Ton V Nguyen, 7211583 Nitta, Tustin, CA 92782

6281765, Aug 28, 2001

Mar 9, 1999

9/265559

Basil Wahid Hakki - Allentown PA
Ton Van Nguyen - Breinigsville PA

Agere Systems Optoelectronics Guardian Corp. - Orlando FL

H03H 730
H01D 900

333156

A non-mechanical electrically adjustable delay device which does not suffer from interruptions in impedance inherent in multiple-tap delay lines. The wide band electrical delay line is capable of delaying a wide band of signals without significant distortion, e. g. , up into the microwave range, and allows continuous transmission of a signal between the input port and the output port. The exemplary wide band electrical delay line comprises two transmission lines, preferably parallel to one another, and having different propagation velocities. A plurality of electrical cross connect circuits are connected between the two transmission lines. The electrical cross connect circuits are spaced along the lengths of the two transmission lines, e. g. , preferably to form evenly spaced distances therebetween. The total delay through the wide band electrical delay line is adjusted by selectively activating an appropriate one of the plurality of cross connect circuits between the two transmission lines.

5448629, Sep 5, 1995

Oct 14, 1993

8/136358

Fridolin L. Bosch - Bethlehem PA
Ton V. Nguyen - Bethlehem PA

AT&T Corp. - Murray Hill NJ

H04B 1004

359187

An amplitude control scheme for a high bit rate digital optical transmitter is disclosed. The data to be transmitted by the laser is pulse-width modulated by a low frequency signal. The pulse-width modulated signal is applied to the laser via a laser driver and to a mark density reference generator. The magnitude of the low frequency components from the mark density reference generator is a signal indicative of the desired amplitude of the laser light pulses. A back-face photodiode converts a portion of the laser light into an electrical signal, the magnitude of the low frequency portion thereof being a signal indicative of the actual amplitude of the laser light pulses. The actual amplitude of the laser light pulses is compared to the desired amplitude and the laser driver output amplitude may then adjusted to compensate for variations in the laser performance.

5373387, Dec 13, 1994

Oct 14, 1993

8/136503

Fridolin L. Bosch - Bethlehem PA
Ton V. Nguyen - Bethlehem PA

AT&T Corp. - Murray Hill NJ

H04B 1004

359187

An amplitude control scheme for a high bit rate digital optical transmitter is disclosed. The data to be transmitted by the laser is pulse-width modulated by a low frequency signal. The pulse-width modulated signal is applied to the laser via a laser driver and to a mark density reference generator. The magnitude of the low frequency components from the mark density reference generator is a signal indicative of the desired amplitude of the laser light pulses. A back-face photodiode converts a portion of the laser light into an electrical signal, the magnitude of the low frequency portion thereof being a signal indicative of the actual amplitude of the laser light pulses. The actual amplitude of the laser light pulses is computed to the desired amplitude and the laser driver output amplitude may then adjusted to compensate for variations in the laser performance.

2020021, Jul 9, 2020

Apr 19, 2019

16/389747

Ton Nguyen - Westminster CA, US

A24F 47/00
A61M 15/00
A61M 11/04

An improved vaporizer including a capsule having a reservoir configured to hold a substance intended to be vaporized. The capsule includes and a centrally aligned mouthpiece, chimney, and heating coil. The heating coil configured to be heated to a predetermined temperature, wherein the predetermined temperature vaporizes the substance. The capsule advantageously provides at least one wedge surface positioned in the reservoir. The wedge surface is configured to continuously feed the substance towards the heating coil.