Radiant energy – Photocells; circuits and apparatus – Signal isolator
Reexamination Certificate
2011-06-21
2011-06-21
Legasse, Jr., Francis M (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Signal isolator
C250S2140SW
Reexamination Certificate
active
07964860
ABSTRACT:
An energy saving driving circuit and method is provided for use with a solid state relay (SSR). The circuit and method reduce the overall energy required to drive a solid state relay by maintaining the SSR in an “on” state with a minimal maintenance or holding current after applying a turn-on current. The driving circuit includes a control circuit configured for outputting a control signal; a turn-on circuit configured for providing an output current at a first current level for a first time period in response to the control signal; and a holding circuit configured for maintaining said output current at a second reduced current level for a second time period. The maintenance or holding current is reduced in respect of that of a conventional driving current, and in some cases may be an order of magnitude or more less in magnitude than a conventional driving current, thereby resulting in less energy consumed by the SSR.
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Avago Technologies ECBU (IP) Singapore Pte. Ltd.
Legasse Jr. Francis M
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