IP Library › Granted Patent US 7,227,878
Granted Patent B1
US 7,227,878 · App. 11/330,497 · Granted Jun 5, 2007

Differential opto-electronics transmitter

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Quick Facts
Patent No.
US 7,227,878
App. No.
11/330,497
Granted
Jun 5, 2007
Kind
B1
Abstract

A system and method for biasing the outputs of a laser modulator driver while allowing for high speed operation. A differential amplifier type modulator driver is provided which uses a reduced number of components in the high speed path. Additionally, the modulator driver may be constructed with a distributed output stage.

Claims (6)

1. A differential signal driver for a laser modulator, comprising:

a differential amplifier receiving differential inputs and providing differential outputs;

a modulation current source for the differential amplifier; and

a common mode adjustment circuit coupled between the differential inputs and the modulation current source.

2. The differential signal driver for a laser modulator of claim 1 wherein the common mode adjustment circuit comprises a pair of bridging resistors coupled in series coupling the differential inputs and an operational amplifier having a first input coupled to a first node of the differential amplifier, the operational amplifier receiving at a second input a control signal, the operational amplifier having an output coupled to a node between the bridging resistors.

3. The laser modulator driver of claim 2 wherein the second input of the operation amplifier is a non-inverting input coupled to the first node of the differential amplifier.

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 →
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 →
SECURITY AGREEMENT Recorded Oct 22, 2009
From: VITESSE SEMICONDUCTOR CORPORATION
To: WHITEBOX VSC, LTD.
Reel/Frame 023401/0813 →
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 Jun 28, 2006
From: CHOI, LAWRENCE; SUN, WEIMIN
To: VITESSE SEMICONDUCTOR CORPORATION
Reel/Frame 017853/0662 →