US 2025/0047246 A1Published application

Amplifier circuit

OwnerRajendrakumar JOISHinventor

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Abstract

An amplifier circuit includes first and second transistors, and a first current source. The first current source is coupled to first terminals of the first and second transistors. The first current source includes a second current source, and third, fourth, fifth, and sixth transistors. The third transistor has a first terminal coupled to a first terminal of the fourth transistor, and a control terminal coupled to a control terminal of the first transistor. The fourth transistor has a control terminal coupled to a control terminal of the second transistor. The fifth transistor has a first terminal coupled to a first terminal of the sixth transistor, a second terminal coupled to the second current source and to the second terminals of the third, fourth, and sixth transistors, and a control terminal coupled to a control terminal of the sixth transistor.

Claims20

Dependent claims

An amplifier circuit comprising:

a first transistor having a first terminal and a control terminal;
a second transistor having a first terminal coupled to the first terminal of the first transistor, and having a control terminal;
a first current source coupled to the first terminal of the first transistor, the first current source including:
a second current source;
a third transistor having a first terminal coupled to the first terminal of the first transistor, having a second terminal coupled to the second current source, and having a control terminal coupled to the control terminal of the first transistor;
a fourth transistor having a first terminal coupled to the first terminal of the third transistor, having a second terminal coupled to the second current source, and having a control terminal coupled to the control terminal of the second transistor;
a fifth transistor having a first terminal, having a second terminal coupled to the second current source, and having a control terminal;
and
a sixth transistor having a first terminal coupled to the first terminal of the fifth transistor, having a second terminal coupled to the second current source, and having a control terminal coupled to the control terminal of the fifth transistor.

6 more elements

An amplifier circuit comprising:

a differential pair including:
a first transistor having a control terminal;
and
a second transistor having a control terminal;
and
an intermodulation current generator including:
a first current source;
a first transistor pair including:
a third transistor having a first terminal, having a second terminal coupled to the first current source, and having a control terminal coupled to the control terminal of the first transistor;
and
a fourth transistor having a first terminal coupled to the first terminal of the third transistor, having a second terminal coupled to the first current source, and having a control terminal coupled to the control terminal of the second transistor;
a second transistor pair including:
a fifth transistor having a first terminal, having a second terminal coupled to the first current source, and having a control terminal;
a sixth transistor having a first terminal coupled to the first terminal of the fifth transistor, having a second terminal coupled to the first current source, and having a control terminal coupled to the control terminal of the fifth transistor;
and
a voltage summing circuit including:
a first resistor having a first terminal coupled to the control terminal of the first transistor, and having a second terminal coupled to the control terminal of the fifth transistor;
and
a second resistor having a first terminal coupled to the control terminal of the second transistor, and having a second terminal coupled to the second terminal of the first resistor.

16 more elements

A receiver circuit comprising:

a band pass filter (BPF);
an analog-to-digital converter (ADC);
and
an amplifier coupled between the BPF and the ADC, the amplifier including:
a differential pair including:
a first transistor having a control terminal;
and
a second transistor having a control terminal;
and
an intermodulation current generator including:
a first current source;
a first transistor pair including:
a third transistor having a first terminal, having a second terminal coupled to the first current source, and having a control terminal coupled to the control terminal of the first transistor;
and
a fourth transistor having a first terminal coupled to the first terminal of the third transistor, having a second terminal coupled to the first current source, and having a control terminal coupled to the control terminal of the second transistor;
and
a second transistor pair including:
a fifth transistor having a first terminal, having a second terminal coupled to the first current source, and having a control terminal;
and
a sixth transistor having a first terminal coupled to the first terminal of the fifth transistor, having a second terminal coupled to the first current source, and having a control terminal coupled to the control terminal of the fifth transistor.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/362,017Filed 31 Jul 2023
Published: 6 Feb 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H03F 1/26
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H03F 1/3211
Modifications of amplifiers to reduce non-linear distortion: in differential amplifiers
H03F 3/45183
Using MOSFET transistors as the active amplifying circuit: long tailed pairs
H03F 2200/165
Indexing scheme relating to amplifiers: a filter circuit coupled to the input of an amplifier