Steven Chan

US Patent:

7015765, Mar 21, 2006

Filed:

Jul 26, 2004

Appl. No.:

10/898743

Inventors:

Kenneth Shepard - Ossining NY, US
Steven Chan - Yonkers NY, US

Assignee:

The Trustees of Columbia in the City of New York - New York NY

International Classification:

H03B 5/18
G06F 1/04

US Classification:

331117D, 331 2, 331 36 C, 331 56, 331 96, 331177 V, 713500

Abstract:

A circuit for distributing a clock signal in an integrated circuit includes a capacitive clock distribution circuit having at least conductor therein. At least one inductor is formed in a metal layer of the integrated circuit and is coupled to the clock distribution circuit. The inductor, generally in the form of a number of spiral inductors distributed throughout the integrated circuit, provides an inductance value selected to resonate with the capacitive clock distribution circuit. By operating the clock distribution circuit at resonance, power dissipation is reduced while skew and jitter performance can be improved.

US Patent:

7145408, Dec 5, 2006

Filed:

Jan 13, 2003

Appl. No.:

10/501278

Inventors:

Kenneth Shepard - Ossining NY, US
Steven Chan - Yonkers NY, US

Assignee:

The Trustees of Columbia University in the City of New York - New York NY

International Classification:

H03B 5/12

US Classification:

331117D, 337117 R, 337117 FE, 337167, 337117 DP

Abstract:

A circuit for distributing a clock signal in an integrated circuit includes a capacitive clock distribution circuit. At least one additional inductor is formed in a metal layer of the integrated circuit and is coupled to the clock distribution circuit. The inductor, which may distributed throughout the integrated circuit, has an inductance value selected to resonate with impedance of the capacitive clock distribution circuit. By operating the clock distribution circuit at resonance, power dissipation is reduced while skew and jitter performance can be improved.

US Patent:

7880551, Feb 1, 2011

Filed:

Dec 29, 2006

Appl. No.:

12/159750

Inventors:

Steven Chan - Yonkers NY, US
Kenneth L. Shepard - Ossining NY, US
Zheng Xu - Staten Island NY, US

Assignee:

The Trustees of Columbia University in the City of New York - New York NY

International Classification:

G06F 1/00
H03B 5/00
H03B 5/18
H03L 5/00
H03L 7/00
H03L 7/099
H03L 7/24

US Classification:

331 55, 331 2, 331 96, 331117 D, 331179, 331183, 713500, 713503

Abstract:

Systems and methods for distributing a clock signal are disclosed. In some embodiments, systems for distributing a clock signal include a plurality of resonant oscillators, each comprising an inductor; and a differential clock grid that distributes the clock signal. The differential clock grid is coupled to the plurality of resonant oscillators and the clock signal, and the inductances of the inductors are configured such that a resonant frequency of the plurality of resonant oscillators is substantially equal to the frequency of the clock signal.

US Patent:

49804081, Dec 25, 1990

Filed:

Oct 2, 1989

Appl. No.:

7/415672

Inventors:

Steven Y. Chan - Belleville NJ

Assignee:

BASF Corporation - Parsippany NJ

International Classification:

C09F 100
C09F 104
C08L 5100

US Classification:

524504

Abstract:

The invention relates to novel water-based surface and lamination printing ink compositions and to their use as surface printing inks for printing onto substrates and in particular for printing onto plastic substrates. The surface printing inks of the present invention are superior in printing aptitude and color strength.