IP Library › Granted Patent US 7,305,190
Granted Patent B2
US 7,305,190 · App. 10/841,948 · Granted Dec 4, 2007

Optical dispersion correction in transimpedance amplifiers

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Quick Facts
Patent No.
US 7,305,190
App. No.
10/841,948
Granted
Dec 4, 2007
Kind
B2
Abstract

A transimpedance amplifier having adjustment for optical distortion in an optical communication link. The transimpedance amplifier comprises a transimpedance stage and a post amplifier stage, which has a feedback path including an optical distortion adjustment circuit.

Claims (16)

1. A transimpedance amplifier having adjustment for optical distortion, the transimpedance amplifier comprising:

a transimpedance stage;

a post amplifier stage coupled to the transimpedance stage, the post amplifier stage comprising a plurality of post amplifiers coupled in series; and

the post amplifier stage having a feedback path including an optical distortion adjustment circuit;

wherein the optical distortion adjustment circuit comprises a differential voltage balance circuit and a feedback buffer.

2. The transimpedance amplifier of claim 1 , wherein the differential voltage balance circuit comprises a plurality of variable current sources modifying a switching threshold of the post amplifier stage.

3. The transimpedance amplifier of claim 2 , wherein the plurality of variable current sources are programmable.

4. The transimpedance amplifier of claim 2 , wherein the plurality of variable current sources are manually controlled.

5. The transimpedance amplifier of claim 2 , wherein each of the variable current sources comprises:

an external resistor;

a bandgap circuit;

a first current mirror;

a feedback current mirror coupled to the first current mirror; and

a transistor coupling the external resistor, the bandgap circuit and the first current mirror.

6. The transimpedance amplifier of claim 5 , wherein the feedback current mirror is driven by the first current mirror.

7. The transimpedance amplifier of claim 5 , wherein the feedback current mirror is coupled to the feedback path.

Assignments (18)
RELEASE OF SECURITY INTEREST Recorded Mar 9, 2022
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059358/0001 →
RELEASE OF SECURITY INTEREST Recorded Feb 25, 2022
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 059333/0222 →
SECURITY INTEREST Recorded Sep 18, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS NOTES COLLATERAL AGENT
Reel/Frame 047103/0206 →
SECURITY INTEREST Recorded Jun 25, 2018
From: MICROCHIP TECHNOLOGY INCORPORATED; SILICON STORAGE TECHNOLOGY, INC.; ATMEL CORPORATION; MICROSEMI CORPORATION; MICROSEMI STORAGE SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 046426/0001 →
RELEASE OF SECURITY INTEREST Recorded May 29, 2018
From: MORGAN STANLEY SENIOR FUNDING, INC.
To: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.), INC.; MICROSEMI FREQUENCY AND TIME CORPORATION; MICROSEMI COMMUNICATIONS, INC.; MICROSEMI SOC CORP.; MICROSEMI CORP. - POWER PRODUCTS GROUP; MICROSEMI CORP. - RF INTEGRATED SOLUTIONS
Reel/Frame 046251/0391 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 22, 2017
From: MICROSEMI COMMUNICATIONS, INC.
To: MICROSEMI STORAGE SOLUTIONS, INC.
Reel/Frame 042523/0577 →
PATENT SECURITY AGREEMENT Recorded Feb 3, 2016
From: MICROSEMI CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC. (F/K/A LEGERITY, INC., ZARLINK SEMICONDUCTOR (V.N.) INC., CENTELLAX, INC., AND ZARLINK SEMICONDUCTOR (U.S.) INC.); MICROSEMI FREQUENCY AND TIME CORPORATION (F/K/A SYMMETRICON, INC.); MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION); MICROSEMI SOC CORP. (F/K/A ACTEL CORPORATION); MICROSEMI CORP. - POWER PRODUCTS GROUP (F/K/A ADVANCED POWER TECHNOLOGY INC.); MICROSEMI CORP. - RF INTEGRATED SOLUTIONS (F/K/A AML COMMUNICATIONS, INC.)
To: MORGAN STANLEY SENIOR FUNDING, INC.
Reel/Frame 037691/0697 →
RELEASE OF SECURITY INTEREST Recorded Jan 19, 2016
From: BANK OF AMERICA, N.A.
To: MICROSEMI CORPORATION; MICROSEMI CORP.-ANALOG MIXED SIGNAL GROUP, A DELAWARE CORPORATION; MICROSEMI SOC CORP., A CALIFORNIA CORPORATION; MICROSEMI SEMICONDUCTOR (U.S.) INC., A DELAWARE CORPORATION; MICROSEMI FREQUENCY AND TIME CORPORATION, A DELAWARE CORPORATION; MICROSEMI COMMUNICATIONS, INC. (F/K/A VITESSE SEMICONDUCTOR CORPORATION), A DELAWARE CORPORATION; MICROSEMI CORP.-MEMORY AND STORAGE SOLUTIONS (F/K/A WHITE ELECTRONIC DESIGNS CORPORATION), AN INDIANA CORPORATION
Reel/Frame 037558/0711 →
MERGER AND CHANGE OF NAME Recorded May 13, 2015
From: VITESSE SEMICONDUCTOR CORPORATION; LLIU100 ACQUISITION CORP.
To: MICROSEMI COMMUNICATIONS, INC.
Reel/Frame 035651/0708 →
SUPPLEMENTAL SECURITY AGREEMENT Recorded Apr 29, 2015
From: MICROSEMI COMMUNICATIONS, INC.
To: BANK OF AMERICA, N.A., AS COLLATERAL AGENT
Reel/Frame 035532/0925 →
RELEASE OF SECURITY INTEREST Recorded Apr 28, 2015
From: WHITEBOX VSC, LTD.
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 035526/0090 →
RELEASE OF SECURITY INTEREST Recorded Nov 5, 2014
From: US BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 034176/0162 →
SECURITY AGREEMENT Recorded Dec 9, 2009
From: VITESSE SEMICONDUCTOR CORPORATION
To: WHITEBOX VSC, LTD.
Reel/Frame 023627/0079 →
COLLATERAL ASSIGNMENT (INTELLECTUAL PROPERTY) Recorded Nov 5, 2009
From: VITESSE SEMICONDUCTOR CORPORATION
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 023471/0267 →
RELEASE OF SECURITY INTEREST Recorded Oct 29, 2009
From: OBSIDIAN, LLC
To: VITESSE SEMICONDUCTOR CORPORATION; VLTESSE INTERNATIONAL, INC.; VITESSE MANUFACTURING & DEVELOPMENT CORPORATION; VITESSE SEMICONDUCTOR SALES CORPORATION
Reel/Frame 023438/0587 →
RELEASE OF SECURITY INTEREST Recorded Oct 14, 2009
From: OBSIDIAN, LLC
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 023373/0053 →
SECURITY AGREEMENT Recorded Jun 29, 2006
From: VITESSE SEMICONDUCTOR CORPORATION
To: OBSIDIAN, LLC, AS COLLATERAL AGENT
Reel/Frame 017846/0847 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2004
From: MAYAMPURATH, BALAGOPAL; MOON, BYUNG-JONG; CHAN, ALLAN; MASSEY, BRUCE
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 014891/0921 →