Michael J Gambuzza

7139528, Nov 21, 2006

Jun 2, 2003

10/452711

Michael J. Gambuzza - Pepperell MA, US

Intel Corporation - Santa Clara CA

H04B 7/00

455 412, 4555561, 455557, 379405, 379412, 379413, 375257

A data access arrangement (DAA) circuit for an item of customer premise equipment (CPE, i. e. , telephone terminal equipment) utilizes RF coupling across an isolation barrier between two sides of the DAA circuit.

7957001, Jun 7, 2011

Oct 10, 2008

12/249156

Xiaoyong Liu - Malden MA, US
John McKinley Poole - Maynard MA, US
Yufeng Huang - North Chelmsford MA, US
Daniel M. Stearns - Canton MA, US
Michael J. Gambuzza - Pepperell MA, US
Gene Smith Berkowitz - Sudbury MA, US
Anthony Kowal - Berlin MA, US
Hejie Li - Schenectady NY, US
Shawn D. Wehe - Niskayuna NY, US

GE Infrastructure Sensing, Inc. - Billerica MA

G01N 21/31

356435, 250345

In one embodiment of the spectroscopy method, the method comprises the steps of modulating the wavelength of a monochromatic radiation at a modulation amplitude and a modulation frequency; determining a first variable representative of an absorbance of an analyte in a sample; and demodulating by phase-sensitive detection the first variable at a harmonic of the modulation frequency to produce a harmonic spectrum of the analyte. In one embodiment of the spectroscopy apparatus, the apparatus comprises a laser diode integrated with a first photodetector configured to detect an intensity of a backward emission from the laser diode and act as a reference detector; a second photodetector configured to detect an intensity of laser radiation exiting a sample; and electronic circuitry coupled to the laser diode and the photodetectors, configured to acquire and process spectra of the sample. In another embodiment, the spectroscopy apparatus comprises a beam splitter configured to split the laser radiation into a first radiation portion and a second radiation portion and a first photodetector configured to detect the intensity of the first radiation portion.

59463945, Aug 31, 1999

Jun 12, 1997

8/873674

Michael J. Gambuzza - Boston MA

C. P. Clare Corporation - Beverly MA

H04M 100
H04M 1100

379399

An isolation amplifier circuit with hook switch control includes first and second amplifier stages optically isolated from and coupled to each other. A biasing circuit is optically coupled to the amplifier to provide a switchable prebias to the amplifier to allow the amplifier to process bipolar voltage input signals. A hook switch circuit is coupled to the biasing circuit such that as the bias condition is switched, the hook switch is opened or closed. The same optical coupling circuitry can be used to couple the first and second amplifier stages and to couple the biasing circuit to the hook switch circuit such that savings in circuit space and cost are realized.

62263315, May 1, 2001

Sep 23, 1999

9/404006

Michael J. Gambuzza - Boston MA

C. P. Clare Corporation - Beverly MA

H04L 2500

375258

An improved line interface device and an improved xDSL modem for use in connecting data communications equipment to a xDSL line is disclosed. The line interface device provides the required isolation between the xDSL line and the communications equipment using optical isolation or capacitive techniques, as well as provides the power necessary to produce the transmit signal levels required by the communications services by utilizing a switching power supply deriving its power from a source isolated from the line, and including a transformer for isolating the source from the xDSL line. By switching at high frequencies the size of the transformer can be sufficiently small so that the interface device and supply can be provided in accordance with small form factor requirements.

20200295715, Sep 17, 2020

Mar 15, 2019

16/354407

- Chicago IL, US
Michael Gambuzza - Boston MA, US

LITTELFUSE, INC. - Chicago IL

H03F 3/08
H03M 1/66
H03K 5/24

An amplifier circuit may include an isolated amplifier circuit, disposed on a high voltage side of the amplifier circuit, and arranged to generate an isolated output signal. The amplifier circuit may include a first optocoupler circuit, disposed to receive the isolated output signal from the isolated amplifier circuit and an output amplifier circuit, disposed on a low voltage side of the amplifier circuit, and coupled to receive an optical output signal from the optocoupler circuit. The amplifier circuit may also include a calibration circuit, coupled to the output amplifier circuit, to generate a calibration initiation signal, and a second optocoupler circuit, disposed to receive the calibration initiation signal, and to output a switch signal, wherein a reference voltage is output to the isolated amplifier circuit.

20140161468, Jun 12, 2014

Dec 7, 2012

13/708692

- Schenectady NY, US
Michael Joseph Gambuzza - Pepperell MA, US
Alexander Charles Brindle - Medford MA, US

General Electric Company - Schenectady NY

H04B 10/00

398140, 250551

An optical isolation system and assembly includes LEDs and photodiodes separated by an electrical isolation gap. A cover including a plurality of compartments physically encompasses each LED and photodiode pair.