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US 11,909,360 B2Granted
Radio frequency circuit, communication device, and antenna module
AssigneeMurata Manufacturing Co., Ltd.
InventorsTomohiro Sano, Hirotsugu Mori
Life of this patent
Estimating the term…
Abstract
A radio frequency circuit includes a power amplifier configured to selectively amplify one of a first radio frequency signal and a second radio frequency signal that have different bandwidths, and when the first radio frequency signal is input to the power amplifier, a first bias signal is applied to the power amplifier, and when the second radio frequency signal is input to the power amplifier, a second bias signal different from the first bias signal is applied to the power amplifier.
Claims20
A radio frequency circuit, comprising:
- an amplifier configured to amplify radio frequency signals having different bandwidths;
- a first switch configured to switch between application of a first bias signal to the amplifier and application of a second bias signal to the amplifier,
- wherein bias voltages of the first and second bias signals applied to the amplifier track a change in a power amplitude of the radio frequency signal amplified by the amplifier,
- wherein a degree of tracking the change in the power amplitude corresponds to a bandwidth of the radio frequency signal amplified by the amplifier, and
- wherein the first bias signal changes to track the change in power amplitude at a different degree than the second bias signal.
2 more elements
A radio frequency circuit, comprising:
- an amplifier configured to amplify radio frequency signals having different bandwidths,
- wherein a bias voltage of a bias signal applied to the amplifier tracks a change in a power amplitude of the radio frequency signal amplified by the amplifier,
- wherein a degree of tracking the change in the power amplitude corresponds to a bandwidth of the radio frequency signal amplified by the amplifier,
- wherein a modulation scheme of the amplifier corresponds to the bandwidth of the radio frequency signal amplified by the amplifier,
- wherein the modulation scheme for a first radio frequency signal amplified by the amplifier is based on a fourth generation mobile communication system (4G),
- wherein the modulation scheme for a second radio frequency signal amplified by the amplifier is based on a wireless local area network (WLAN), and
- wherein a peak to average power ratio (PAPR) of the bias signal when the first radio frequency signal is amplified by the amplifier is lower than the PAPR of the bias signal when the second radio frequency signal is amplified by the amplifier.
4 more elements
A radio frequency circuit, comprising:
- an amplifier configured to amplify radio frequency signals having different bandwidths;
- a first bias power supply circuit configured to output a first bias signal to the amplifier;
- and
- a second bias power supply circuit configured to output a second bias signal to the amplifier,
- wherein bias voltages of the first and second bias signals applied to the amplifier tracks a change in a power amplitude of the radio frequency signal amplified by the amplifier,
- wherein a degree of tracking the change in the power amplitude corresponds to a bandwidth of the radio frequency signal amplified by the amplifier, and
- wherein the first bias signal changes to track the change in power amplitude at a different degree than the second bias signal.
4 more elements
Dependencies are inferred from the claim text.