Daniel D Santiago

US Patent:

8644437, Feb 4, 2014

Filed:

Sep 8, 2011

Appl. No.:

13/227583

Inventors:

Helen H. Kim - Sudbury MA, US
Merlin R. Green - Salem MA, US
Benjamin A. Miller - Cambridge MA, US
Andrew K. Bolstad - Arlington MA, US
Andrew R. Chen - Newton MA, US
Daniel D. Santiago - Waltham MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

H04B 1/10

US Classification:

375350, 375232, 375259, 375296, 375316, 375343

Abstract:

A method for digital compensation of a nonlinear system comprises identifying a plurality of circuit parameters of a nonlinear system. Each circuit parameter determines a nonlinear response of the nonlinear system. A first circuit parameter is chosen from the plurality of circuit parameters. The first circuit parameter determines a first effect on the nonlinear response. The first effect is at least as large a second effect from a second circuit parameter from the plurality of circuit parameters. At least one stimulus is applied to the nonlinear system. The nonlinear response of the nonlinear system is measured in response to the at least one stimulus. A compensation architecture is synthesized to substantially linearize the nonlinear response. The compensation architecture receives the nonlinear response of the nonlinear system and provides a substantially linear response.

US Patent:

20060090028, Apr 27, 2006

Filed:

Sep 27, 2004

Appl. No.:

10/952454

Inventors:

Michael Anthony - Andover MA, US
Edward Kohler - Waltham MA, US
Daniel Santiago - Waltham MA, US

International Classification:

G06F 12/14

US Classification:

711100000

Abstract:

A sample-and-hold device provides output charge pairs which represent samples of a continuous-time differential input voltage. The device uses charge-coupled device elements in a symmetrical structure for splitting a constant input charge into a signal-dependent output charge pair. It is capable of operation at higher speed and with higher dynamic range than similar prior-art devices.

US Patent:

20110148484, Jun 23, 2011

Filed:

Dec 22, 2009

Appl. No.:

12/645434

Inventors:

Helen H. Kim - Sudbury MA, US
Matthew D. Cross - Bedford MA, US
Merlin R. Green - Salem MA, US
Daniel D. Santiago - Waltham MA, US

Assignee:

MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA

International Classification:

H03L 7/085
H03L 7/07

US Classification:

327148, 327156, 327157

Abstract:

Described is a frequency synthesizer having a wide output frequency range and small frequency tuning steps. In-band spurious components are maintained at low levels and phase noise is significantly reduced. The frequency synthesizer can be fabricated as an integrated circuit device having a small area and low power dissipation. The frequency synthesizer can be used in wideband frequency systems to reduce cost and size by replacing multiple frequency synthesizers each devoted to a portion of the overall system frequency range.

US Patent:

20140029658, Jan 30, 2014

Filed:

Jul 26, 2012

Appl. No.:

13/558651

Inventors:

Helen Kim - Sudbury MA, US
Merlin Green - Salem MA, US
Andrew Bolstad - Arlington MA, US
Daniel D. Santiago - Waltham MA, US
Michael N. Ericson - Waltham MA, US
Karen Gettings - Carlisle MA, US
Benjamin A. Miller - Cambridge MA, US

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

H04B 1/16
H04L 27/01
H04B 17/00

US Classification:

375229, 455334, 4552261

Abstract:

Receiver design techniques are provided that are capable of producing relatively efficient, linear radio frequency (RF) receivers. During a design process, components of an analog receiver chain and digital nonlinearity compensation techniques are considered together to achieve reduced power consumption in the receiver.

US Patent:

20140030995, Jan 30, 2014

Filed:

Jul 25, 2013

Appl. No.:

13/950706

Inventors:

Helen Kim - Sudbury MA, US
Merlin Green - Salem MA, US
Andrew Bolstad - Arlington MA, US
Daniel D. Santiago - Waltham MA, US
Michael N. Ericson - Waltham MA, US
Karen Gettings - Carlisle MA, US
Benjamin A. Miller - Cambridge MA, US

Assignee:

MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA

International Classification:

H04B 1/10
G06F 17/50

US Classification:

455295, 716102

Abstract:

Receiver design techniques are provided that are capable of producing relatively efficient, linear radio frequency (RF) receivers. During a design process, components of an analog receiver chain and digital nonlinearity compensation techniques are considered together to achieve reduced power consumption in the receiver.