping
• Wang Hung-I
• Tseng Chun-Yen
• Hsu Yen-Hsun

Classifications

• H03F2200/459

  Ripple reduction circuitry being used in an amplifying circuit · CPC title

• H03F2200/432

  Two or more amplifiers of different type are coupled in parallel at the input or output, e.g. a class D and a linear amplifier, a class B and a class A amplifier · CPC title

• H03F2200/102

  A non-specified detector of a signal envelope being used in an amplifying circuit · CPC title

• H03F3/21

  with semiconductor devices only {(H03F3/245 takes precedence)} · CPC title

• H03F3/245 Primary

  with semiconductor devices only · CPC title