Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-10-04
2005-10-04
Hofsass, Jeffery (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S315000, C340S315000, C340S315000, C340S315000, C340S571000, C340S870030, C340S870030, C235S439000, C235S449000, C235S451000, C235S491000, C235S492000
Reexamination Certificate
active
06952167
ABSTRACT:
An output of a resonant circuit60which electromagnetically couples with an external communications apparatus is rectified and taken out, and a resultant output voltage V is monitored by a switch control circuit61. After the output voltage V has risen to or beyond a threshold Vth1, a switch element SW is turned on and off, and a state of the switch element SW in which the output voltage V becomes higher is determined. While holding the switch element SW in the state thus determined, a power supply switch element PSW is turned on when the output voltage V has further risen. As a result, even when a plurality of noncontact IC cards6overlaid with one another are brought close to the communications apparatus, the individual noncontact IC cards6can carry out data communication.
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Dickstein , Shapiro, Morin & Oshinsky, LLP
Hofsass Jeffery
OMRON Corporation
Pham Lam
LandOfFree
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