US 2019/0158047 A1Published application

Switched amplifier

AssigneeKabushiki Kaisha Toshiba

InventorGavin WATKINS

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Abstract

An amplifier for amplifying radio frequency signals comprising: a signal splitter configured to split an input radio frequency signal into two or more signals; and two or more switching power amplifiers. Each of the switching power amplifiers is configured to amplify a respective signal of the two or more signals using an active device and output a respective amplified signal at a respective output terminal of the switching power amplifier when the switching power amplifier is activated. Each of the two or more switching power amplifiers has a different maximum output power. The amplifier further comprises: an output node connected to each of the output terminals of the switching power amplifiers to combine the amplified signals and output a combined amplified signal; and control circuitry configured to issue control signal to control bias voltages provided to a gate of each of the active devices of the switching power amplifier to selectively activate and deactivate the active devices.

Claims14

Dependent claims

An amplifier for amplifying radio frequency signals, the amplifier comprising:

an input node for receiving an input radio frequency signal to be amplified;
a signal splitter connected to the input node and configured to split the input radio frequency signal into two or more signals;
two or more switching power amplifiers corresponding to the two or more signals, wherein each of the switching power amplifiers is configured to amplify a respective signal of the two or more signals using an active device and output a respective amplified signal at a respective output terminal of the switching power amplifier when the switching power amplifier is activated, wherein each of the two or more switching power amplifiers has a different maximum output power;
an output node connected to each of the output terminals of the switching power amplifiers to combine the amplified signals and output a combined amplified signal, and
control circuitry configured to issue two or more control signals to the two or more switching power amplifiers, each control signal controlling a bias voltage provided to a gate of the active device of the respective switching power amplifier to selectively activate and deactivate the active device.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/816,278Filed 17 Nov 2017
Published: 23 May 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification20 codes

H03F 3/72
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements: gated amplifiers, i.e. amplifiers which are rendered…
H03F 1/0288
In transistor amplifiers: using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using…
H03F 1/56
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H03F 3/193
With semiconductor devices only: with field-effect devices

Family

US 10,547,279 B2Related patent
US 2019/0158047 A1This patent

From the US filing history. Foreign family members aren’t listed.

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