Chau D Tran

US Patent:

20150352767, Dec 10, 2015

Filed:

Nov 29, 2012

Appl. No.:

13/688296

Inventors:

Vibha Kalra - Baltimore MD, US
Chau Tran - Upper Darby PA, US

International Classification:

B29C 47/00
D01F 9/14
D01F 9/22

Abstract:

A method for producing porous nanofibers having tunable meso- and micropores, and the articles produced by the method. In some embodiments, the method comprises electrospinning a polymer blend comprising polyacrylonitrile and a sulfonated polymer dissolved in a solvent to form a fibers; heat treating the mat or web of fibers sequentially at first, second, and optionally third temperatures; and optionally treating the heat treated fibers with an oxidizing agent.

US Patent:

20140104000, Apr 17, 2014

Filed:

Oct 11, 2012

Appl. No.:

13/649264

Inventors:

- Norwood MA, US
Derek Frederick Bowers - Los Altos Hills CA, US
Oljeta Bida Qirko - North Reading MA, US
Chau C. Tran - Malden MA, US

Assignee:

Analog Devices, Inc. - Norwood MA

International Classification:

H03F 3/45

US Classification:

330257

Abstract:

An amplifier includes a bootstrap circuit for improving a linearity of the amplifier and a feed-forward circuit for modifying a voltage of the bootstrap circuit in response to a change in an input signal. Modifying the voltage using the feed-forward circuit prevents a phase-inversion condition of the amplifier.