US 2024/0405734 A1Published application

Temperature compensation bias circuit and power amplifier

AssigneeLansus Technologies Inc.

InventorsWEI ZHU, JIASHUAI GUO

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Abstract

A temperature compensation bias circuit is provided, including a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a second capacitor, a third capacitor, a fifth capacitor, a fifth transistor, a sixth transistor, and a seventh transistor. A power amplifier is further provided, the power amplifier applies the temperate compensation bias circuit. Compared with the prior art, there are fewer effects on a bias point of the temperature compensation bias circuit when the temperature compensation bias circuit and the power amplifier are in RF operating states, the power amplifier is enabled to have good temperature compensation effect and high linearity.

Claims7

Dependent claims

A temperature compensation bias circuit, for providing a bias current for a power amplifier, comprising:

a third resistor;
a fourth resistor;
a fifth resistor;
a sixth resistor;
a seventh resistor;
a second capacitor;
a third capacitor;
a fifth capacitor;
a fifth transistor;
a sixth transistor;
and
a seventh transistor;
wherein a first terminal of the third resistor is respectively connected to a first terminal of the fourth resistor and a voltage reference;
wherein a second terminal of the third resistor is respectively connected to a first terminal of the fifth capacitor and a base of the fifth transistor;
wherein a second terminal of the fifth capacitor is connected to ground;
wherein a second terminal of the fourth resistor is respectively connected to a collector of the fifth transistor, a first terminal of the third capacitor, a base of the seventh transistor, a first terminal of the second capacitor, and a collector of the sixth transistor;
wherein a second terminal of the third capacitor is connected to the ground;
wherein a second terminal of the second capacitor is connected to a first terminal of the fifth resistor;
wherein a second terminal of the fifth resistor is respectively connected to a base of the sixth transistor and a first terminal of the sixth resistor;
wherein an emitter of the sixth transistor is connected to the ground;
wherein an emitter of the fifth transistor is respectively connected to an emitter of the seventh transistor, a second terminal of the sixth resistor, and a first terminal of the seventh resistor;
wherein a collector of the seventh transistor is connected to a battery voltage;
and
wherein a second terminal of the seventh resistor serves as an output terminal of the temperature compensation bias circuit.

21 more elements

A power amplifier, comprising:

a temperature compensation bias circuit for providing a bias current;
wherein a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a second capacitor, a third capacitor, a fifth capacitor, a fifth transistor, a sixth transistor, and a seventh transistor;
a first terminal of the third resistor is respectively connected to a first terminal of the fourth resistor and a voltage reference, a second terminal of the third resistor is respectively connected to a first terminal of the fifth capacitor and a base of the fifth transistor, a second terminal of the fifth capacitor is connected to ground, a second terminal of the fourth resistor is respectively connected to a collector of the fifth transistor, a first terminal of the third capacitor, a base of the seventh transistor, a first terminal of the second capacitor, and a collector of the sixth transistor, a second terminal of the third capacitor is connected to the ground, a second terminal of the second capacitor is connected to a first terminal of the fifth resistor, a second terminal of the fifth resistor is respectively connected to a base of the sixth transistor and a first terminal of the sixth resistor, an emitter of the sixth transistor is connected to the ground, an emitter of the fifth transistor is respectively connected to an emitter of the seventh transistor, a second terminal of the sixth resistor, and a first terminal of the seventh resistor, a collector of the seventh transistor is connected to a battery voltage, and a second terminal of the seventh resistor serves as an output terminal of the temperature compensation bias circuit.

Dependencies are inferred from the claim text.

Facts

Application: 18/806,715Filed 16 Aug 2024
Priority: CN 202221383893.91 Jun 2022
Published: 5 Dec 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H03F 1/302
Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters: in bipolar transistor…
H03F 3/245
Of transmitter output stages: with semiconductor devices only
H03F 1/32
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H03F 3/195
With semiconductor devices only: in integrated circuits

Family

Application18/806,715Continuation
US 12,255,591 B2Related patent
US 2024/0405734 A1This patent

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

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