Back to results
US 2013/0271184 A1Published application
Zero crossing detector (zcd) circuit
AssigneeMarvell World Trade Ltd.
InventorsJose Luis GONZALEZ MORENO, Alejandro ACUNA MUNOZ, Pedro Antonio MARTINEZ CORISCO, Mario Bruno NAVARRO PRIMO, Antonio PAIRET MOLINA, Riccardo TONIETTO
Life of this patent
Estimating the term…
Abstract
A system for detecting a Zero Crossing point is provided. The system includes: a coupling unit connected between a high voltage side and a low voltage side of the system; and a zero crossing detector connected to the high voltage side and configured to divide a filtered mains voltage signal and to generate an output signal that indicates a zero crossing point of the filtered mains voltage signal.
Claims20
A method comprising:
- filtering noise in a mains voltage signal;
- dividing the mains voltage signal in order to obtain a low voltage signal;
- and
- generating an output signal from the low voltage signal, wherein the output signal indicates a zero crossing point of the mains voltage signal.
1 more element
A system comprising:
- a coupling unit connected between a high voltage side and a low voltage side of the system;
- and
- a zero crossing detector connected to the high voltage side and configured to obtain a low voltage signal by dividing a filtered mains voltage signal and to generate an output signal that indicates a zero crossing point of the filtered mains voltage signal.
Dependencies are inferred from the claim text.