Compensation circuit for amplifiers having multiple stages
AssigneeMarvell International Ltd.
InventorFarbod Aram
Life of this patent
Estimating the term…
Abstract
An amplifier circuit comprises a first capacitance having one end that communicates with an input of a first amplifier stage. An amplifier has a first gain, an input that communicates with an opposite end of the first capacitance, and an output. A second capacitance has a first end that communicates with the output of the amplifier and an opposite end that communicates with an input of a second amplifier stage. A broadband buffer has an input that communicates with the output of the amplifier and an output that communicates with the one end of the second capacitance.
Claims12
An amplifier circuit comprising:
- a first capacitance having one end that communicates with an input of a first amplifier stage;
- an amplifier having a first gain, an input that communicates with an opposite end of said first capacitance, and an output;
- and
- a second capacitance having a first end that communicates with said output of said amplifier and an opposite end that communicates with an input of a second amplifier stage;
- and
- a first impedance having one end that communicates with the input of the first amplifier stage and an opposite end that communicates with an output of the second amplifier stage.
An amplifier circuit comprising:
- a first capacitance having one end that communicates with an input of a first amplifier stage;
- an amplifier having a first gain, an input that communicates with an opposite end of said first capacitance, and an output and that includes:
- a current source;
- and
- a transimpedance amplifier having an output and an input that communicates with said current source;
- and
- a second capacitance having a first end that communicates with said output of said amplifier and an opposite end that communicates with an input of a second amplifier stage,
- wherein said current source includes:
- a first transistor including a control terminal and first and second terminals;
- a bias resistance having one end that communicates with said control terminal of said first transistor and an opposite end that communicates with said first terminal of said first transistor;
- and
- a current source that communicates with said first terminal.
An amplifier circuit comprising:
- a first capacitance having one end that communicates with an input of a first amplifier stage;
- an amplifier having a first gain, an input that communicates with an opposite end of said first capacitance, and an output and that includes:
- a current source;
- and
- a transimpedance amplifier having an output and an input that communicates with said current source;
- and
- a second capacitance having a first end that communicates with said output of said amplifier and an opposite end that communicates with an input of a second amplifier stage,
- wherein said transimpedance amplifier includes:
- a first transistor having a control terminal and first and second terminals;
- a feedback resistance having one end that communicates with said control terminal and an opposite end that communicates with said first terminal;
- and
- a current source that communicates with said first terminal.
An amplifier circuit comprising:
- a first capacitance having one end that communicates with an input of a first amplifier stage;
- an amplifier having a first gain, an input that communicates with an opposite end of said first capacitance, and an output;
- a second capacitance having a first end that communicates with said output of said amplifier and an opposite end that communicates with an input of a second amplifier stage;
- and
- a broadband buffer having an input that communicates with said output of said amplifier and an output that communicates with said one end of said second capacitance.
Dependencies are inferred from the claim text.