US 12,489,405 B2 · Amplifier output stage circuitry

Abstract

An example apparatus includes: a folded cascode circuit including a first input terminal, a second input terminal, a first output terminal, and a second output terminal; a first feedback loop including a third output terminal, the third output terminal coupled to the first output terminal; a second feedback loop including a fourth output terminal, the fourth output terminal coupled to the second output terminal; and a first driver including a first control terminal and a fifth output terminal, the first control terminal coupled to the third output terminal; and a second driver including a second control terminal and a sixth output terminal, the second control terminal coupled to the fourth output terminal, the sixth output terminal coupled to the fifth output terminal.

Claims14

Dependent claims

A circuit comprising:

a first transistor having first and second terminals and a control terminal;
a second transistor having first and second terminals and a control terminal, the first terminal of the second transistor coupled to the control terminal of the first transistor;
a third transistor having first and second terminals and a control terminal;
a fourth transistor having first and second terminals and a control terminal, the first terminal of the third transistor coupled to the control terminal of the fourth transistor;
a first feedback circuit coupled to the first terminal of the fourth transistor;
and
a second feedback circuit coupled to the first terminal of the fourth transistor.

4 more elements

A circuit comprising:

a first transistor having first and second terminals and a control terminal;
a second transistor having first and second terminals and a control terminal, the control terminal of the second transistor coupled to the control terminal of the first transistor;
a third transistor having first and second terminals and a control terminal;
a fourth transistor having first and second terminals and a control terminal, the first terminal of the third transistor coupled to the control terminal of the fourth transistor;
a fifth transistor having a control terminal directly connected to the control terminal of the fourth transistor;
a sixth transistor having first terminal and second terminals, the second terminal of the sixth transistor coupled to the first terminal of the first transistor;
a seventh transistor having first and second terminals, the second terminal of the seventh transistor coupled to the first terminal of the first transistor;
and
an eighth transistor having first and second terminals, the first terminal of the eighth transistor coupled to the first terminal of the seventh transistor, the control terminal of the eighth transistor coupled to the control terminal of the seven transistor.

6 more elements

Dependencies are inferred from the claim text.

Amplifier output stage circuitry

Life of this patent

Amplifier output stage circuitry

Life of this patent

Abstract

Claims14