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US 11,239,799 B2Granted
Apparatus for radio-frequency amplifier with improved performance and associated methods
AssigneeSilicon Laboratories Inc.
InventorsLuigi Panseri, Mustafa H. Koroglu, Praveen Vangala, John M. Khoury
Life of this patent
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Abstract
An apparatus includes a radio-frequency (RF) circuit, which includes a power amplifier coupled to receive an RF input signal and to provide an RF output signal in response to a modified bias signal. The RF circuit further includes a bias path circuit coupled to modify a bias signal as a function of a characteristic of an input signal to generate the modified bias signal. The bias path circuit provides the modified bias signal to the power amplifier.
Claims20
An apparatus, comprising:
- a radio-frequency (RF) circuit, comprising:
- a power amplifier coupled to receive an RF input signal, the RF input signal derived from an output signal of an intermediate frequency (IF) delay adjust circuit, and to provide an RF output signal in response to a modified bias signal;
- and
- a bias path circuit coupled to modify a bias signal as a function of a characteristic of an input signal to generate the modified bias signal, and to provide the modified bias signal to the power amplifier.
1 more element
An apparatus, comprising:
- a radio-frequency (RF) circuit, comprising:
- a power amplifier coupled to receive an RF input signal, the RF input signal derived from an output signal of an intermediate frequency (IF) delay adjust circuit, and to provide an RF output signal;
- an intermediate-frequency (IF)/RF path circuit to receive an input signal and provide the RF input signal to the power amplifier;
- and
- a bias path circuit coupled to generate a bias signal as a function of a characteristic of the input signal, and to provide the bias signal to the power amplifier.
2 more elements
A method of operating a power amplifier, the method comprising:
- receiving an input signal;
- modifying a bias signal of the power amplifier as a function of a characteristic of the input signal to generate a modified bias signal;
- biasing the power amplifier using the modified bias signal;
- and
- amplifying, using the amplifier, an RF signal derived from the input signal, the RF signal derived from an output signal of an intermediate frequency (IF) delay adjust circuit.
2 more elements
Dependencies are inferred from the claim text.