US 2026/0155795 A1Published application

Bias compensation circuits

AssigneeRichWave Technology Corp.

InventorYi-Fong Wang

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Abstract

A bias compensation circuit includes a power detection circuit and a bias circuit. The power detection circuit includes first and second power distribution circuits, first and second detection circuits, first and second conversion circuits, and a summing circuit. The first and second power distribution circuits respectively generate first and second input signals according to an input signal. The first and second detection circuits generate first and second power signals according to first and second input signals, respectively. The first and second conversion circuits generate first and second power currents according to first and second power signals, respectively. The summing circuit receives the first and second power signals to generate a power signal. The bias circuit receives the power signal to adjust a bias signal and provide the bias signal to the amplifier circuit. An amount of variation of the bias signal per power unit is adjustable.

Claims20

Dependent claims

A bias compensation circuit providing a bias signal to an amplifier circuit, the bias compensation circuit comprising:

a power detection circuit configured to detect a power of the amplifier circuit, the power detection circuit comprising:
an input terminal configured to receive an input signal of the amplifier circuit;
an output terminal configured to output a power signal;
a first power allocation circuit coupled to the input terminal, configured to generate a first power allocation signal according to the input signal;
a first detection circuit coupled to the first power allocation circuit, configured to generate a first detection signal according to the first power allocation signal;
a second power allocation circuit coupled to the input terminal or the first power allocation circuit, configured to generate a second power allocation signal according to the input signal, the second power allocation signal corresponding to a power zone exceeding a power zone of the first power allocation signal;
a second detection circuit coupled to the second power allocation circuit, configured to generate a second detection signal according to the second power allocation signal;
and
an output circuit coupled to the first detection circuit and the second detection circuit, the output circuit comprising:
a first conversion circuit configured to convert the first detection signal into a first power current;
a second conversion circuit configured to convert the second detection signal into a second power current;
and
a combining circuit coupled to the first conversion circuit and the second conversion circuit, configured to receive the first power current and the second power current and generate a power signal;
and
a bias circuit coupled to the output terminal of the power detection circuit, configured to receive the power signal to adjust the bias signal, wherein an amount of variation of the bias signal per power unit is adjustable.

12 more elements

A bias compensation circuit providing a bias signal to an amplifier circuit, the bias compensation circuit comprising:

a power detection circuit configured to detect a power of the amplifier circuit, the power detection circuit comprising:
an input terminal configured to receive an input signal of the amplifier circuit;
an output terminal configured to output a power signal;
a first power allocation circuit coupled to the input terminal, configured to generate a first power allocation signal according to the input signal;
a first detection circuit coupled to the first power allocation circuit, configured to generate a first detection signal according to the first power allocation signal;
a second power allocation circuit coupled to the input terminal, configured to receive the first detection signal, and generate a second power allocation signal according to the input signal, the second power allocation signal corresponding to a power zone exceeding a power zone of the first power allocation signal;
a second detection circuit coupled to the second power allocation circuit, configured to generate a second detection signal according to the second power allocation signal;
an output circuit coupled to the first detection circuit and the second detection circuit, the output circuit comprising:
a first conversion circuit configured to convert the first detection signal into a first power current according to a first current gain;
a second conversion circuit configured to convert the second detection signal into a second power current according to a second current gain;
and
a combining circuit coupled to the first conversion circuit and the second conversion circuit, configured to receive the first power current and the second power current and generate a power signal;
a bias circuit coupled to the output terminal of the power detection circuit, configured to receive the power signal to adjust the bias signal;
and
an adjustment circuit configured to adjust at least one of impedance of the first power allocation circuit, impedance of the second power allocation circuit, impedance of the first conversion circuit, impedance of the second conversion circuit, the first current gain of the first conversion circuit, and the second current gain of the second conversion circuit.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/991,655Filed 22 Dec 2024
Priority: TW 11314632929 Nov 2024
Published: 4 Jun 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H03F 3/245
Of transmitter output stages: with semiconductor devices only
H03F 1/0266
With control of the polarisation voltage or current, e.g. gliding Class A: by using a signal derived from the input signal
H03F 1/0272
With control of the polarisation voltage or current, e.g. gliding Class A: by using a signal derived from the output signal
H03F 1/303
Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters: using a switching device