US 2025/0105800 A1Published application

Methods and apparatus to improve an output of an amplifier

AssigneeTexas Instruments Incorporated

InventorsHua Shao, Paul Damitio, Bharath Karthik Vasan, Joel M. Halbert

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Abstract

An example apparatus includes: first buffer circuitry having a first terminal and a second terminal; second buffer circuitry having a first terminal and a second terminal; third buffer circuitry having a first terminal and a second terminal, the first terminal of the third buffer circuitry coupled to the first terminal of the second buffer circuitry; a first transistor having a first terminal, a second terminal and a control terminal, the first terminal of the first transistor coupled to the first terminal of the first buffer circuitry, the control terminal of the first transistor coupled to the second terminal of the second buffer circuitry; a second transistor having a first terminal and a second terminal, the first terminal of the second transistor coupled to the second terminal of the first buffer circuitry.

Claims20

Dependent claims

An amplifier comprising:

first stage circuitry including:
first buffer circuitry having a first terminal and a second terminal;
second buffer circuitry having a first terminal and a second terminal;
third buffer circuitry having a first terminal and a second terminal, the first terminal of the third buffer circuitry coupled to the first terminal of the second buffer circuitry;
a first transistor having a first terminal, a second terminal and a control terminal, the first terminal of the first transistor coupled to the first terminal of the first buffer circuitry, the control terminal of the first transistor coupled to the second terminal of the second buffer circuitry;
a second transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second transistor coupled to the second terminal of the first buffer circuitry, the control terminal of the second transistor coupled to the second terminal of the third buffer circuitry;
and
second stage circuitry having a first terminal and a second terminal, the first terminal of the second stage circuitry coupled to the second terminal of the first transistor, the second terminal of the second stage circuitry coupled to the second terminal of the second transistor.

5 more elements

An amplifier comprising:

first stage circuitry having a first terminal and a second terminal;
and
second stage circuitry including:
first current mirror circuitry having a first terminal and a second terminal, the first terminal of the first current mirror circuitry coupled to the first terminal of the first stage circuitry;
second current mirror circuitry having a first terminal and a second terminal, the first terminal of the second current mirror circuitry coupled to the second terminal of the first stage circuitry;
pre-driver circuitry having a terminal;
first buffer circuitry having a first terminal and a second terminal;
and
second buffer circuitry having a first terminal and a second terminal, the first terminal of the second buffer circuitry is coupled to the first terminal of the first buffer circuitry;
a first transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the first transistor coupled to the second terminal of the first current mirror circuitry, the control terminal of the first transistor coupled to the second terminal of the first buffer circuitry;
and
a second transistor having a first terminal, a second terminal, and a control terminal, the first terminal of the second transistor coupled to the second terminal of the second current mirror circuitry, the second terminal of the second transistor coupled to the terminal of the pre-driver circuitry and the second terminal of the first transistor, the control terminal of the second transistor coupled to the second terminal of the second buffer circuitry.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/759,086Filed 28 Jun 2024
Priority: 27 Sep 2023
Published: 27 Mar 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H03F 3/04
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements: with semiconductor devices only
H03F 3/45076
With semiconductor devices only: characterised by the way of implementation of the active amplifying circuit in the differential amplifier
H03F 3/3069
Single-ended push-pull [SEPP] amplifiers ; Phase-splitters therefor: the emitters of complementary power transistors being connected to the output
H03F 3/3432
With semiconductor devices only: with bipolar transistors