Chien T Nguyen

US Patent:

8363436, Jan 29, 2013

Filed:

Dec 5, 2010

Appl. No.:

12/960504

Inventors:

Shiju Wang - Irvine CA, US
Chien Nguyen - Huntington Beach CA, US
Hwangsoo Choi - Fullerton CA, US

Assignee:

Microsemi Corporation - Alisa Viejo CA

International Classification:

H02M 1/36

US Classification:

363 49, 307 44

Abstract:

A start up circuit constituted of: a first alternating current lead; a second alternating current lead, said second alternating current lead exhibiting an opposing phase of said first alternating current lead; a first capacitor, a first end of said first capacitor coupled to said first alternating current lead; a second capacitor, a first end of said second capacitor coupled to said second alternating current lead; a breakdown diode coupled between a second end of said first capacitor and a second end of said second capacitor; and a third capacitor coupled in parallel with said breakdown diode. A direct current power is developed across the breakdown diode without requiring dissipative elements.

US Patent:

8482218, Jul 9, 2013

Filed:

Jan 31, 2011

Appl. No.:

13/017128

Inventors:

Shiju Wang - Irvine CA, US
Chien Nguyen - Huntington Beach CA, US
Hwangsoo Choi - Fullerton CA, US
Arkadiy Peker - Glen Cove NY, US
Migel Jacubovski - Hod Hasharon, IL
Alon Ferentz - Bat Yam, IL
Dror Korcharz - Bat Yam, IL

Assignee:

Microsemi Corporation - Aliso Viejo CA

International Classification:

H05B 37/02

US Classification:

315291, 315294, 315307

Abstract:

A lighting circuit constituted of: a single dimming input; a pulse width modulation acceptance circuit arranged to convert a pulse width modulated dimming signal received at the single dimming input into a local dimming signal, the local dimming signal exhibiting a predetermined format; an analog voltage level acceptance circuit arranged to convert an analog voltage dimming signal received at the single dimming input into the local dimming signal exhibiting the predetermined format; and a luminaire driving circuit responsive to the local dimming signal.