Kenneth W Schultz

US Patent:

8605853, Dec 10, 2013

Filed:

Sep 8, 2011

Appl. No.:

13/228367

Inventors:

Kenneth I. Schultz - Lexington MA, US
Brian Tyrrell - Brookline NH, US
Michael W. Kelly - North Reading MA, US
Curtis Colonero - Shrewsbury MA, US
Lawrence M. Candell - Arlington MA, US
Daniel Mooney - Dracut MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

H03K 23/00

US Classification:

377118, 377124

Abstract:

Digital focal plane arrays (DFPAs) with multiple counters per unit cell can be used to convert analog signals to digital data and to filter the digital data. Exemplary DFPAs include two-dimensional arrays of unit cells, where each unit cell is coupled to a corresponding photodetector in a photodetector array. Each unit cell converts photocurrent from its photodetector to a digital pulse train that is coupled to multiple counters in the unit cell. Each counter in each unit cell can be independently controlled to filter the pulse train by counting up or down and/or by transferring data as desired. For example, a unit cell may perform in-phase/quadrature filtering of homodyne- or heterodyne-detected photocurrent with two counters: a first counter toggled between increment and decrement modes with an in-phase signal and a second counter toggled between increment and decrement modes with a quadrature signal.

US Patent:

20100226495, Sep 9, 2010

Filed:

Oct 29, 2007

Appl. No.:

11/978351

Inventors:

Michael Kelly - North Reading MA, US
Brian Tyrrell - Brookline NH, US
Curtis Colonero - Shrewsbury MA, US
Robert Berger - Lexington MA, US
Kenneth Schultz - Lexington MA, US
James Wey - Arlington MA, US
Daniel Mooney - Dracut MA, US
Lawrence Candell - Arlington MA, US

International Classification:

H04L 9/30
H04L 9/28

US Classification:

380 30, 380 28

Abstract:

A digital focal plane array includes an all-digital readout integrated circuit in combination with a detector array. The readout circuit includes unit cell electronics, orthogonal transfer structures, and data handling structures. The unit cell electronics include an analog to digital converter. Orthogonal transfer structures enable the orthogonal transfer of data among the unit cells. Data handling structures may be configured to operate the digital focal plane array as a data encryptor/decipherer. Data encrypted and deciphered by the digital focal plane array need not be image data.

US Patent:

20120138774, Jun 7, 2012

Filed:

Nov 18, 2011

Appl. No.:

13/299995

Inventors:

Michael Kelly - North Reading MA, US
Brian Tyrrell - Brookline NH, US
Curtis Colonero - Shrewsbury MA, US
Robert Berger - Lexington MA, US
Kenneth Schultz - Lexington MA, US
James Wey - Arlington MA, US
Daniel Mooney - Dracut MA, US
Lawrence Candell - Arlington MA, US

International Classification:

H01L 27/146

US Classification:

2502081

Abstract:

A digital focal plane array includes an all-digital readout integrated circuit in combination with a detector array. The readout circuit includes unit cell electronics, orthogonal transfer structures, and data handling structures. The unit cell electronics include an analog to digital converter. Orthogonal transfer structures enable the orthogonal transfer of data among the unit cells. Data handling structures may be configured to operate the digital focal plane array as a data encryptor/decipherer. Data encrypted and deciphered by the digital focal plane array need not be image data.

US Patent:

54471591, Sep 5, 1995

Filed:

Feb 3, 1993

Appl. No.:

8/012877

Inventors:

Kenneth I. Schultz - Somerville MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

A61B 600

US Classification:

128665

Abstract:

A system for optically imaging a specimen is provided, which system amplitude modulates an optical signal with a longer wavelength signal, and in particular a signal having a wavelength which is much longer than any dispersive phase shift in the sample. The modulated optical signal is passed through the specimen. Scattered radiation in the optical output from the sample is filtered out and the resulting optical signal is detected and processed to obtain amplitude/absorption and phase/dispersion information, which information may be used in imaging. Optical signals at different frequencies may be passed through the same sample of the specimen to obtain additional information.

US Patent:

20170026603, Jan 26, 2017

Filed:

Oct 7, 2016

Appl. No.:

15/288492

Inventors:

MICHAEL KELLY - NORTH READING MA, US
BRIAN TYRRELL - BROOKLINE NH, US
CURTIS COLONERO - SHREWSBURY MA, US
ROBERT BERGER - LEXINGTON MA, US
KENNETH SCHULTZ - LEXINGTON MA, US
JAMES WEY - ARLINGTON MA, US
DANIEL MOONEY - DRACUT MA, US
LAWRENCE CANDELL - ARLINGTON MA, US

International Classification:

H04N 5/378
H04N 5/913
H04N 21/4223
H04L 9/06
G11B 20/00
G06F 21/60
G09C 1/00
H04N 5/33
H04N 21/4408

Abstract:

A digital focal plane array includes an all-digital readout integrated circuit in combination with a detector array. The readout circuit includes unit cell electronics, orthogonal transfer structures, and data handling structures. The unit cell electronics include an analog to digital converter. Orthogonal transfer structures enable the orthogonal transfer of data among the unit cells. Data handling structures may be configured to operate the digital focal plane array as a data encryptor/decipherer. Data encrypted and deciphered by the digital focal plane array need not be image data.

US Patent:

20150381183, Dec 31, 2015

Filed:

Sep 10, 2015

Appl. No.:

14/850067

Inventors:

Kenneth I. SCHULTZ - Lexington MA, US
Brian M. TYRRELL - Brookline NH, US
Michael W. KELLY - North Reading MA, US
Curtis B. COLONERO - SHREWSBURY MA, US
Lawrence M. CANDELL - Arlington MA, US
Daniel MOONEY - Dracut MA, US

International Classification:

H03K 21/02

Abstract:

Digital focal plane arrays (DFPAs) with multiple counters per unit cell can be used to convert analog signals to digital data and to filter the digital data. Exemplary DFPAs include two-dimensional arrays of unit cells, where each unit cell is coupled to a corresponding photodetector in a photodetector array. Each unit cell converts photocurrent from its photodetector to a digital pulse train that is coupled to multiple counters in the unit cell. Each counter in each unit cell can be independently controlled to filter the pulse train by counting up or down and/or by transferring data as desired. For example, a unit cell may perform in-phase/quadrature filtering of homodyne- or heterodyne-detected photocurrent with two counters: a first counter toggled between increment and decrement modes with an in-phase signal and a second counter toggled between increment and decrement modes with a quadrature signal.

US Patent:

20140321600, Oct 30, 2014

Filed:

Nov 6, 2013

Appl. No.:

14/073338

Inventors:

KENNETH I. SCHULTZ - LEXINGTON MA, US
BRIAN TYRRELL - BROOKLINE NH, US
MICHAEL W. KELLY - NORTH READING MA, US
CURTIS COLONERO - SHREWSBURY MA, US
LAWRENCE M. CANDELL - ARLINGTON MA, US
DANIEL MOONEY - DRACUT MA, US

Assignee:

MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA

International Classification:

G11C 19/00
H03M 1/60
H03M 1/12
H03K 21/02
H03M 1/00

US Classification:

377118

Abstract:

Digital focal plane arrays (DFPAs) with multiple counters per unit cell can be used to convert analog signals to digital data and to filter the digital data. Exemplary DFPAs include two-dimensional arrays of unit cells, where each unit cell is coupled to a corresponding photodetector in a photodetector array. Each unit cell converts photocurrent from its photodetector to a digital pulse train that is coupled to multiple counters in the unit cell. Each counter in each unit cell can be independently controlled to filter the pulse train by counting up or down and/or by transferring data as desired. For example, a unit cell may perform in-phase/quadrature filtering of homodyne- or heterodyne-detected photocurrent with two counters: a first counter toggled between increment and decrement modes with an in-phase signal and a second counter toggled between increment and decrement modes with a quadrature signal.

US Patent:

20140197303, Jul 17, 2014

Filed:

Mar 21, 2014

Appl. No.:

14/221429

Inventors:

MICHAEL KELLY - NORTH READING MA, US
BRIAN TYRRELL - BROOKLINE NH, US
CURTIS COLONERO - SHREWSBURY MA, US
ROBERT BERGER - LEXINTON MA, US
KENNETH SCHULTZ - LEXINGTON MA, US
JAMES WEY - ARLINGTON MA, US
DANIEL MOONEY - DRACUT MA, US
LAWRENCE CANDELL - ARLINGTON MA, US

International Classification:

H04N 5/378

US Classification:

2502081

Abstract:

A digital focal plane array includes an all-digital readout integrated circuit in combination with a detector array. The readout circuit includes unit cell electronics, orthogonal transfer structures, and data handling structures. The unit cell electronics include an analog to digital converter. Orthogonal transfer structures enable the orthogonal transfer of data among the unit cells. Data handling structures may be configured to operate the digital focal plane array as a data encryptor/decipherer. Data encrypted and deciphered by the digital focal plane array need not be image data.