Title:
DIMMER CONDUCTION ANGLE DETECTION CIRCUIT AND SYSTEM INCORPORATING THE SAME
Document Type and Number:
WIPO Patent Application WO/2011/149866
Kind Code:
A3
Abstract:
A conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit includes a comparator having a first input and a second input, and configured to provide a pulse-width modulated output in response to comparison of signals at the first input with signals at the second input. The output has a pulse width representative of a dimmer setting of a dimmer circuit. The circuit also includes a limiting circuit coupled to the comparator and configured to receive a rectified voltage and to provide a voltage-limited output in response to the rectified voltage to the first input of the comparator. The circuit also includes a threshold supply circuit configured to provide a threshold voltage to the second input of the comparator, and a filter coupled to the comparator. The filter is configured to convert the pulse-width modulated output of the comparator to the dimmer reference level signal.
Inventors:
ANISSIMOV VIATCHESLAV (US)
Application Number:
PCT/US2011/037638
Publication Date:
January 26, 2012
Filing Date:
May 24, 2011
Export Citation:
Assignee:
OSRAM SYLVANIA INC (US)
ANISSIMOV VIATCHESLAV (US)
ANISSIMOV VIATCHESLAV (US)
International Classes:
H05B37/02; H05B37/03; H05B41/38; H05B44/00
Foreign References:
| KR20090124728A | 2009-12-03 | |||
| KR20090120044A | 2009-11-24 | |||
| KR20060120452A | 2006-11-27 | |||
| KR20010085530A | 2001-09-07 |
Other References:
See also references of EP 2578064A4
Attorney, Agent or Firm:
MONTANA, Shaun P. (Danvers, Massachusetts, US)
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