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US 7,605,649 B2Granted
Nested transimpedance amplifier
AssigneeMarvell World Trade Ltd.
InventorSehat Sutardja
Life of this patent
Estimating the term…
Abstract
A transimpedance amplifier comprises a first operational amplifier having an input and an output. A second operational amplifier has an input and an output that communicates with the input of the first operational amplifier. A first feedback element has one end that communicates with the input of the first operational amplifier and another end that communicates with the output of the first operational amplifier, wherein the first feedback element comprises a first capacitance. A second feedback element communicates with the input of the first operational amplifier and another end that communicates with the output of the first operational amplifier.
Claims30
A transimpedance amplifier comprising:
- a first operational amplifier having an input and an output;
- a second operational amplifier having an input and an output that directly communicates with said input of said first operational amplifier;
- a first feedback element having one end that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier, wherein said first feedback element comprises a first capacitance;
- and
- a second feedback element that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier.
2 more elements
A transimpedance amplifier comprising:
- a first operational amplifier having an input and an output;
- a second operational amplifier having an input and an output that communicates with said input of said first operational amplifier;
- a first feedback element having one end that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier, wherein said first feedback element comprises a first capacitance;
- and
- a second feedback element that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier,
- wherein the second feedback element comprises a first resistance in series with a first inductance.
3 more elements
A transimpedance amplifier comprising:
- a first operational amplifier having an input and an output;
- a second operational amplifier having an input and an output that communicates with said input of said first operational amplifier;
- a first feedback element having one end that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier, wherein said first feedback element comprises a first capacitance;
- and
- a second feedback element that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier,
- wherein said first feedback element further comprises a first resistance in series with said first capacitance, and wherein said second feedback element comprises a first inductance in parallel with a second resistance.
3 more elements
A transimpedance amplifier comprising:
- first amplifying means for amplifying having an input and an output;
- second amplifying means for amplifying having an input and an output that directly communicates with said input of said first amplifying means;
- first feedback means for providing feedback having one end that communicates with said input of said first amplifying means and another end that communicates with said output of said first amplifying means, wherein said first feedback means comprises first capacitance means for providing capacitance;
- and
- second feedback means for providing feedback having one end that communicates with said input of said first amplifying means and another end that communicates with said output of said first amplifying means.
2 more elements
A transimpedance amplifier comprising:
- first amplifying means for amplifying having an input and an output;
- second amplifying means for amplifying having an input and an output that communicates with said input of said first amplifying means;
- first feedback means for providing feedback having one end that communicates with said input of said first amplifying means and another end that communicates with said output of said first amplifying means, wherein said first feedback means comprises first capacitance means for providing capacitance;
- and
- second feedback means for providing feedback having one end that communicates with said input of said first amplifying means and another end that communicates with said output of said first amplifying means,
- wherein the second feedback means comprises first resistance means for providing resistance in series with first inductance means for providing inductance.
3 more elements
A transimpedance amplifier comprising:
- first amplifying means for amplifying having an input and an output;
- second amplifying means for amplifying having an input and an output that communicates with said input of said first amplifying means;
- first feedback means for providing feedback having one end that communicates with said input of said first amplifying means and another end that communicates with said output of said first amplifying means, wherein said first feedback means comprises first capacitance means for providing capacitance;
- and
- second feedback means for providing feedback having one end that communicates with said input of said first amplifying means and another end that communicates with said output of said first amplifying means,
- wherein said first feedback means further comprises first resistance means for providing resistance in series with said first capacitance means, and wherein said second feedback means comprises first inductance means for providing inductance in parallel with second resistance means for providing resistance.
3 more elements
A circuit comprising:
- a transimpedance amplifier comprising:
- a first operational amplifier having an input and an output;
- a second operational amplifier having an input and an output that communicates with said input of said first operational amplifier;
- a first feedback element having one end that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier, wherein said first feedback element comprises a first capacitance;
- and
- a second feedback element that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier,
- wherein said first operational amplifier, said first feedback element, and said second feedback element perform as a transimpedance stage.
4 more elements
A transimpedance amplifier comprising:
- a first operational amplifier having an input and an output;
- a second operational amplifier having an input and an output that communicates with said input of said first operational amplifier;
- a first feedback element having one end that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier, wherein said first feedback element comprises a first capacitance;
- and
- a second feedback element that communicates with said input of said first operational amplifier and another end that communicates with said output of said first operational amplifier,
- wherein input of said second operational amplifier is an input of the transimpedance amplifier, and
- wherein said output of said second operational amplifier is a current signal that is provided to said first operational amplifier.
4 more elements
Dependencies are inferred from the claim text.