US 7,405,616 B2Granted

Nested transimpendance amplifier

AssigneeMarvell International Ltd.

InventorSehat Sutardja

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Abstract

A differential transimpedance amplifier circuit comprises first, second, third and fourth operational amplifiers having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output. A first feedback element communicates with the second non-inverting input and the second inverting output. A second feedback element communicates with the second inverting input and the second non-inverting output. A third feedback element communicates with the third non-inverting input and the first inverting output. A fourth feedback element communicates with the third inverting input and the first non-inverting output. A fifth feedback element communicates with the fourth inverting input and the first inverting output. A sixth feedback element communicates with the fourth non-inverting output and the first non-inverting output.

Claims16

Dependent claims

A differential transimpedance amplifier circuit comprising:

a first operational amplifier having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output;
a second operational amplifier having a second inverting input, a second non-inverting input, a second inverting output and a second non-inverting output, wherein said second inverting output communicates with the first non-inverting input and the second non-inverting output communicates with the first inverting input;
a third operational amplifier having a third inverting input, a third non-inverting input, a third inverting output and a third non-inverting output, wherein the second inverting input communicates with the third non-inverting output and the second non-inverting input communicates with the third inverting output;
a fourth operational amplifier having a fourth inverting input, a fourth non-inverting input, a fourth inverting output and a fourth non-inverting output, wherein the fourth inverting output communicates with the third non-inverting input and the fourth non-inverting output communicates with the third inverting input;
a first feedback element that communicates with the second non-inverting input and the second inverting output;
a second feedback element that communicates with the second inverting input and the second non-inverting output;
a third feedback element that communicates with the third non-inverting input and the first inverting output;
a fourth feedback element that communicates with the third inverting input and the first non-inverting output;
a fifth feedback element that communicates with the fourth inverting input and the first inverting output;
and
a sixth feedback element that communicates with the fourth non-inverting input and the first non-inverting output.

8 more elements

A differential transimpedance amplifier circuit comprising:

first amplifying means for amplifying having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output;
second amplifying means for amplifying having a second inverting input, a second non-inverting input, a second inverting output and a second non-inverting output, wherein said second inverting output communicates with the first non-inverting input and the second non-inverting output communicates with the first inverting input;
a third amplifying means for amplifying having a third inverting input, a third non-inverting input, a third inverting output and a third non-inverting output, wherein the second inverting input communicates with the third non-inverting output and the second non-inverting input communicates with the third inverting output;
a fourth amplifying means for amplifying having a fourth inverting input, a fourth non-inverting input, a fourth inverting output and a fourth non-inverting output, wherein the fourth inverting output communicates with the third non-inverting input and the fourth non-inverting output communicates with the third inverting input;
a first feedback means for providing feedback that communicates with the second non-inverting input and the second inverting output;
a second feedback means for providing feedback that communicates with the second inverting input and the second non-inverting output;
a third feedback means for providing feedback that communicates with the third non-inverting input and the first inverting output;
a fourth feedback means for providing feedback that communicates with the third inverting input and the first non-inverting output;
a fifth feedback means for providing feedback that communicates with the fourth inverting input and the first inverting output;
and
a sixth feedback means for providing feedback that communicates with the fourth non-inverting input and the first non-inverting output.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/643,432Filed 21 Dec 2006 · continuation
Priority: 13 Mar 2001
Published: US 2007/0096808 A13 May 2007
Granted: 29 Jul 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H03F 1/34
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements:…
H03F 1/08
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H03F 3/08
With semiconductor devices only: controlled by light
H03F 3/45179
Characterised by the way of implementation of the active amplifying circuit in the differential amplifier: using MOSFET transistors as the active…

Family

Application60/275,109Us provisional application · filed 13 Mar 2001
Application10/072,843Parent of this continuation-in-part · filed 6 Feb 2002
Application10/459,731Parent of this continuation-in-part · filed 11 Jun 2003
US 6,762,644 B1Parent of this continuation-in-part · filed 13 Jul 2004
Application60/759,899Us provisional application · filed 18 Jan 2006
Application60/798,480Us provisional application · filed 8 May 2006
Application60/798,567Us provisional application · filed 8 May 2006
Application60/817,268Us provisional application · filed 29 Jun 2006
Application11/495,813Parent of this continuation · filed 28 Jul 2006
US 2007/0096808 A1Pre-grant publication · published 3 May 2007
US 7,276,965 B1Parent of this continuation-in-part
Application11/495,813Parent of this continuation-in-part
US 2006/0261892 A1Published application
US 7,551,024 B2Related patent
US 7,405,616 B2This patent

From the US filing history. Foreign family members aren’t listed.